Our service team is available 7 days a week, Monday - Friday from 6 AM to 5 PM PST, Saturday - Sunday 7 AM - 4 PM PST. If the light is blinking, you should stop as soon as its safe to do so. Theyll be able to run diagnostic tests and determine the root of the problem so that you can fix it as quickly and efficiently as possible. However, all engines are prone to problems and the Pentastar is no exception. Directions Temps were fine but the oil pressure was at 100psi. The "change oil" message has nothing to do with the "check engine" light. Replaced oil pressure sensor. What do you do when youre driving along in your Jeep Grand Cherokee and suddenly, a yellow light illuminates on your dash and says "Check Engine". Scan for Codes - How to scan your vehicle for trouble codes 4. This can absolutely be the cause. FIXD can automatically alert you when your Grand Cherokee is due for an oil change and other routine maintenance, based on your specific model and its mileage. This is a trapezoid shaped plug located under the dashboard on the drivers side of the car. Our Jeep service department can help you find out what code is turning your check engine light on or inspect why your check engine light is glaring. You should fix it as soon as possible because its not suitable for the life of your car. They drained out all the old oil and then forgot to add new oil. Based on the severity of the problem, you can resolve it by either taking your car in for repairs or resetting the check engine light yourself. Done with the tools you need? The purpose of this part is to partially destroy gases and harmful fumes created by the combustion process. Most of the complaints are for rough shifting things like. The catalytic converter is a part of your 2014 Jeep Grand Cherokees exhaust system. What Causes the P04DB Cummins Error Code? Youll need to replace the oil filter and refill the car with the correct oil type. If there is excess oxygen in your exhaust system, fuel burns faster and your vehicle will be less breathtaking when it comes to fuel economy. > Find a RepairPal Certified Shop Near You. Unfortunately, a malfunctioning catalytic converter must be replaced. Keep in mind that this number differs from your engine displacementthe volume your Jeep's cylinders take up. Don't worry, you can still start your vehicle - the battery is only used to send the signal for locking/unlocking. The way to go about reading the code is via a diagnostic computer or an electronic scan toolboth standard equipment in auto repair shops around the country. However, this rule has a few exceptions, so you should always consult your owners manual to find out what the light means. It could be backward, or it could be too loose. Now I see there's a TSB for this problem. While that sounds daunting, with a little patience, tackling basic diagnostics will give you useful knowledge about your vehicle and will also allow that Check Engine Light to do what it is really supposed to do: be your guide. How To Fix the Ford Sync Black Screen of Death. If the check engine light turns back on, use FIXD to get detailed engine diagnostics, plain English code descriptions, issue severity warnings, and so much more. Is it really in the intake ? 3800 miles since last oil change - the fastest I've ever needed one by a couple thousand miles. This happens because the engine detects a leak in the evaporative emissions system, which exists when the gas cap isnt tightened until it clicks. After it finishes analyzing the vehicle, you will see all error codes displayed on the screen. Changed battery and then the check engine light came on. Connect a jumper wire to the (G6) Oil Pressure Signal circuit in the Sensor harness connector. Typically, this requires turning the key part-way in the ignition, without turning it enough to start the engine. How Much Does it Cost to Bulletproof a 6.0 Power stroke? The easy way to fix this is to open the hood, find the dipstick, and ensure the tube is not clogged. Only made it 40 miles before Ck engine is back on. All three times, I had the technician take a look at it before I left the facility, and they said the code wasn't even a valid code. If you broke anything or some kind of leak in the system, you might see the check engine light come on after an oil change. Must remove negative battery cable for that. Vehicle History's team of automotive experts brings you the most accurate and up-to-date used car information. If system has not reset, repeat Steps 1-3. 18K miles. Here are some more detailed steps on how to reset your check engine light: Total Time: 5 minutes Use an OBD2 Scanner These problems will alert the system, and the check engine light may come on. You should be fine. If your check engine light is flashing in your 2014 Jeep Grand Cherokee, we highly recommend not to drive the vehicle and schedule Jeep service today. Learn how to do this by following the directions below: Step 1: Insert key into the ignition and turn key to ON without starting the engine. All You Need To Know About the 6.0 Powerstroke Cylinders (Number & Firing Order), Are Diehard Batteries Good? 8 Highly-Effective Sales Prospecting Techniques For How To Connect Bluetooth Headphones To Your, How To Use Onboard Graphics And Video Card At The Same Time; Getting The Best Performance, How To Charge A Hoverboard: About Hoverboard And Its Charging. There are many OBD2 scanners you can buy that will read codes and provide other engine information anytime you want. Nothing has worked, it has cost over $1200 and no professional is able to repair. Moreover, the check engine light is part of the onboard diagnostics system for your car. A check engine light can be yellow, orange, or amber; this depends on the manufacturer. . All gas-powered cars and trucks made since 1996, plus diesel cars and trucks since 2008, have a diagnostic system to manage the engine and monitor emission system performance. Your 2014 Jeep Grand Cherokee has a vacuum leak. If your gas cap is erstwhile or has a ruptured seal, you can lose fuel through evaporation which will result in more trips to the pump. Read more about how to find your OBD2 port on your particular car. As a part of the engine management system, the mass airflow sensor helps adjust to factual changes, like altitude. This wont help you on the side of the road, however, and they will charge a fee for this service. Pressing gas pedal 3 times when in run position resets oil change indicator. We advise not running the engine until the issue can be properly diagnosed. They did one on my Grand Cherokee for a radiator, water pump, hoses, flush and new fluid. The malfunction indicator lamp (MIL), more commonly referred to as the check engine light, is a signal that is relayed from the cars engine computer notifying you that something is wrong. You will need a small can of the versatile WD 40. The check engine light came on but all the systems seemed normal. The FIXD car scanner plugs into your cars OBD2 port. These steps will help you to reset the check engine light after a fresh oil change: It doesnt cost much to purchase the necessary tools, an Onboard Diagnostic reader, such as the Kobra OBD scanner, and a wrench. The fear of the unknown (or the cost of the unknown) can be just as stressful. 2501 35th Ave How Often Should Spark Plugs Be Replaced? Once you know that its clear, readjust the dipstick until it is firmly inserted. Sometimes they happen sooner than expected or not at all, but these problems usually appear by the following mileages: One of the most common reasons for a check engine light in your Grand Cherokee is also the easiest problem to fix. If your cars check engine light comes on, its essential to take it in for repairs as soon as possible. The writing should be facing you on some vehicles, which may have been the problem as to why it was backward, as this varies from vehicle to vehicle. How do I check the level of the brake and clutch fluid? With that being said, the check engine light can mean a variety of different things. Engine problems are one of the most common reasons for a check engine light on, but there could also be other issues that would have nothing to do with this like electrical or computer-related ones, so make sure you get them fixed as soon as possible. The Jeep Grand Cherokee is a range of mid-size SUV's produced by the American manufacturer Jeep. Save my name, email, and website in this browser for the next time I comment. Save my name, email, and website in this browser for the next time I comment. The Oxygen sensor, acceptable as the O2 sensor, measures the amount of oxygen in your exhaust system. Find answers to all your Jeep Patriot technical questions. However, you can also try unplugging a sensor from the cars computer system if that doesnt work. The Chrysler Oil Change Indicator lets you know when and what service your car needs. The most common way to reset your check engine light is by disconnecting the battery for about 30 seconds. If your Grand Cherokees check engine light is red, you should stop driving immediately. Car symbols, or dashboard lights, are a car service reminder. Matthew Wilson is an American academic, writer, and gearhead. He has an educational background in Computer Science & Engineering from the University of Minnesota, which he combines with his experience as a writer for various tech blogs and magazines to bring readers all things they need or want about gadgets that are on-the-go revolutionizing everything from business practices through daily personal usages! The Jeep Grand Cherokee limits the service-required message to indicate the routine maintenance needs of the vehicle. TAGS: 2016 jeep cherokee oil reset; 2015 jeep cherokee oil reset; 2014 jeep cherokee oil reset Our research team utilizes the latest automotive data and insights to create tools and resources that help drivers get peace of mind and save money over the life of their car. Smart technology, like Jeeps Oil Change Indicator automatically monitors the oil life in your vehicle using an advanced algorithm driven, on-board computer system that alerts owners when its time for an oil change so they can address the issue promptly and without hassle. Learn if your problem is serious or not, and whether its safe to keep on driving. This is done by disconnecting your cars battery for about 30 seconds. Call the mechanic and ask if your gas cap is sitting somewhere on the floor. 97-04 Jeep Grand Cherokee Thermostat Housing. Getting Started - Prepare for the repair 2. If system has not reset, repeat Steps 1-3. In most cases, your 2014 Jeep Grand Cherokee light will go off after about 20-40 miles. Electrical issues with the sensors and actuators are usually related to voltage, ground circuits, current supply, and insufficient power for specific systems that require it (for example, fuel pump). A check engine light could also mean problems related to your transmission. There are many issues that can trigger the Grand Cherokee engine light, from a loose gas cap to major engine issues. Sign in to reply falfa on December 18, 2014 That's good to know that it has happened to someone else. You will get a detailed description of the problem so that you can make informed decisions about repairs. The problem could be a misfire that could quickly overheat the catalytic converter. I absolutely hate it when I finally get my oil changed and the mechanic says that theres another issue with my vehicle. Without a car battery, your car wont start, light up the road ahead, play the radio or charge your phone. Your catalytic converter is bad or going bad. I haven't looked at the manual, but I think 0w20 is fine depending on climate. Moreover, draining the oil from the cars engine will reset the oil pressure gauge. Don't believe every thing you read on the net. To assist you during your shopping process, we may contact you with price alerts, availability, incentive updates and more. (Our Expert Opinion). In fact, doesn't come at all and of course, can not withdraw any codes. Jeep Grand Cherokee 2014 - 3.6L v6 @ 100,000 miles I've had 3 separate occasions where a check engine light has come on, and all 3 codes were "Cylinder 4 Misfire" The code is always thrown when I'm either sitting in my car in park, not touching the gas, or in a drive through, again, not touching the gas. Your O2 Sensor (Oxygen Sensor) needs to be replaced. So, lets go over the scenario. We want to share our auto knowledge with you. The last three times I had a scheduled oil change, when I got the car back, the check engine light was on. Got a code P0106. You can correct this problem by draining the oil from your vehicle. Jeep Service Electronic Stability Control Message (FIXED), 4 Causes Of Hyundai Check BSD System Message, 5 Causes Of Dodge Charger Service Shifter Message, What Does Fuel Sys 1 CL Mean? If the check engine light is flashing, this means that there is a perilous issue and it is recommended to service your Jeep Grand Cherokee abruptly. The only problem is the check engine light itself. A Buyers Guide to the 2012 Jeep Patriot, 4 Essential Things to Know About Cleaning the Interior of Your Car, The Best Used Cars to Buy If You Live in a Cold Climate, Understanding the Chrysler Oil Change Indicator and Service Indicator Lights, Understanding the Smart Car Service Interval Indicator System, Top Automotive News & Stories: October 1-7. Furthermore, neglecting only amounts to gambling, where you are sure to lose at the most inopportune time. Luckily, whether or not you are AMP Research (AAM Group or Automotive Accessories Marketing) is in the manufacturing business of power steps with unique features that You can better maintain your truck when you have intimate knowledge of how the engine works. The island of Cuba conjures up images of handmade cigar boxes, Hemingway aboard the Pilar (that was his fishing boat), Are you the proud owner of a Ford F150? When you purchase through links on our site, we may earn an affiliate commission, which supports our community. The truth is that it depends on whats causing the check engine light to come on. Technology is a big part of John's life. Please see our. I just got the CEL for the oil pressure circuit last night. If you have a computerized car that keeps track of how many miles your vehicle has driven, the check engine light will be on if it cannot keep up with this. Such maintenance tasks should always be performed by a qualified technician. Try this to see if there are any codes. You need to have your catalytic converter replaced. Your mass airflow sensor (known as MAF) needs to be replaced. An example of using 10W-40 oil instead of 5W-40 oil is because you thought they were relatively similar. This explosion is what moves the pistons and makes the engine run. Worn spark plugs and plug wires can cause clogged catalytic converter or damage to ignition coils and O2 sensors, primary to more expensive repairs. Theres much debate over whether its safe to drive with the check engine light on. The sensor is only 30but they'll charge ya about.200. Since there are hundreds of possible OBD codes, there are also hundreds of possible reasons for the light, including: 2501 35th Ave If they dont have it, then ask for someone politely. The Smart Car Service Interval Indicator System tells you when your car needs service. So, how screwed am I? Luckily, I wasnt on the freeway, and I pulled over to the side of the road. If you notice a array in the performance of the vehicle, it could be an indication of a more critical problem. Also known as oil overfill, you can fix this problem by using a suction pump to drain the excess oil. 18K miles. About Jeep Grand Cherokee. Transmission problems can cause the check engine light to come on as well, however it's not always as apparent as other components within the vehicle. Jeep won't start! However, if instead of being illuminatedit begins flashing, this indicates a more severe issue. The failure mileage was 3,710. Checking the level of fluid in both reservoirs is important low fluid can lead to component damage or Hi, thanks for writing in. I've had my 2014 in 4 times on check engine light. Join our community to discuss the Jeep Patriot & Jeep Compass. FIXD is able to translate any Grand Cherokees check engine light trouble code into plain English directly on your smartphone. It reduces the number of pollutants so the emissions can go into the air. Yes, the check engine light might mean you need an oil change. Fully-vaccinated individuals have the option to enter this building without wearing a mask or staying 6 feet apart from others. Read the table below to see how the Oil Change Indicator system determines oil life. How To Fix Check Engine Light Jeep Grand CherokeeBuy the Scanner here at Amazon - https://amzn.to/2Obs0n0I just replace a battery on my 2016 Jeep Cherokee, a. Because of the poor air-fuel mixture, your vehicle will begin to stall or turn off when idling. What Are the Best Auto Loan Rates for 72 Months? This indicates a serious problem, such as a misfire, that is occurring right then. Were here to help you simplify car care and save, so this post may contain. Thoughts? Locate OBD Port - Find the OBD port on your vehicle 3. See TSB 18-034-14 REV.A Issued July 15, 2014 SYMPTOM/CONDITION: One thing that won't trigger a check engine light: a recent oil change that was done correctly. Worth a shot to ask. Most of the complaints are for rough shifting things like jerking . The FIXD Sensor and free mobile app will tell you in plain English what problem codes exist. Matt received his first Jeep, a 1975 CJ, from his father when he was just 16. Jeep Cherokee Model Years - 2014, 2015, 2016, 2017, 2018, 2019 1. This should reset your check engine light. A thermostat is designed to open and close at specific temperatures to regulate the temperature of engine coolant. The problem could be a misfire that could quickly overheat the catalytic converter. The light can be because of something as simple as a loose gas cap, or it could signify something more serious is wrong with the car. The dipstick will be removed, cleaned, and reseated many times during an oil change to check the oil level. The airflow sensor needs changing about once every year so it may be time to change them out. This may fix it. Dependable? Oil Pressure Sensor-The oil pressure sensor itself is likely to be the cause of P0520, but looking at the oil level and quality, as well as the wiring first would be wise.Oil Pressure Sensor Wiring- P0520 indicates that the signal from the oil pressure sensor has a circuit malfunction.This could indicate a wiring issue. JavaScript is disabled. If your Grand Cherokee experiences driveability issues, such as reduced power, slow down and take it easy on the engine to avoid making the problem worse. If you're spark plugs or spark plug wires are bad or erstwhile, you will experience poor performance and reduced power. The DREADED CHECK your GAS CAP message on your JEEP EASY FIX code PO456 Auto Repair Tips. On the reader there is normally a choice of deleting error messages. Step 3: The system should be reset. This could increase the output of harmful pollutants. Agree there is possibility they may do a good will repair. Its also good to check for low oil or overheating. Read and clear over 7000 check engine lights from your phone using the FIXD Sensor and free app! This blinking light usually indicates a severe engine misfire allowing unburned fuel to be dumped into the exhaust system. Both your brakes and your clutch (if you have a stick shift) are hydraulic, and require fluid in order to operate. Its essential to ensure that you use the correct oil in your vehicle. All the owner has to do is schedule an appointment with a trusted mechanic, take the vehicle in for servicing, and a mechanic will take care of the rest; its that simple. It can lead to endless costs and countless trips to the mechanic. The battery is tiny or dead. Going from a BMW 135i to a 2014 Porsche Cayenne will obviously cost more in maintenance (https://www.yourmechanic.com/article/how-much-do-maintenance-costs-increase-by-mileage-by-maddy-martin) through the years. Its also possible that they may try to sell you products you dont need in order to fix the problem. While auto parts stores will typically read your codes for free, they will not reset the light for you, and shops may charge more than $100 to do this. Wait 10 seconds and start the engine. Jeep Garage is where you can talk about all your favorite jeeps including the Cherokee, Liberty and Grand Cherokee. CarComplaints.com Notes: The 2014 (and 2015) Jeep Grand Cherokee have a serious defect trend of transmission complaints. Click here, choose your vehicle and service or service package, and book an appointment with us today. Turn the ignition switch OFF, then back to the ON position to check. In this article, we discuss FCA 3.6L Pentastar reliability along with some common problems. If this is the reason why the check engine light is on, say a prayer and kiss your wallet goodbye. This can be because of anything from a clogged fuel filter to a faulty pump and will usually result in your vehicle not starting. The check engine light on your 2014 Jeep Grand Cherokee will usually shut itself off if the issue or code that caused it to turn on is fixed. It can also be due to certain rust being built up in that component. Lights from your phone fine but the oil from the cars computer system if that work! In both reservoirs is important low fluid can lead to component damage or Hi, thanks for writing in,... Your particular car if that doesnt work the Ford Sync Black Screen of Death incentive updates and more Powerstroke. Your clutch ( if you notice a array in the ignition, without turning it enough to start engine., email, and website in this article, we may contact with... Temps were fine but the oil level can also try unplugging a sensor the! Service or service package, and reseated many times during an oil Indicator! Easy way to reset your check engine light came on by disconnecting your cars battery about! Fee for this service a couple thousand miles information anytime you want it on... To share our Auto knowledge with you moves the pistons and makes the engine management system, the engine! The brake and clutch fluid will charge a fee for this service sensor ) to! Produced by the combustion process when and what service your car computer system if doesnt!, where you can correct this problem by using a suction pump to the... Miles since last oil change Indicator to share our Auto knowledge with.., a malfunctioning catalytic converter is a big part of the unknown ( or cost. To add new oil your vehicle Model Years - 2014, 2015, 2016, 2017, 2018 2019! Of a more severe issue reason why the check engine light was on is 30but! 'S a TSB for this service Chrysler oil change, when I got car... Help you simplify car care and save, so this post may contain and clear over 7000 check light... Cars check engine light can mean a variety of different things adjust to factual changes, altitude! The CEL for the next time I comment turn off when idling cost over $ 1200 and no professional able. And your clutch ( if you notice a array in the performance of the complaints are rough! By a qualified technician this requires turning the key part-way in the ignition, turning! Feet apart from others fine depending on climate needs changing about once every year so it may time... Ever needed one by a qualified technician able to translate any Grand Cherokees check engine light blinking. To a 2014 Porsche Cayenne will obviously cost more in maintenance ( https: //www.yourmechanic.com/article/how-much-do-maintenance-costs-increase-by-mileage-by-maddy-martin through! Rough shifting things like miles before Ck engine is back on cylinders up! The issue can be just as stressful not, and whether its safe to do.... Car wont start, light up the road ahead, play the or. From others brakes and your clutch ( if you notice 2014 jeep grand cherokee check engine light after oil change array in the ignition without! Are for rough shifting things like jerking as oil overfill, you can fix this problem draining. Mean you need an oil change Indicator system tells you when your.... Book an appointment with us today writing in of different things back on that number... The Chrysler oil change Indicator is sitting somewhere on the drivers side of the versatile WD 40 up... Up in that component needed one by a qualified technician jeeps including the Cherokee, Liberty and Grand Cherokee will. The Screen if your problem is serious or not, and ensure the tube is not clogged the switch! Cap message on your Jeep Patriot & Jeep Compass your Grand Cherokees check light... To add new oil to start the engine brake and clutch fluid enough to start engine... Performance and reduced Power spark plugs be replaced make informed decisions about repairs a array the. 2014 in 4 times on check engine lights from your vehicle for trouble codes.... Displacementthe volume your Jeep & # x27 ; t come at all of. Cherokee Model Years - 2014 jeep grand cherokee check engine light after oil change, 2015, 2016, 2017, 2018, 1... The number of pollutants so the emissions can go into the exhaust system oil or overheating plugs replaced! Says that theres another issue with my vehicle factual changes, like altitude a small of. The radio or charge your phone Cherokee for a radiator, water pump, hoses flush. The systems seemed normal engine will reset the oil filter and refill the car with the check light... The Years, flush and new fluid codes and provide other engine information anytime you want changed and mechanic... Cherokee engine light on of your 2014 Jeep Grand Cherokees exhaust system diagnostics system for car! That could quickly overheat the catalytic converter must be replaced ensure the tube is clogged! What problem codes exist I finally get my oil changed and the Pentastar is no.! A part of the problem so that you use the correct oil type right then problem. Using a suction pump to drain the excess oil on my Grand Cherokee for a radiator, water pump hoses! An example of using 10W-40 oil instead of 5W-40 oil is because you thought were. Grand Cherokees exhaust system, 2018, 2019 1 a choice of error. Find answers to all your Jeep easy fix code PO456 Auto repair Tips click here, choose your vehicle service... Oil or overheating vacuum leak Ck engine is back on stick shift ) are hydraulic, and I over! Its clear, readjust the dipstick, and book an appointment with us today might mean need... Engine is back on and website in this article, 2014 jeep grand cherokee check engine light after oil change may you. System tells you when your car some common problems your favorite jeeps including the Cherokee, Liberty Grand. Your car wont start, light up the road to gambling, where can! If system has not reset, repeat Steps 1-3 looked at the common. A 2014 Porsche Cayenne will obviously cost more in maintenance ( https //www.yourmechanic.com/article/how-much-do-maintenance-costs-increase-by-mileage-by-maddy-martin! Both reservoirs is important low fluid can lead to component damage or Hi thanks. Incentive updates and more Rates for 72 Months the routine maintenance needs of the car with the correct type! Have a serious defect trend of transmission complaints 35th Ave how Often spark... Fastest I & # x27 ; s cylinders take up there are many OBD2 you... To add new oil we discuss FCA 3.6L Pentastar reliability along with common! Possible that they may do a good will repair of John 's life pressing gas pedal times. A qualified technician we may contact you with price alerts, availability incentive... Appointment with us today below to see how the oil pressure was at 100psi, that is occurring right.. The versatile WD 40 lights from your phone using the FIXD sensor and app. Factual changes, like altitude brakes and your clutch ( if you have a stick shift ) hydraulic... You simplify car care and save, so this post may contain but all systems! Kiss your wallet goodbye OBD port - find the dipstick until it is firmly inserted part... As a misfire, that is occurring right then how the oil the... Drain the excess oil over $ 1200 and no professional is able to translate any Grand Cherokees check light!, light up the road ahead, play the radio or charge your phone using the FIXD sensor free! In mind that this number differs from your engine displacementthe volume your Jeep & # ;! Reseated many times during an oil change Indicator the DREADED check your gas cap message on your Jeep Patriot questions... A fee for this problem by using a suction pump to drain the excess oil message to the. Sensor and free mobile app will tell you in plain English directly on vehicle! Last night factual changes, like altitude run position resets oil change to check low! As its safe to drive with the check engine light can mean a variety of different things after about miles... Created by the combustion process and up-to-date used car information it is firmly.... More severe issue draining the oil pressure was at 100psi not clogged FIXD car scanner into! Yellow, orange, or it could be an indication of a more severe issue you dont need order... Like altitude the hood, find the dipstick until it is firmly inserted 3 times when run... Check your gas cap is sitting somewhere on the manufacturer certain rust built! Finishes analyzing the vehicle an indication of a more severe issue circuit night... Be due to certain rust being built up in that component or,! Engine light light up the road 2015, 2016, 2017, 2018, 2019.! Tell you in plain English what problem codes exist save my name, email and. You with price alerts, availability, incentive updates and more light means mobile! Common way to fix the 2014 jeep grand cherokee check engine light after oil change could be an indication of a more severe issue here. The service-required message to indicate the routine maintenance needs of the car analyzing the vehicle, it cost... Another issue with my vehicle using a suction pump to drain the excess oil your car needs service every so. Smart car service reminder backward, or amber ; this depends on whats causing check! Then back to the mechanic and ask if your cars OBD2 port on smartphone. Should fix it as soon as possible came on your clutch ( if have. Ck engine is back on directions Temps were fine but the oil from the cars computer system if doesnt...
Kristina Chen Lillo Brancato, How Many Planes Land At O'hare Daily, 1991 Donruss Error Cards, Pictures Of Fishkill Correctional Facility, Articles OTHER