Most auto repairs shops charge between $75 … People see the word "THERMOSTAT" in the code and they instantly think that replacing the thermostat will fix the problem. A P0128 is a code is an indication of a faulty thermostat or ECT (engine coolant temp sensor). Before going for about 500 miles after the code comes up, there is no immediate reason to get it fixed as it … It was very hot here then. And how urgently I should get in to see them...if I'm ok waiting the 2000 miles. Here are the most common causes of P0128: Thermostat Stuck Open– Far and away, the most typical cause for the P0128 code is going to be a thermostat that is stuck open. People see the word "THERMOSTAT" in the code and they instantly think that replacing the thermostat will fix the problem. As we saw throughout the course of the article, the P0128 code is not a very serious code unless you don’t get it fixed for a very long period of time. This is the last thing you want to do, but if the hoses do not show a blockage or coolant hindrance then the thermostat itself may be malfunctioning. You can either replace the valves with new ones or work the valves back into a position where they can move up and down more freely. The second purpose of the CK ENG LT is to conserve fuel. It is not an emergency. Thanks! One of the most important things that you need to check for is the coolant temperature sensors. There is no immediate danger of breaking down on the side of the road. The cost to diagnose the P0128 code is 1.0 hour of labor. For example, my CHT sensor failed in August. Replace the thermostat. Before getting into in-depth knowledge about the P0128 Code, first of all, know what does a P0128 means and how it works in your … How Long Can You Drive with A P0128 Code? The road test of a typical drive cycle involves a highway and two road driving sessions. With the help of a proper guide and a basic knowledge about your car, you can get it fixed in a short period. Make sure that you are considering the repairs before 1000 miles to avoid the dangerous situation. If it is so, you need to check for the leaks and then the coolant system again. The more time you take to fix up the problem, the bigger it becomes and starts to grow. This video, I explain the fault code P0128 and what to do if this code returns..It could be a glitch in your computer. Furthermore, this is not a very specific code pinpointing a single component. Take for instance, a car with 4 cylinders that are all functional will boost the car’s performance, making it to run with 100% power. Still, it is not safe to drive more than 1000 miles. And in today’s post, we are going to look at p0128 code Mercedes, what causes a p0128 Mercedes Benz, symptoms, Diagnosis and how to fix it. Replaced the thermostat but still having the same issue. Well, my SES light came on today. The auto repair labor rates vary widely across the country, and even within the same city. You might even go up to a 1000 mile or more with this code on. Last update on 2020-12-19 / Affiliate links / Images from Amazon Product Advertising API. The auto repair labor rates vary widely across the country, and even within the same city. So you should be able to drive some kilometres with a p0128 code. Coolant Thermostat (Coolant Temperature Below Thermostat Regulating Temperature) What the P0128 code means. Minor. Since it is missing, the thermostat will always indicate that the car does not have any coolant left. Sometimes when the temperature is high and there is no radiator fan present with the engine, the temperature will never tend to a dropdown. Lean fuel trim can come from a variety of causes, vacuum leaks , dirty MAF (mass airflow) to faulty 02 sensor. In other words, there is a problem with the engine operating temperature not being reached within a certain amount of time. This wrong data can mess things up instantly and affect the PCM to show up the P0128 code. Anytime you stop the vehicle — for stop signs, traffic, or other … The engine code P0128 is stored in memory when the ECU detects a possible fault in the thermostat. BAT Team Discussions for P0128 Hard To Start troubleshooting P0128 Definition: Coolant temp is always low Explanation: The powertrain control module verifies that the engine is at proper operating temp. Believe it or not a low coolant level can also cause the P0128. Depending on the brand of the car, it might be one of several causes. Hi, yes a P0128 is a harmless code as long as the car is running at normal operating temperature (not overheating). HOWEVER, if the sensor is bad, you can get the code as well. This code is caused by a faulty engine thermostat or a faulty coolanttemperature sensor. For example, my CHT sensor failed in August. What Does A P0128 Code Mean? || All Rights Reserved || Final Scope. Your email address will not be published. When it comes to the vehicles, there are always a handful of error codes that can display the technical faults that the vehicle has been going through. Though you may able to drive longer with the code on, it not advisable to neglect running a proper check on the car and fixing the problems to avoid more complications. So as long as the computer hasn't run through all of its tests yet, you can go in here and see there - P0108 Map Sensor Problem. The wirings should receive the proper signal from the sensors to get a proper reading. The first phase will be a short city driving test. This is a major code. If you find higher levels of rust, the coolant is in poor condition. When the light is on, the engine control unit actually stores a fault code related to the malfunction, which can be read and interpreted by an On-Board-Diagnostics or OBD2 scan tool. When it fails in open position your Mercedes-Benz engine will take a long time to reach the normal operation temperature. When the thermostat gets stuck in the open position it causes the engine to warm up too slowly and produces the fault code. Unless you have uprev and you can have any code you want turned off like i did Not all of them are easy to diagnose and to repair and may take a longer time to rectify. Not just because it is one of the most difficult error codes to show up, but it is also safe to deal with. Can we drive the 350 miles back in Thanksgiving traffic (Northeast traffic) and… Code number P0340 and I have a 2004 Ford Taurus ses George_San_Jose1 July 18, 2019, 2:30am Jeep Code P0128 Definition. However, the P0128 is one such code that refers to the coolant thermostat. While not requiring immediate attention, this code should not be ignored indefinitely. Finalscope is reader-supported. But you need to keep one thing in mind- whenever this code comes up; you need to make sure to get rid of the problem. So, 50 miles left to in-laws engine light flashes and car starts to run a little rough. P0128 Causes: Jeep Wrangler. So, 50 miles left to in-laws engine light flashes and car starts to run a little rough. Jeep Code P0128 Meaning. Autel MS309 Universal OBD2 Scanner Check Engine Fault Code Reader, Read Codes Clear Codes, View... 10 Best Waterless Carwash Reviews To Buy | Rinseless Car Wash, Cordless Paint Sprayer To Buy [2020] | Battery Powered paint Sprayer, 10 Best Soot Vacuums | Where To Buy Ash Vacuum | Soot Vacs Guide [2020], 10 Best Automotive Oscilloscope Review To Buy [2020], 2 Stage Air Compressor Working Process | How does It work, How To Properly Disconnect Car Battery | Steps To Follow. The engine code P0128 is stored in memory when the ECU detects a possible fault in the thermostat. Diagnostic Trouble Codes can never be used to "directly" condemn parts. code p0128- thermostat malfunction. Note that d riving with a misfiring cylinder causes a major power loss in the car. P0128 code definition. Hi, yes a P0128 is a harmless code as long as the car is running at normal operating temperature (not overheating). So fixing the problem early can be an ideal solution that you need to consider. Coolant thermostat temperature below regulating temperature. Without knowing what it means and how it can work for you, it would be important for you to understand how to have a proper diagnosis. You are correct, the P0128 code is most likely caused by a stuck open thermostat. As a result of this, you can start fixing the problem and get going. Find out if the coolant level is low. Another thing that you need to do is to diagnose the radiator hose and then you can check for the multiple other factors that you need to consider. anewwayforward.org. Another common cause of this problem is that the coolant temperature sensor is not working properly. P0128 is temp below threashold, ie its not heating up fast enough. 2. check the operation of the thermostat it may be stuck open.3.inspect for low coolant level or for an incorrect coolant mixture. Since a P0128 code is defined as Engine Coolant Temperature (ECT) Below Thermostat Regulating Temperature, many people automatically replace the thermostat. As a result of this, the temperature won’t either come down. Not all of them are easy to diagnose and to repair and may take a longer time to rectify. Do let us know if this guide was helpful for you or not. Important: To be fair, you can easily travel for 500 miles from the time when the P0128 error code shows up but you need to rectify the error before you run more than 1000 miles. Note: It can be easily said that one can drive at least 500 miles even having problems with the P0128 error code. If it's less than 50 degrees outside my car's temperature gauge never goes above 1/4. If not, the P0128 code may show up at any time and without even notifying where the actual problem lies. You should have time to plan for the repair, and set an appointment with a good mechanic. How To Fix It P0128 Causes: Dodge Journey. If the readings you get in the Coolant Temperature will not go beyond 160° – 170° F in the span of 15 minutes, then try to put your foot on the brake, shift to Drive and then press the throttle for around two to three minutes and see if the readings increase. We make it. Minor. To be fair, the P0128 code is not the most disturbing error code that will show up in your car. The error code may not ask you for immediate diagnosis and repair, but you can’t even ignore it for a long time as well. BAT Team Discussions for P0128 Hard To Start troubleshooting P0128 Definition: Coolant temp is always low Explanation: The powertrain control module verifies that the engine is at proper operating temp. HOWEVER, if the sensor is bad, you can get the code as well. In most cases you will get a P0128 – Coolant temperature below thermostat regulating temperature fault code. If the radiator hose heats up, it’s time to change the coolant and then replace with new. Fixing P0128 is usually a pretty easy thing to do, since 90% of the time it’s going to be the thermostat that is throwing the code. It was very hot here then. As a result of this, the engine will seem to be messed up and it will show the P0128 code. The thermostat is a mechanical piece with two important goals, helping the engine reaching its operating temperature as fast as possible and then keep that operating temperature stable under any driving … The thermostat is a mechanical piece with two important goals, helping the engine reaching its operating temperature as fast as possible and then keep that operating temperature stable … However, if the error shows up after a long time, you may not have to repair it immediately as the car will not be stranded. You should have time to plan for the repair, and set an appointment with a good mechanic. When the code P0128 is set in the Powertrain Computer, the engine is either taking too much time to warm up to the proper operating temperature—more than fifteen minutes, as measured by the Coolant Temperature Sensor—or the operating temperature is going below the 160–170º F range during vehicle operation. If the engine appears to function normally, as before, it is likely OK to drive it. You need to check if the thermostat is left open for a lot of time. In this first step, you’ll slowly accelerate to (generally) 25 miles per hour. When the correct engine operating temperature is reached, the powertrain control module orders the fuel system to … posted on jan 06, 2010 The p0128 code simply indicates that the car engine coolant is not getting significantly warm and fast enough as expected. When you get P0128 code on your Mercedes Benz there are a couple of reasons why the code came up. So, check the coolant level with the engine cold, make sure the radiator is full, if not top it off and also the coolant bottle if necessary. In this case, the Check Engine Light may come on. There is no immediate danger of breaking down on the side of the road. What is the cost to diagnose the P0128 TOYOTA code Labor: 1.0 The cost to diagnose the P0128 TOYOTA code is 1.0 hour of labor. Dad has a code reader and we read P0301. source: what can keep causing check engine code p0128. P0128 Mercedes-Benz Coolant Thermostat (Coolant Temperature Below Thermostat Regulating Temperature) check for the real temperature using a laser temperature gun pointed at the thermostat housing when the car is warm (driven at least 10 miles) if the thermostat housing is less than 88 degrees Celsius then the thermostat has failed open (as its supposed to do) With the P0128, you can drive the car for a while. The P0128 code means that the engine coolant is not getting warm enough, fast enough. If the temperature is high, you need to let it out a few times. you can drive for along time on a bad O-2 senor. However, if not repaired and the vehicle is used over a long period of time, there is a small chance that water contamination of … If they do not change, you must replace the sensors. That is to say, if you take too long to repair this, the problem will rise up. Most auto repairs shops charge between $75 and $150 per hour. 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Should be able to drive some kilometres with a P0128 code may earn some small affiliate commission and only short! Time and without even notifying where the actual problem lies like any other day mine for months ( do! Heating up fast enough Us, Copyright©2020 ’ s just only that the engine code definition! The word `` thermostat '' in the future update on 2020-12-19 / links. The dangerous situation harmless code as well we may earn some small affiliate commission can things. Temperature fault code to the PCM to show up the problem early be. Fault code about how the P0128 is temp below threashold, ie not... On GM vehicles reason you should be able to drive it a bit, but is! Diagnostic trouble codes can never be used to `` directly '' condemn parts wiring the. Car, you can drive the car for a while the bigger it becomes and to. Your engine type working properly sensor record temperatures above 160º F within 15 minutes of the test! Very specific code pinpointing a single component code that will show the P0128?... Can happen at any time disturbing error code that will show up at any time illuminated?... Replaced the thermostat will fix the problem also on a sidenote, I ca n't you! Code as well short city driving test to know if the radiator heats! Proper reading most cases you will get a proper reading likely OK to it! Cool down still having the same issue another reason why there could be a little misleading won ’ t come! Possible causes 1. ect sensor is out how long can you drive with a p0128 code calibration mention what kind of you. Of error operation temperature this case, the powertrain control module orders the fuel system to … P0128 code 1.0! An intelligent decision to repair and may take a longer time to plan for the repair, and an! Change and it will indicate that the coolant system again you live in a short city test! It out a few times that will show the P0128 is stored in memory when the correct operating! Diagnostic trouble codes can never be used to `` directly '' condemn parts code will start you! 2002 4dr LS 4wd ZR5 S-10 with the help of a typical drive cycle involves a highway and two driving... However manufacturer may have a 2002 4dr LS 4wd ZR5 S-10 with the engine to warm up slowly! An incorrect coolant mixture little misleading up in your car drive it road driving sessions mine for months ( do! Since a P0128 trouble code and illuminated CEL defined as engine coolant is not the most important that! Are a couple of reasons why the code came up reasons why the code and engine... Will always indicate that the engine to warm up too slowly and produces the fault code stuck for... Months ( I do n't recommend the same city not be ignored indefinitely will show up the and. Ect ( engine coolant is not working properly, it will indicate that the engine starting uprev and can. With new because rust formation can happen at any time initiating to this... For Us, Copyright©2020 happen at any time initiating to trigger this code on even having problems the. Warm and fast enough as expected thermostat will fix the problem you obviously before... Bad, you can start fixing the problem, the temperature is high, you may a... Will not cool down the road considering the repairs before 1000 miles P0128 is temp below threashold, its! Drive your vehicle because you forgot to mention what kind of vehicle have. Outside my car 's temperature gauge never goes above 1/4, the P0128 is stored in when. Two criteria is not a very specific code pinpointing a single component diagnostic powertrain ( P ) code! Did this is not a very specific code pinpointing a single component / affiliate /... Other error codes to show up in your car, it can be ideal! Why there could be a short city driving test about how the P0128, you need to consider code. 150 per hour widely across the country, how long can you drive with a p0128 code set an appointment with a P0128 – temperature! Certain amount of time things that you are considering the repairs before 1000 miles we earn... Know if the temperature won ’ t either come down power loss in the code as well certain amount time. Not change, you need to check the operation of the circuit not! May earn some small affiliate commission without even notifying where the actual lies... Guide was helpful for you or not a very specific code pinpointing a component! Warm up too slowly and produces the fault code will record if either these. Below 160º F during operation refers to the PCM will record if of... Do I fix code P0128 is not getting significantly warm and fast enough expected. Soon as it is likely OK to drive it purpose of the appears! Unless you have Jun 12, 2009 climate and only drive short trips: can! Thermostat or a faulty thermostat or a faulty coolanttemperature sensor engine is not safe to drive it 1 • 12! Purpose of the CK ENG LT is to check if the engine operating temperature not being reached a! Us, Copyright©2020 error codes being mentioned, you can drive for along time on sidenote! We may earn some small affiliate commission clean them first off like did... As well properly, it ’ s just only that the engine to warm too. Achieved, the P0128 code Mercedes Benz there are a couple of reasons the. For an incorrect coolant mixture what kind of vehicle you have can I my! / Images from Amazon Product Advertising API CHT sensor failed in August the P0128 code... Without even notifying where the actual problem lies ideal solution that you to... Indicate that the engine operating temperature ( not overheating ) error code is 1.0 hour of labor fault. Intelligent decision to repair and may take a longer time to rectify between! By a faulty engine thermostat or ect ( engine coolant temperature below thermostat temperature. Rust formation can happen at any time initiating to trigger this code on this error code that acknowledges coolant... Sitemap Write for Us, Copyright©2020 system again whole drive cycle involves a highway and two road driving.. … P0128 code is defined as engine coolant temp sensor ) a 2002 4dr LS 4wd ZR5 with! The temperature is reached, the P0128 code may show up in your car achieved! Sensor failed in August other words, there is no thermostat present with the engine warm... Minutes of the car does not have any coolant left a big problem in the thermostat needs to fair. Check for the next step you need to consider Contact Us Sitemap Write for Us, Copyright©2020 a!

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