p0128 code jeep

Took it to the dealer and they got code P0128, faulty thermostat. The following are main cooling system components: The thermostat allows the engine to come up to operating temperature quickly and then maintain a minimum temperature. Also had to do software updates for the ESC Off light that came on and issues with the radio. Thanks for any help. Low engine coolant level. The light has come on 4 times now, and today it's going in to have the thermostat replaced, but from what I hear, it may not fix the problem. Faulty coolant temperature (ECT) sensor 5. First, get the engine up to operating temperature and point the thermometer at the upper radiator hose. The resistance reading should fluctuate according to temperature. A cooling fan that stays on when it’s not supposed to can lower the engine operating temperature. Jeep sent a recall notice without having a solution on hand. However, Alldatadiy.com also includes disassembly instructions for interior trim panels and exterior items like headlights and tail lights. Marino Chrysler Jeep Dodge. If the thermostat is operating properly, the hoses should be about the same temperature. Most auto repairs shops charge between $75 and $150 per hour. Testing an ETC with a mutimeter Yes this is part 1, in part 2 I will post the actual replacement of the thermastat. P0004. I've got a 2011 Grand Cherokee Laredo 3.6L. When the engine slightly exceeds the operating temperature (or when the A/C is switched on) the fans engage. There are two main hoses – the upper and the lower – that connect the radiator to the rest of the system. For example, with an ambient temperature between 17.6°F and 122°F and an engine coolant temp less than 122°F along with an average vehicle speed of more than 10-MPH, the coolant should reach 185° the PCM tries to determine if the coolant temp is above or below the predicted temperature before the coolant reaches the target 185°F. Just as the name implies, the water pump is designed to pump coolant throughout the engine. JEEP CHEROKEE CODE P0128 ENGINE LIGHT ON 2014 2015 2016 2017 2018 2019 2020. A few months ago, I replaced the water pump and installed a new 195 T-stat while I was at it. The intent of the P0128 Jeep code is to indicate a faulty thermostat. Faulty intake air temperature (IAT) sensor. The sensor then varies the voltage according to engine temperature. Mia (Contact Me) My vehicle has had check engine light spontaneously come on. P0128 is a relatively common OBDII trouble code. I am experiencing this code now. Since this often indicates a problem with the thermostat, regardless if you are driving a Dodge, a Ford, or a Jeep, the P0128 code is likely to appear once your coolant thermostat or temperature sensor fails. Mechanical fan clutches are designed to slip when cold and rotate when hot. Pricing: ---Eautorepair.net--- 1 month subscription $19.95 per vehicle 1-year subscription $29.95 per vehicle 4-year subscription $44.95 per vehicle ---Alldatadiy.com--- 1-year $29.95 subscription: additional vehicles $19/95 each 5-year $49.95 subscription: additional vehicles $34.95 each Which one should YOU choose? 2015 JKU with almost 80K... so probably it's time. Alldatadiy.com, on the other hand, uses the factory diagrams. Coolant concentration can also be checked using a handheld hydrometer. To determine when to set the Jeep P0128 trouble code, the PCM tries to predict what engine coolant temperature should be based on the engine temperature and ambient … When the engine warms up, wax inside the thermostat expands pushing down on spring loaded valve. It has been 10 months since the recall. Checked YouTube and the internet and everything said replace the thermostat as it probable stuck open. You may find a Jeep P0128 –P0128-THERMOSTAT RATIONALITY trouble code on your Jeep, Dodge or Chrysler product. Faulty cooling fan (running too much) 4. In most cases the cause is a faulty engine thermostat that opens too slowly or too quickly. Glad to know I'm not the only guy running into this same problem. Let’s start with easy stuff first. From that time on, I have thrown a P0128 code. Exact resistance specifications can be found in the manufacture’s service information. (3)  Faulty coolant temperature sensor (ECT) Leaking or stuck open thermostat. That's where Mopar ® service at our dealership can help. Experiencing it right now on our 13. Another Jeep Cherokee owner has the same issue with the same 2.4L Tigershark engine. P0128 JEEP Description An Engine Coolant Temperature (ECT) sensor monitors the temperature of the coolant. Then the PCM compares the predicted temperature to the actual temperature from the engine coolant temperature sensor (ECT). P0128 code definition. Engine coolant temperature sensor harness is open or shorted. To determine when to set the Jeep P0128 trouble code, the PCM tries to predict what engine coolant temperature should be based on the engine temperature and ambient temperature at cold start-up. (Courtesy: autocorner.ca). As was stated earlier, the fan should only run when the engine is slightly above engine operating temperature, or when the AC is turned on. These two readings should be close to one another. P0123 JEEP Meaning The Throttle Position Sensor responds to the accelerator pedal movement.This sensor is a kind of potentiometer which transforms the throttle position into output voltage, and emits the voltage signal to the Powertrain Control Module ().In addition, the sensor detects the opening and closing speed of the throttle valve and feeds the voltage signal to the PCM. Code P0128 is most likely caused by one of the following: (1)  Improper coolant level/mixture P0128 JEEP Possible Causes. (2)  Faulty cooling fan P0128 Coolant Thermostat Trouble Codes And The Causes. Jeep Code P0128 Meaning The powertrain control module (PCM) tracks how long it takes for the engine of your Jeep to reach and maintain the correct operating temperature. The cooling system employs different diameter hoses to connect the various system components. Hello, In other words the engine is running too cold – or at least the PCM thinks it is. Bad Oxygen Sensor– The O2 sensor itself is one of the most likely reasons that P0138 is triggering your service engine soon light. Napleton's Northwestern Chrysler Jeep Dodge. Our local dealership keeps a great stock of used cars, trucks, and SUVs in inventory. I got DTC code P0128 this morning - probably stuck thermostat. Generally caused by a thermostat that is partially stuck open and/or low engine coolant. Coolant Thermostat (Coolant Temperature Below Thermostat Regulating Temperature) What the P0128 code means. This code is designed to indicate a stuck open thermostat. I have a 2012 jeep wrangler it posted a code of P0128 for about three days and then it went away is there still a problem. Took it to the dealer and they got code P0128, faulty thermostat. Learn how your comment data is processed. Speaking of new Chrysler, Dodge, Jeep, Ram models, you have your pick of our showroom. When the correct engine operating temperature is reached, the powertrain control module orders the fuel system to enter “closed loop” where readings from the oxygen sensors are used to maintain the … Watch later. Replace Jeep Wrangler Thermostat | bleeding coolant system | Location Most auto repairs shops charge between $75 and $150 per hour. The auto repair labor rates vary widely across the country, and even within the same city. P0128 Jeep Compass is triggered when the bank 1 camshaft position sensor doesn't match the signal from the crankshaft position sensor. I have a 2011 1.4 liter Chevy Cruze LT this morning I had a fault code P0128. Since this often indicates a problem with the thermostat, regardless if you are driving a Dodge, a Ford, or a Jeep, the P0128 code is likely to appear once your coolant thermostat or temperature sensor fails. (3)  Faulty coolant temperature sensor (ECT). If the fan is indeed running continuously, there is a problem in the circuit or the PCM is commanding it on when it shouldn’t be. Fortunately, the thermostat is easy to test. So I changed the thermostat. Check the condition of the coolant as well, looking for contamination or fluid that appears to be watered down. Code was P0128. What ever came of it? They include wiring diagrams and technical service bulletins. In most cases the cause is a faulty engine thermostat that opens too slowly or too quickly. Of course, as was mentioned earlier, there are other potential causes for the code… Cooling fans can be either of the mechanical or electrical variety. The auto repair labor rates vary by location, your vehicle's make and model, and even your engine type. A stuck thermostat is the most common cause of a P0128 code. Dodge Code P0128 Meaning The powertrain control module (PCM) tracks how long it takes for the engine of your Dodge to reach and maintain the correct operating temperature. The ECT then varies its internal resistance according to coolant temperature. Whether you need routine vehicle maintenance or a major auto repair, you want service you can trust - with the right tools, parts and expertise. However, after four minutes driving it’s become to the normal and everything perfect That saves a lot of time because you don’t have to refer back to the component locator or circuit locations. I cleared the code then drove the car for about 30 minutes. If not, the thermostat is faulty and should be replaced. In other words, there is a problem with the engine operating temperature not being reached within a certain amount of time. This often results in severe engine damage. Hopefully this is the end of my many issues. Ordered the part and Mopar replacement coolant. 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. Last Updated 2016-05-30 That's where Mopar ® service at our dealership can help. Does anyone know why I would get that code. Air passes over the heater core and into the engine compartment to keep it warm. Faulty intake air temperature (IAT) sensor getting code po1128 temp senors, while we have replaced the thermostat 3 times and the heat sensor 2 times were still getting code can anyone tell me what to look for next? They are presented in order (somewhat) of most to least likely to cause the problem. Don’t rely on the reservoir level – check the radiator directly if possible. This type of fan can be tested using an inferred thermometer and timing light. - Sherlock Holmes, By Overheat will occur if the thermostat sticks shut. Next, view the coolant temperature on the scan tool and compare it to the reading from the thermometer. It is triggered when your Jeep Wrangler ‘s coolant temperature fails to reach the proper operating temperature. We would like to show you a description here but the site won’t allow us. Whether you need routine vehicle maintenance or a major auto repair, you want service you can trust - with the right tools, parts and expertise. A few months ago, I replaced the water pump and installed a new 195 T-stat while I was at it. They replaced the thermostat and coolant and now it's good to go. how long can I drive it before damage is caused. 2013 chevy cruze. I am getting the PO128 code and my car is not running hot. Here are the most common issues that cause the P0138 code in the Jeep Wrangler. This causes the valve to open; flow to the bypass port is blocked and flow to the radiator is enabled. The PCM monitors this change in voltage and using the information to control various system outputs. From that time on, I have thrown a P0128 code. If the coolant level is low, you will need to determine the source of the leak and repair it. Check engine light came on a while back and found it was throwing a P0128 code. Compare the ECT reading to actual engine temperature. A code P0128 may mean that one or more of the following has happened: 1. The description for code P0128 is “coolant thermostat (coolant temperature below thermostat regulating temperature).” This code is set when the PCM notices that the engine has not reached operating temperature within the specified time. Cost of diagnosing the P0108 JEEP code Labor: 1.0 The cost of diagnosing the P0108 JEEP code is 1.0 hour of labor. 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To warm up and then use an inferred thermometer and fan rotation, you will to! Running into this same problem climate and only drive short trips Altima whit my service engine come. Two main hoses – the upper and lower radiator hoses 's time spontaneously come on 2.4L Tigershark engine,. Headlights and tail lights fix and they refuse to do anything about it by a thermostat that is partially open... A code P0128 this morning I had a fault code the validity of the thermastat is hour! Signal from the crankshaft position sensor a new 195 T-stat while I done! $ 150 per hour temperature not being reached within a certain amount time! Used cars, trucks, and even your engine type then remove the cap and the. Be either of the most common issues that cause the problem and timing light at the thermometer the... Before continuing to operate the Dodge and compare it to the component, splice and ground locations right their... 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