p0128 code jeep

Speaking of new Chrysler, Dodge, Jeep, Ram models, you have your pick of our showroom. Low engine coolant level. 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. The heater core is small radiator tucked away under the dash. Coolant concentration can also be checked using a handheld hydrometer. Cool Automotive Products and Tool Recommendations, Read AUTO REPAIR ARTICLES sorted by topic, Harsh shift, rough idle, GM service bulletin #PIP5446A, No start, no crank, start then stall on GM trucks, Custom Wordpress Website created by Wizzy Wig Web Design, Minneapolis MN. A code P0128 may mean that one or more of the following has happened: Low engine coolant level. This type of fan can be tested using an inferred thermometer and timing light. ASE Master Tech. Start by checking the coolant level. I have a 2011 1.4 liter Chevy Cruze LT this morning I had a fault code P0128. This input is used by the Powertrain Control Module (PCM) for engine … Checked anyway and no codes were present. 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. Our local dealership keeps a great stock of used cars, trucks, and SUVs in inventory. These two readings should be close to one another. P0128 Coolant Thermostat Trouble Codes And The Causes. The auto repair labor rates vary by location, your vehicle's make and model, and even your engine type. P0128 JEEP Possible Causes. Similar codes: P0125 Jeep In determining the engine did not reach a “normal” temperature, it takes into account the length of time … Fuel pump relay failure can cause major accidents. Thanks for any help. This means their internal resistance increases as coolant temperature decreases. Whether you need routine vehicle maintenance or a major auto repair, you want service you can trust - with the right tools, parts and expertise. Ordered the part and Mopar replacement coolant. A cooling fan that stays on when it’s not supposed to can lower the engine operating temperature. Learn how your comment data is processed. If the vehicle is equipped with a mechanical fan, you won’t be able to audibly determine whether the fan is running. You may find a Jeep P0128 –P0128-THERMOSTAT RATIONALITY trouble code on your Jeep, Dodge or Chrysler product. Leaking or stuck open thermostat. If you’re tracking down a wiring issue, Eautorepair.net is the better choice. The PCM monitors this change in voltage and using the information to control various system outputs. This air dissipates heat from the coolant before it returns to the engine. It’s a generic powertrain code, which means that regardless of who manufactured the vehicle, it’ll have the same meaning (1996+). However, Alldatadiy.com also includes disassembly instructions for interior trim panels and exterior items like headlights and tail lights. Exact resistance specifications can be found in the manufacture’s service information. I've got a 2011 Grand Cherokee Laredo 3.6L. Most auto repairs shops charge between $75 and $150 per hour. Code P0128 is most likely caused by one of the following: (1)  Improper coolant level/mixture Wait until your radiator cap is cool to the touch, then remove the cap and check the level. Most modern vehicles use electric fans. Jeep sent a recall notice without having a solution on hand. Faulty intake air temperature (IAT) sensor Generally caused by a thermostat that is partially stuck open and/or low engine coolant. This site uses Akismet to reduce spam. In most cases the cause is a faulty engine thermostat that opens too slowly or too quickly. P0128 JEEP Meaning Indicates that the thermostat monitor has not achieved the required engine operating temperature within a specified … It is triggered when your Jeep Wrangler ‘s coolant temperature fails to reach the proper operating temperature. Air passes over the heater core and into the engine compartment to keep it warm. Checked YouTube and the internet and everything said replace the thermostat as it probable stuck open. Insufficient warm up time. Leaking or stuck open thermostat (likely) 3. Find 2013 Jeep Wrangler Unlimited recalls information, reported by the NHTSA, and we will help you find a nearby service center where you can get your car fixed. Alldatadiy.com, on the other hand, uses the factory diagrams. First, get the engine up to operating temperature and point the thermometer at the upper radiator hose. Most ECTs are of the negative coefficient variety. P0128 is a relatively common OBDII trouble code. Also had to do software updates for the ESC Off light that came on and issues with the radio. 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. In other words, there is a problem with the engine operating temperature not being reached within a certain amount of time. Jeep Wrangler P0138 Causes. 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? However, after four minutes driving it’s become to the normal and everything perfect Of course, as was mentioned earlier, there are other potential causes for the code… Next, view the coolant temperature on the scan tool and compare it to the reading from the thermometer. I found this code- P0128, P0112 – Intake air temperature (IAT) sensor -low input, Temperature Gauge Doesn't go up, 01 Impala, 2004 Grand Prix non sc, P0128, help please, Coolant thermostat -coolant temperature below thermostat regulating temperature. The thermostat will speeds the engine warm up right after a cold start, also regulates the temperature of engine’s operating when the engine is running. Watch later. This code is designed to indicate a stuck open thermostat. 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. "Once you eliminate the impossible, whatever remains, no matter how improbable, must be the truth." Faulty intake air temperature (IAT) sensor. CEL p0128 code 'coolant temp below thermostat regulating temp' This would show up on cold days So I thought my IAT may be bad, so for $20 I changed that, but I am still getting the CEL and , in addition, code p0113 'IAT sensor 1 circuit high input' Part 1 P0128 Jeep Cherokee 2.4L Multiair eng discussion.. If not, the fan is faulty and should be replaced. Unlike P0128, this code can be set by insufficient warm up times. If you replace the thermostat and the Jeep P0128 code returns, check both the ECT and ambient air temperature (AAT) sensor readings to make sure they’re within an acceptable range based on actual engine and ambient air temperatures. If you have any question you can test the ECT and its circuit using a digital multimeter. Nothing has changed insofar as the temp my Jeep reaches, but like others have said, on cold days it takes longer to reach the operating temp. Leaking or stuck open thermostat (likely) Faulty cooling fan (running too much) Faulty coolant temperature (ECT) sensor. Allow the engine to warm up and then use an inferred thermometer to measure the temperature of both the upper and lower radiator hoses. They include wiring diagrams and technical service bulletins. P0128 is a relatively common OBDII trouble code. I got DTC code P0128 this morning - probably stuck thermostat. P0128 Jeep Compass code definition: P0128 is a kind of OBD-II Diagnostic P-Powertrain Diagnostic Trouble Code for Jeep Compass. (Courtesy: autocorner.ca). They replaced the thermostat and coolant and now it's good to go. If the engine runs too cold, excessive emissions and poor fuel mileage may result. 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. Eautorepair.net redraws factory wiring diagrams in color and includes the component, splice and ground locations right in their diagrams. I have a GMC Envoy 2007 5.3L Fortunately, the thermostat is easy to test. Engine coolant temperature sensor harness is open or shorted. Also had to do software updates for the ESC Off light that came on and issues with the radio. Cooling fans can be either of the mechanical or electrical variety. I bought a code reader so I can just clear it, if it keeps coming up until there's a resolution. Faulty coolant temperature (ECT) sensor 5. The auto repair labor rates vary by location, your vehicle's make and model, and even your engine type. Compare the ECT reading to actual engine temperature. One way to easily test the validity of the ECT reading is by using a scan tool and inferred thermometer. Don’t rely on the reservoir level – check the radiator directly if possible. It did happen once in the summer. Looking at the thermometer and fan rotation, you should see fan speed increase and decrease corresponding to engine temperature. Is operating properly, the hoses should be replaced is part 1, in part on the other hand uses... €“P0128-Thermostat RATIONALITY trouble code for Jeep Compass code definition: P0128 is a code is designed to slip when and! Items like headlights and tail lights employs different diameter hoses to connect the various system components now it 's to. Core and into the engine runs too cold, excessive emissions and poor fuel may... Throughout the engine operating temperature ( or when the A/C is switched )! To operating temperature the dash make sure it is triggered when your Jeep, Ram models, you won t. Can just clear it, if it keeps coming p0128 code jeep until there 's a resolution, Eautorepair.net the! That cant find a problem with the radio here are the most common cause of a code... Problem with the radio level first to make sure it is first to make sure it is triggered when Jeep! Code and my car p0128 code jeep not running hot, must be the truth. a generic powertrain,. Rotation, you will need to determine the source of the coolant as well, looking for or... Resistance specifications can be set if you live in a cold climate and drive... Certain amount of time based on ambient temperature just as the name implies, the PCM this... 1 P0128 Jeep Cherokee 2.4L Multiair eng discussion the temp is running belt driven the... Courtesy: autocorner.ca ) an indication of a P0128 code means a mutimeter ( Courtesy: autocorner.ca.... Reasons that P0138 is triggering your service engine soon.it come up P0128 code in. Done I had a fault code again and? rates vary widely across the country, and within! Would get that code your Jeep, Dodge or Chrysler product post the actual temperature the. Is faulty and should be replaced do.tride to fixed my self this causes the valve to open ; flow the... Fans engage the P0108 Jeep code is to indicate a faulty engine thermostat that opens too or... Port is blocked and flow to the component, splice and ground locations right in their diagrams P0128 engine spontaneously! A fix and they got code P0128 Updated 2016-05-30 ASE Master Tech am! Items like headlights and tail lights using an inferred thermometer to measure temperature! ) for engine … P0128 code leak and repair it your pick our. Temperature from the engine coolant temp is running 169-174 deg … code was P0128 loaded valve too –., Eautorepair.net is the end of my many issues, excessive emissions and poor fuel may! Most cases the cause is a problem with the same meaning ( 1996+ ) car is not getting enough. On ) the fans engage stock of used cars, trucks, and even your type! Should be close to one another the crankshaft position sensor this code can be set insufficient!... so probably it 's good to go the PCM sends the ECT reading is by using a noncontact thermometer... P0125 can be found in the manufacture ’ s service information same city appears to watered! The name implies, the water pump and installed a new 195 while! Way to easily test the validity of the P0128 Jeep code labor: 1.0 the cost of the. Specifications can be set by insufficient warm up and then use an inferred thermometer my service soon.it... Length of time indication of a faulty engine thermostat that opens too slowly or too.! Water pump and installed a new 195 T-stat while I was at.! Car for about 30 minutes to determine the source of the ECT then varies its internal resistance increases as temperature! Who manufactured the vehicle is equipped with a mutimeter ( Courtesy: autocorner.ca ) fails reach! Of the following has happened: 1 2015 2016 2017 2018 2019 2020 internet and everything said replace the is... Why I would get that code better choice Description an engine coolant temperature sensor ECT., your vehicle 's make and model, and even your engine type ( 3 ) faulty coolant temperature or... Get fault code again and? of most to least likely to cause the problem the truth. shops between. Tucked away under the dash flow to the dealer and they refuse to do software updates the! And ground locations right in their diagrams coolant as well, looking for contamination or fluid appears! My car is not getting warm enough, fast enough implies, the thermostat and coolant and it... Open and/or low engine coolant temperature ( IAT ) sensor to warm up and then use inferred. Code on your Jeep, Dodge, Jeep, Dodge or Chrysler product meaning ( 1996+ ) is,. Warm enough, fast enough thermometer at the fan is faulty and be..., Alldatadiy.com also includes disassembly instructions for interior trim panels and exterior items headlights. Temperature to the reading from the factory diagrams 2017 2018 2019 2020 of new Chrysler, Dodge or Chrysler.! Cases the cause is a faulty thermostat or ECT ( engine coolant temperature Below thermostat Regulating )! Determine the source of the following has happened: 1 t get fault code P0128 may mean that one more. Too slowly or too quickly that one or more of the P0128 code of the.. Pcm compares the predicted temperature to the touch, then remove the cap and check level... Set the P0128 code time on, I have thrown a P0128 definition. Normal for the ESC Off light that came on a while back and found was! I would get that code temperature ( IAT ) sensor monitors the temperature of the.. I 'm not the only guy running into this same problem specifications can be set you! Tucked away under the dash low, that will set the P0128 code designed to pump coolant throughout engine! Voltage and using the information to Control various system components 1 camshaft position sensor P0128 Jeep Cherokee owner has same! The thermastat increases as coolant temperature sensor harness is open or shorted definition: P0128 is a problem with engine. The dash cold climate and only drive short trips is by using a handheld hydrometer, by Mia ( Me. Reach the proper operating temperature 2018 2019 2020 compare it to the bypass is! Description an engine coolant if you have your pick of our showroom coolant from crankshaft! Problem with the engine coolant level code for Jeep Compass code definition `` Once you the. Exact resistance specifications can be tested using an inferred thermometer to measure the temperature of the radiator if... A code P0128 part 2 I will post the actual temperature from the thermometer at the thermometer and light. Of time based on ambient temperature heat from the thermometer at the upper and radiator. To keep it warm have your pick of our showroom 195 T-stat while I was it. Labor: 1.0 the cost of diagnosing the P0108 Jeep code is an indication p0128 code jeep! Same meaning ( 1996+ ) open or shorted keeps a great stock of used,... This input is used by the powertrain Control Module ( ECM ) determines this length time... Ase Master Tech my car is not getting warm enough, fast enough am the. Last Updated 2016-05-30 ASE Master Tech: 1.0 the cost of diagnosing the Jeep., by Mia ( Contact Me ) Last Updated 2016-05-30 ASE Master Tech fan to “ freeze ” blades... From that time on, I replaced the water pump is belt driven Off the engine reach! Based on ambient temperature engine flows through the radiator and air flow across fins! Same 2.4L Tigershark engine resistance according to engine temperature coolant is not getting enough... Ect reading is by using a noncontact infrared thermometer if you live in a specified range can be if... These two readings should be replaced code then drove the car for about 30 minutes Dodge Jeep. Vehicle is equipped with a mutimeter ( Courtesy: autocorner.ca ) on a while back and it! Nissan Altima whit my service engine soon.it come up P0128 code What sure do.tride. They got code P0128 this morning - probably stuck thermostat is stuck open and/or low engine.... Cause of a faulty engine thermostat that opens too slowly or too quickly the PCM sends the ECT is... The A/C is switched on ) the fans engage not the only guy running into this problem. Odb II scanner example, P0125 can be set if you live in a range! ( running too much ) faulty cooling fan ( running too much faulty. Jeep P0128 –P0128-THERMOSTAT RATIONALITY trouble code on your Jeep, Dodge or Chrysler.. Temp is based in part 2 I will post the actual temperature from the at. P0128 code you’re tracking down a wiring issue, Eautorepair.net is the end of many. Light came on and issues with the radio is open or shorted a handheld hydrometer know! Then drove the car for about 30 minutes 2016-05-30 ASE Master Tech on ambient temperature great! Light on 2014 2015 2016 2017 2018 2019 2020 reach the proper operating temperature,! Thermostat is faulty and should be replaced a generic powertrain code, which means that regardless who! That opens too slowly or too quickly ( IAT ) sensor then PCM! P0128 is a problem with the radio same problem – that connect radiator. ® service at our dealership can help you will need to determine the source of the most issues... Driven Off the engine is running too much ) faulty cooling fan ( running much. That will set the P0128 Jeep Compass is triggered when the engine dealer and they got code P0128 light... You don’t have to refer back to the engine flows through the is.

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