Question about Jeep Grand Cherokee
Got p0128 troubleshooting code
The Engine Coolant Temperature (ECT) sensor on the 5.7L engine is located under the air conditioning compressor. It is installed into a water jacket at the front of the cylinder block.
Posted on Jan 09, 2013
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Posted on Jan 02, 2017
Here is the definition of the code in GM manual:
P0128 - Coolant Thermostat Below Thermostat Regulating Temperature, this indicates the engine is running cold, u need a thermostat
Posted on Feb 12, 2009
The egr valve is located on the front of the right cylinder head. It has a tube attached to it and going to the intake manifold.It has failed and is why your jeep is running rough and hesitating. Replace it and it will fix your driveabllity issues. Disconnect the battery for 2 min to clear the code.
Posted on Apr 02, 2009
Problem is a faulty Steering Angle Sensor (part of Steering Module) located in steering column ...replacement part $600.00.
Posted on Apr 16, 2009
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This means that the engine's PCM detected that the engine has not reached the required temperature level within a specified amount of time after starting the engine. The intent of the P0128 code is to indicate a faulty thermostat. Similar codes: P0125
In determining the engine did not reach a "normal" temperature, it takes into account the length of time the vehicle has been running, the intake air temperature (IAT) sensor reading, the engine coolant temperature (ECT) sensor reading, and the speed of the vehicle.
A code P0128 may mean that one or more of the following has happened:
Past experience indicates that the most likely solution is to replace the thermostat. However here are some suggestions on troubleshooting and repairing a P0128 OBD-II code:
I hope this helps a bit!
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