Question about 2005 Dodge Grand Caravan

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05 DODGE GRADN CARAVAN CMP SENSOR REPLACEMENT

My check engine light came on and I had the codes checked out, first was the coolant temp sensor, which I have replaced, then after a few days the light came back on, this time the CMP sensor was bad or intermitent, or timing belt needs to be repalced, the van has only 50000 miles, I had replaced the CMP sensor and the van worked for a while but my temp gauge went all the way up even if the engine was dead cold, the fans kicked in, I drove it for about 7 miles and the light came on again, I had the code checked and it was the same as the first time p0304. Should I replace the CMP sensro again.?.

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  • d-irigoyen Nov 18, 2008

    Thanks for ansewring but :

    Why Would be the coolan relevant to the misfire?



    Since then, I had both the cam and the crankshaft sensors replaced and still not working I even replaced the computer and still not working.



    any I deas.

  • Anonymous Mar 16, 2014

    engine check linght stay on

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  • 512 Answers

P0304 is a misfire code for the #4 cylinder is the coolant level low...maybe you have a headgasket problem

Posted on Nov 13, 2008

  • Russell Bailey Nov 19, 2008

    if coolant is leaking into the cylinder it will drowned the spark,,,,,also a burned valve could cause it

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P0128 - Coolant Thermostat (Coolant Temperature Below Thermostat Regulating Temperature)

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.

Symptoms: You will likely not notice any drivability problems other than the MIL illumination.

Causes: A code P0128 may mean that one or more of the following has happened:
* Low engine coolant level
* Leaking or stuck open thermostat
* Faulty cooling fan (running too much)
* Faulty coolant temperature (ECT) sensor
* Faulty intake air temperature (IAT) sensor

Possible Solutions: 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:
* Verify coolant strength & level
* Verify proper cooling fan operation (check if it's running more than it should). Replace if necessary.
* Verify proper engine coolant temperature (ECT) sensor operation, replace if necessary.
* Verify proper intake air temperature (IAT) sensor operation, replace if necessary.
* If the above items check out good, replace the thermostat
* If Nissan vehicle, check for Technical Service Bulletins (TSBs), as the ECM may need to be reprogrammed to correct the P0128 code

Hope helps (remember to rate and comment this).

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