Dodge - Grandcaravan :: 2003 - PCM / Cruise Control And Coolant Temperature Failures
Jul 23, 2012
I have a 2003 Dodge Grand Caravan. This week I encountered the following:
First Symptoms:
1.Red Battery Light
2.Check Engine Light
Action Taken: Since car is 9 years old with original battery, I replaced battery. Boy, that battery was really good.
Symptoms observed after battery installed
1.Red Battery Light
2.Check Engine Light
3.0 reading on Engine Temperature
Action Taken: Tightened battery cable nut and red battery light went out. Took car to local mechanic who found and reported –“Code 1478/Battery Temp Sensor, tested/was overvoltage allowed (4.9 for more than 3.2 seconds). Sensor located internally in PCM. PCM will have to be replaced.”
Symptoms observed on drive home: Drove car home. On the way, the battery and check engine lights went out. Engine coolant temperature came up ¼ scale. Cruise control would not work. Later, during drive, the battery and check engine lights came back on, cruise control continued to be nonfunctional, engine temperature gauge went to 0.
Action Taken: Took car to local dealer who replaced the PCM at a cost of $605 for the part and $135 for labor.
Subsequent Observations: After 45 miles on the drive home the check engine light came on.The car was driven 2 days later. Battery light came on for about 5 miles then went off; check engine light remained on for the entire drive (~40 miles); cruise control remained nonfunctional and coolant temperature indicator read about ¼ scale.
What is/are the likely cause(s) of all these problems and what can I do? We've had very few problems with this car to this point, but these issues are really getting expensive fast.
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