Q: Do I have ECM/PCM problems?

asked by on

I have issues with my jeep wrangler dash instrument panel lights going crazy, not only that when I drive it for a few and shut it off, I'm not able to crank it again till after it cools down a few. My mechanic also said he has checked Grounds ETC. Also he checked the Alternator to see if it was doing what it is suppose to do,,, It was showing REVERSE POLARITY. Is this something that the ECM/PCM would control? Also does it disturb the idle control of the Jeep? When he pulled the connector from the Alternator everything went away but the charge light for the battery, but reconnecting it brought back all the lights flashing, and erratic idle speed.

My car has 119343 miles.
My car has an automatic transmission.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Do I have ECM/PCM problems?

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Q: Possible electrical problem

Describing the symptoms is very important when your car is not running like it normally does. Only you know what the car usually acts like. If the vehicle is: not starting, blowing fuses, having battery trouble, showing flickering lights, etc.,...

Q: New batt New alt batt voltage still drops?

It's possible that the charging circuit is not properly connected (wiring, fuse, or ground fault) or there is some large excess current draw in your car's electrical system. Basically, if the battery is new and fully charged and charging system...

Q: Seal a gap between crankshaft position sensor and rubber?

You do not need to worry about water getting into the clutch area. You can add silicone around the sensor if you want to add it to the gap between the rubber and the sensor, but there is no need....

Related articles

Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...