2003 Chevy  Monte Carlo. I replaced the PCM with a new one. had it programed and did the relearn procedure twice, car still will not start. When I did the relearn no telltale signs of the security showed.I put a PCM in from a different car and I can start the car but no gas gauge and trans shift points all wrong. When I did the relearn on used pcm the ringer went off the entire time, but no ringer with new computer. PLEASE HELP THANKS.

 

Answer: You did not specify the reason for the PCM replacement. Was it to fix a no start problem?
Assuming the new PCM was a new factory, and not an aftermarket, and it is the correct part number, the theft system and indicator is controlled by the BCM, not PCM. The chime should not be on when relearning theft system- this is also controlled by the BCM. Sounds like you have a BCM problem, or a more common problem with the theft system- the Passlock sensor / ignition cylinder.


Shift points are controlled by PCM with what is called "Adapts". Basically it learns the way you drive to set shift points for best shift. A new, or used computer would need time to relearn shift points. A used computer may not have same programming for your car, which can cause all sorts of problems.

 


Be Social With Us !

Leave your comments

Post comment as a guest

0
    • No comments yet.

    Latest Articles

    2015 Ford F-150 Door Panel ...

    How do you remove the door panel from a 2015 F-150 Crew Cab? I am looking at the front passenger ...

    How to turn radiator fans on ...

    I have a 2006 Chrysler town & country van, I'm trying to add refrigerant to the air conditioner but ...

    Engine Knock On Chrysler ...

    Question: picked up a low end knock after driving under normal conditions. ran and drove fine, but ...

    2006 Silverado Bogs Down Code ...

    I have a 2006 Silverado 5.3 and the check engine light recently came on showing code p0442. I have ...

    Login Or Register

    Log In Or Register
    ? The Benefits

    How Things Work

    Exhaust Recirculation System - Known As EGR Valve

    The Exhaust Gas Recirculation (EGR) system is used to lower Oxides of Nitrogen (NOx) emission levels caused by high combustion temperature. It does this by decreasing combustion temperature.

    The main element of the system is the linear EGR valve. The EGR valve feeds small amounts of exhaust gas back into the combustion chamber. With the fuel / air mixture diluted by the exhaust gases, combustion temperatures are reduced.

    Read more...

    Common Engine Codes

    Code P0341 Cam Position Sensor

    During cranking, the ignition control (IC) module monitors the 7X crankshaft position sensor signal. Once the IC module determines spark synchronization, 3X reference signals are sent to the powertrain control module (PCM). The PCM will command all six injectors on for one priming shot of fuel in all cylinders.

    Read more...