Bad pcm symptoms - Bonneville Pontiac Cars & Trucks

1 photo from your service manual, (buy it?)
RF fender, drives seated perspectives.always.

Symptoms of a Bad Body Control Module - Buzzle

www.buzzle.com/articles/symptoms-of-a-bad-body-control-module.html

Dec 31, 2014 - Let's take a look at the signs that indicate body control module failure. ... Shock: This module can be in jeopardy if the car was subjected to ...

What all does the BCM control? What are the symptoms of a bad one ...

www.chevyhhr.net/.../what-all-does-bcm-control-what-symptoms-bad-o...

Feb 21, 2012 - It would also shift really hard, and die if I did not 2 foot it. ... The BCMalso talks to the PCM, RBCM, Airbag Control Module, and the Factory ...

What a Faulty PCM and BCM Can Cause... - YouTube

? 3:50
https://www.youtube.com/watch?v=2rudYtZUahQ
Feb 24, 2011 - Uploaded by DanielJaegerFilms
Thought the ECM was bad so I replaced it. ... Once I get the $$$ together to test/replace, I'll update you on if it .... Someone pleasetell me how to fix this. ... In automotive electronics, BCM (body control module) is a generic term ...

Symptoms of a Bad PCM , vehicle won't start an run sometimes ! You have other modules involved here ! ABS an BRAKE light lit are problems with the anti-lock brakes ! A sensor maybe ! You need to have the vehicles modules scanned for DTC's - diagnostic trouble codes . An depending what year , make an model vehicle it can have several hundred different codes possible. Newer vehicles have up wards of 10 or more modules .Your going to need a better grade scan tool like the one in this video ! Auto Repair The OTC Genisys Touch Scan Tool Sounds like you need to take this to a pro !

Dashboard error lights come on randomly. running poorly, will not run, emissions are high. Emit to much smoke, colored exhaust white, blue, black on depending whats wrong. and may smell like fuel. Hope this helps!

Could be. But these are also symptoms of a bad ground wire. Check the engine to body ground.

that is the PCM, you are scanning,,, you never said .
it means the perminante memory in the controller is scrambled.
is this a 2004 libertry or a 1995 GC?
the 2004 the trans brain is inside the PCM now.
so what is 12? that is olden days codes, not 2004....
tell the full story,, (symptoms) so i wipped out my OBD2 scan tool
jacked in to the PCM and ......???????
that?
if you get checksome errors)
1: low battery voltage, parked key off is 12.6v, if not charging issues.
2: PCM bad, pull battery cable, minus, wait 5 min, then put back.
the memory can read corrupted for 3 reasons
1: low battery
2: memory is bad. (vast reasons inside)
3: PCM is bad.

this is a good possibility. if its green its moldy, does the car have a musty smell in it when it sets closed up for awhile? pcm is up under the dash behind the glove compartment. so any water that gets in will run over it. I would find the water issue if its the cause.

There are no symptoms that point directly to a PCM. The way a PCM is usually diagnosed is by confirming that everything into it is good and even then it's iffy.

What does that mean?

The Manifold Absolute Pressure (MAP) sensor responds to changes in the intake manifold pressure (vacuum). 5 Volts is supplied to the sensor from the PCM (powertrain control module). Inside the MAP sensor is a resistor that moves in relation to manifold pressure. The resistor varies the voltage between about 1 volt to 4.5 volts (depending on engine load) and that voltage signal is returned to the PCM to indicate manifold pressure (vacuum). This signal is essential for the PCM to determine fuel delivery. A P0107 DTC is set when the PCM sees that the MAP signal voltage is less than .25 volts which is too low.
FB.init("dd7d9e9681341cde77587bc6a2029f6f"); OBD-Codes.com on Facebook Potential Symptoms

Anytime the MAP sensor signal is low the vehicle will likely have a very difficult time starting. Other symptoms may include:

• Hard to start
• Long cranking times
• Sputtering/missing
• Blowing black smoke
• Poor fuel economy
• Dies intermittently
• MIL(Malfunction Indicator Lamp) illumination

Causes

The causes of a low MAP sensor signal circuit (P0107) could be any of the following:

• Bad MAP sensor
• Open or short in the signal circuit
• Open or short in the 5 Volt reference circuit
• Ground circuit open or shorted
• Bad PCM

Symptoms of a P0118 could include:

• Very poor fuel economy
• A no start condition
• Vehicle may start, but run very poorly, blowing black smoke, running very rough and misfiring
• Illumination of MIL

Causes A code P0118 may mean that one or more of the following has happened:

• A bad connection at the sensor
• An open in the ground circuit between the ECT Sensor and the PCM
• A short in the voltage feed between the sensor and the PCM
• A bad PCM (less likely)
• A bad temperature sensor (shorted internally)