1999 Chevrolet Suburban PCM/ECM

Tiny
HELLOHIWELCOME
  • MEMBER
  • 1999 CHEVROLET SUBURBAN
  • 7.4L
  • V8
  • 4WD
  • AUTOMATIC
  • 304,000 MILES
How do I know if I have a faulty PCM/ECM? What are the signs and symptoms? I do have a P0327 and P0430 code. Are these codes related to a faulty PCM/ECM?
Tuesday, December 1st, 2015 AT 12:45 PM

1 Reply

Tiny
WRENCHTECH
  • MECHANIC
  • 20,761 POSTS
There is not test for a faulty PCM. It is probably the hardest thing to determine to be faulty.

The basic way you find a bad PCM is to eliminate every other thing in the system, verify all the inputs and outputs to the PCM are correct and even then it's a roll of the dice.
SPONSORED LINKS
Was this
answer
helpful?
Yes
No
-1
Tuesday, December 1st, 2015 AT 4:13 PM

Please login or register to post a reply.

Related Engine Computer Content

Engine Computer
GUIDE
Engine Computer
The automotive engine computer, also known as the ECU, PCM or ECM (Engine control unit, Powertrain control module, Engine control module), is central to a vehicle’s ...
VIEW MORE

Sponsored links