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Code 42

Tiny
KZUELICH
  • MEMBER
  • 1988 CHEVROLET 1500
  • 5.7L
  • V8
  • 4WD
  • AUTOMATIC
  • 2,000 MILES
I am getting a code 42. I replaced the distributor, knock sensor, and ECM. Is there away to test the ESC module?
Wednesday, October 11th, 2017 AT 1:40 PM

7 Replies

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 42,895 POSTS
You can take it to an auto parts store they have a special machine that can check it for you.

https://www.2carpros.com/articles/buick-cadillac-chevy-gmc-oldsmobile-pontiac-gm-1983-1995-obd1-code-definitions-and-retrieval-method

I would start by replacing the ignition coil that is usually what that code means. I would check the module anyway.

Please let us know what happens.

Cheers, Ken
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Thursday, October 12th, 2017 AT 11:36 AM
Tiny
KZUELICH
  • MEMBER
  • 13 POSTS
Okay I will change the coil. Got one here at home on Monday when I am off.
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Thursday, October 12th, 2017 AT 1:33 PM
Tiny
KZUELICH
  • MEMBER
  • 13 POSTS
I think I found the problem the wires from the distributor to the coil are not even connected will replace on payday.
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Thursday, October 12th, 2017 AT 2:16 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 42,895 POSTS
Nice work, we are here to help, please use 2CarPros anytime.

Cheers, Ken
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Friday, October 13th, 2017 AT 10:00 AM
Tiny
KZUELICH
  • MEMBER
  • 13 POSTS
Ok made coil wires. Still ran like crap. Put a new coil that I had still runs like crap anything else I need to test.
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Tuesday, October 17th, 2017 AT 2:03 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 42,895 POSTS
Please pull the spark plugs and check there condition. If you can snap a picture of them and upload it here. If they are okay I would suspect an ignition module.
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Tuesday, October 17th, 2017 AT 5:45 PM
Tiny
KZUELICH
  • MEMBER
  • 13 POSTS
Ok will do
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Wednesday, October 18th, 2017 AT 6:06 AM

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