Code 42 question
Thread Starter
Pro
Joined: Nov 1999
Posts: 659
Likes: 0
From: Woodland Ca
Code 42 question
I have about 200 miles on a rebuilt engine. I've passed the smog test here in Calif. So it should be running properly.
If the service engine soon light comes on at the start up on one trip and stays on, but on the next start up it doesn't and it goes back and forth each time...is this what called intermittent? Even if each trip is 40 miles each time?
I have the GM service manual and it does give tests for each code, but I am having a hard time understanding it. I guess it's because I don't know how to use an Ohmmeter. I have one. But havn't used it.
If I read the text right, I first need to find out if the codes intermittent.
and go from there.
Is anyone familar with code 42?
What is the most likely cause of it?
What step have been taken to correct it with or without the manual?
Thanks
:flag :flag :auto: :flag :flag
If the service engine soon light comes on at the start up on one trip and stays on, but on the next start up it doesn't and it goes back and forth each time...is this what called intermittent? Even if each trip is 40 miles each time?
I have the GM service manual and it does give tests for each code, but I am having a hard time understanding it. I guess it's because I don't know how to use an Ohmmeter. I have one. But havn't used it.
If I read the text right, I first need to find out if the codes intermittent.
and go from there.
Is anyone familar with code 42?
What is the most likely cause of it?
What step have been taken to correct it with or without the manual?
Thanks
:flag :flag :auto: :flag :flag
Team Owner
Joined: Dec 2000
Posts: 90,675
Likes: 304
From: SE NY
Cruise-In II Veteran
Re: Code 42 question (BIG K)
Verify that the "Set Timing Connector" in the Tan/Blk wire is solidly inserted.
When the manual calls for a resistance reading set your DMM to Ohms, connect the black lead to a ground (metal frame) and the red lead to the indicated point.
When the manual calls for use of a "test light" set your DMM to DC Volts scale. Then a positive steady voltage is the same as light is On.
In both cases your DMM should be set to "auto range".
When the manual calls for a resistance reading set your DMM to Ohms, connect the black lead to a ground (metal frame) and the red lead to the indicated point.
When the manual calls for use of a "test light" set your DMM to DC Volts scale. Then a positive steady voltage is the same as light is On.
In both cases your DMM should be set to "auto range".
Thread Starter
Pro
Joined: Nov 1999
Posts: 659
Likes: 0
From: Woodland Ca
Re: Code 42 question (65Z01)
I have already checked the Set timing Connector. Does it need to be cleaned out too?
The Meter that I have is the kind with the big yellow rubber case(protector?). Is the parts on the meter easy to locate and turn on.
Sorry about my ignorance.
Thanks for you help!
The Meter that I have is the kind with the big yellow rubber case(protector?). Is the parts on the meter easy to locate and turn on.
Sorry about my ignorance.
Thanks for you help!
Burning Brakes
Joined: Mar 2003
Posts: 1,174
Likes: 6
From: NW MN
Re: Code 42 question (BIG K)
The meter you have could be any number of different brands. The yellow case is very common to a FLUKE meter. FLUKE is the manufacturer and it is in my opinion the best one out there, I use one everyday on my job. To test for resistance you need to set the dial to the ohms scale, the symbol is an "Omega". If your meter is a Fluke the scale is auto ranging. Hope this helps, if you need more help on using the meter send me an instant message.
Safety Car
Joined: Feb 2002
Posts: 4,212
Likes: 10
From: Sun City West Az
Re: Code 42 question (86Pacecar)
No disrespect. In reading your post, I'm trying to understand what exactly you are having a problem with. If you have the GM manual and the flow chart for code 42, then it is a matter of "following the bouncing ball". Do you know where the Ign. coil driver connector is located? If so, then 65Z01 has explained on how to use the DMM to test the circuit(s). You are having a problem with the coil driver, ground or ECM. How can we help?
Thread Starter
Pro
Joined: Nov 1999
Posts: 659
Likes: 0
From: Woodland Ca
Re: Code 42 question (ittlfly)
I think:
1) I was tired and most likely miss read the intructions.
2) Let not being familar with it intimadate me.
ittlfly, I like your responce. You go some great people skills. Hope that they are paying you enough to keep you at your job.
Thanks
1) I was tired and most likely miss read the intructions.
2) Let not being familar with it intimadate me.
ittlfly, I like your responce. You go some great people skills. Hope that they are paying you enough to keep you at your job.
Thanks
Safety Car
Joined: Feb 2002
Posts: 4,212
Likes: 10
From: Sun City West Az
Re: Code 42 question (BIG K)
1). Lesson learned not to work on car when tired.
2). You have jumped a hurdle and the next problem with the car won't give half of the agrivation this one did.
3. Thank you and your welcome.
:cheers:
2). You have jumped a hurdle and the next problem with the car won't give half of the agrivation this one did.
3. Thank you and your welcome.
:cheers:
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