Code 42, how do I fix?
Thread Starter
Registered User
Joined: Mar 2002
Posts: 1,290
From: IL
Code 42, how do I fix?
I keep gettin' the code 42, every since I installed a new Opti/coil/ICM.Itseems to be pulling timing 5* across the board. How do i fix this?? Install error? Faulty piece? Need help!
Last edited by flyinZ; Aug 15, 2005 at 01:13 PM.
Thread Starter
Registered User
Joined: Mar 2002
Posts: 1,290
From: IL
Re: Code 42, how do I fix?
Turns out that this code is an Opti code..Its missing a signal from the Opti, to the PCM..Either has to be either the Opti, or the pigtail harness....Anybody have this problem?
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Joined: Nov 1998
Posts: 71,110
From: Hell was full so they sent me to NJ
Re: Code 42, how do I fix?
DTC 42 = Ignition Control (IC) circuit (shorted or grounded circuit)
Not necessarily an "opti code"..... can be related to many components in the ignition system. It may set along with other codes for an Opti related problem, but is related to the signal from the PCM to the ICM being shorted out.
As a result, the factory manual includes a fairly complex diagnostic tree that allows you to step your way through the possible problems, eliminating them one at a time. You need to get a copy of that diagnostic chart and work your way through it. If you can't find it online, I could probably find a copy that I could fax to you.
Not necessarily an "opti code"..... can be related to many components in the ignition system. It may set along with other codes for an Opti related problem, but is related to the signal from the PCM to the ICM being shorted out.
As a result, the factory manual includes a fairly complex diagnostic tree that allows you to step your way through the possible problems, eliminating them one at a time. You need to get a copy of that diagnostic chart and work your way through it. If you can't find it online, I could probably find a copy that I could fax to you.
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