H42 code still
Thread Starter
Melting Slicks
Joined: Jul 2006
Posts: 2,151
Likes: 0
From: Strongsville Ohio
H42 code still
I just checked my wires around the ICM, coil, Opti and no cuts or severs. I replaced the connector for the ICM, and got the stuff from radio shack for the ICM. Obviously took the batt cables off and connected them after I did this work and I am still getting the H.42 code...Anyone ever fix this issue? My opti is brand new, wires and plugs as well. It starts and runs great just this dang code on my screen.
Burning Brakes
Joined: Mar 2004
Posts: 1,108
Likes: 4
From: Plano Texas
Derek,
An H42 code is a "historical" code. What this means is that at some time in the past a "C42" code, or a "current" code was seen. Now that it is a H42, it means that the condition is no longer occurring. I believe the H42 code will go away after a certain number of ignition on-off cycles. Someone with better knowledge will probably chime in, I hope.
Good luck.
Mark
An H42 code is a "historical" code. What this means is that at some time in the past a "C42" code, or a "current" code was seen. Now that it is a H42, it means that the condition is no longer occurring. I believe the H42 code will go away after a certain number of ignition on-off cycles. Someone with better knowledge will probably chime in, I hope.
Good luck.
Mark
Instructor
Joined: Jun 2011
Posts: 216
Likes: 0
From: Brunswick Georgia
I just checked my wires around the ICM, coil, Opti and no cuts or severs. I replaced the connector for the ICM, and got the stuff from radio shack for the ICM. Obviously took the batt cables off and connected them after I did this work and I am still getting the H.42 code...Anyone ever fix this issue? My opti is brand new, wires and plugs as well. It starts and runs great just this dang code on my screen.
Thread Starter
Melting Slicks
Joined: Jul 2006
Posts: 2,151
Likes: 0
From: Strongsville Ohio
I was having ICM problems. Then after the rebuild the shop couldn't tune the car because of the opti. So they replaced it and now its all good to go. I havent had ICM problems since the rebuild and the opti thing is solved. So you think it will cycle off? Once in a while the service engine light will pop off then come back on. I have NO problems or signs of faulty anything while driving. Just the dang light.
Instructor
Joined: Jun 2011
Posts: 216
Likes: 0
From: Brunswick Georgia
I was having ICM problems. Then after the rebuild the shop couldn't tune the car because of the opti. So they replaced it and now its all good to go. I havent had ICM problems since the rebuild and the opti thing is solved. So you think it will cycle off? Once in a while the service engine light will pop off then come back on. I have NO problems or signs of faulty anything while driving. Just the dang light.
Thread Starter
Melting Slicks
Joined: Jul 2006
Posts: 2,151
Likes: 0
From: Strongsville Ohio
When I start the car, it starts great, runs great after that as well. The light comes on about 3 seconds after I start the car and remains on untill I shut it off. I am reading it could be...knock sensor, esc, ecm ICM...
Instructor
Joined: Jun 2011
Posts: 216
Likes: 0
From: Brunswick Georgia
Are you sure it is module 4 code 41?
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Instructor
Joined: Jun 2011
Posts: 216
Likes: 0
From: Brunswick Georgia
these are PCM or module 4.
but there is another code 42 about selective ride control, do you have selective ride control?
Instructor
Joined: Jun 2011
Posts: 216
Likes: 0
From: Brunswick Georgia
then you have a intermentent code 42, cause it would not start otherwise. manual does not say much about intermentent 42.
the H just means it went to history after you turned your ignition off.
sounds like you have checked connections. open or grounded connections can be very frustrating to find, especially if they are intermentent.
i use a magnifying glass to check wires and connections. also use electical lube on all connections after i clean them.
if you erase the code or it disappears, try to move around the wires after startup when someone is watching for engine light to illuminate.
i will search another area....
the H just means it went to history after you turned your ignition off.
sounds like you have checked connections. open or grounded connections can be very frustrating to find, especially if they are intermentent.
i use a magnifying glass to check wires and connections. also use electical lube on all connections after i clean them.
if you erase the code or it disappears, try to move around the wires after startup when someone is watching for engine light to illuminate.
i will search another area....
Thread Starter
Melting Slicks
Joined: Jul 2006
Posts: 2,151
Likes: 0
From: Strongsville Ohio
Thanks bud. I think it might be ICM wiring or around there. I had problems before the rebuild with my car burning them out. I hate to tear into the wiring but its cooling off so I will give it a shot. I just replaced the ICM connecter pigtail and nothing changed so I shall go deeper.
