Throwing codes 34 and 42 ???
Thread Starter
Drifting
Joined: Jul 2001
Posts: 1,595
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From: Chino Valley AZ
Throwing codes 34 and 42 ???
Hello and goodmorning all!! Well I have my engine running, exhaust back on and life is good. NOT! :( As soon as the engine starts, my service engine soon light comes on. I check the codes and there are two, 34 and 42. My questions are these:
1. The book says the Manifold Absolute Presure sensor is located on the left rear of the intake manifold. I do not see this sensor and would like to know if anyone can describe this sensor or better yet, have a clear picture of it installed.
2. As for code 42, It tells me the the ECM needs to be replaced. Where is that? There is no information in this book that tells me. Or that I can find if it is.
Thank you all once again. By the way I have an early 1986 coupe.
1. The book says the Manifold Absolute Presure sensor is located on the left rear of the intake manifold. I do not see this sensor and would like to know if anyone can describe this sensor or better yet, have a clear picture of it installed.
2. As for code 42, It tells me the the ECM needs to be replaced. Where is that? There is no information in this book that tells me. Or that I can find if it is.
Thank you all once again. By the way I have an early 1986 coupe.
Le Mans Master
Joined: Jan 2002
Posts: 5,320
Likes: 4
From: Kyle TX (Because Mojo Made me fill it in)
Re: Throwing codes 34 and 42 ??? (PonyH8R)
You dont have a MAP sensor. Those didnt start until 90 I believe.
Code: 34 (1985-1990) Clean the throttle body. Check MAF connections. Replace MAF relay. Replace MAF Sensor. Possible ECM failure.
Code: 42 Check wiring at ignition module. Replace ignition module. Possible ECM failure.
[Modified by VetteNoob, 10:45 AM 8/11/2002]
Code: 34 (1985-1990) Clean the throttle body. Check MAF connections. Replace MAF relay. Replace MAF Sensor. Possible ECM failure.
Code: 42 Check wiring at ignition module. Replace ignition module. Possible ECM failure.
[Modified by VetteNoob, 10:45 AM 8/11/2002]
