Codes and what to do about them.
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Joined: Dec 2006
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Car: 1987 IROC-Z Z-28 Camaro
Engine: 305 TPI V8
Transmission: Auto
Codes and what to do about them.
Hey I've got an 87 Iroc and recently it has been setting the 22, 33, 36, and the 42 codes. I believe that the 32 is the MAF and the 42 is the left O2 sensor. Can anyone help?
Joined: Aug 1999
Posts: 5,266
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From: RI
Car: 1984 Camaro Berlinetta
Engine: LT1
Transmission: T56 6-speed
Axle/Gears: 4.11 LS1 Rear End
Re: Codes and what to do about them.
22 = TPS ( voltage Low )
33 = MAF Sensor ( Voltage to HIGH )
34 = MAF sensor ( Voltage to LOW )
42 = EST ( Electronic Spark Timing ) System
WAY to much to diagnose over a message board right now ! Best Advise I can give you is to unplug the ECM ( disconnect the battery) and let the ECM re-set itself. While it's unplugged examine the engine bay for obvious problems. Disconnect and re-connect the TPS, EST, and MAF sensor wiring,..... then reconnect the ECM ( battery ) and start the car. Let it warm up for 10 minutes then take it for a ride. Once you get back check the codes again.
Then start searching this site for the ECM codes you are still getting for most of your answers !
33 = MAF Sensor ( Voltage to HIGH )
34 = MAF sensor ( Voltage to LOW )
42 = EST ( Electronic Spark Timing ) System
WAY to much to diagnose over a message board right now ! Best Advise I can give you is to unplug the ECM ( disconnect the battery) and let the ECM re-set itself. While it's unplugged examine the engine bay for obvious problems. Disconnect and re-connect the TPS, EST, and MAF sensor wiring,..... then reconnect the ECM ( battery ) and start the car. Let it warm up for 10 minutes then take it for a ride. Once you get back check the codes again.
Then start searching this site for the ECM codes you are still getting for most of your answers !
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