Tech / General EngineIs your car making a strange sound or won't start? Thinking of adding power with a new combination? Need other technical information or engine specific advice? Don't see another board for your problem? Post it here!
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For a while now my service engine soon light will come on, somedays its off and stays off, other days will come on and back off multiple times, and sometimes it will stay on for a few days. Anyway i figured out how to do the paperclip test to get the codes. I believe it gave me 22,33,42,44. The thing is there a noticable difference in performace when the light is on as compared to it being off so which one of those codes is causing it? I looked up what they were and i suspect it may be 44 cause its related to the 02 sensor but will that cause a performace drop when the light comes on?
22 - TPS voltage was under 0.2 volts for 3 seconds when the engine was running.
33 - MAP sensor signal voltage was too high (low vacuum) for 1 second when throttle opening was under 2%.
42 - The EST signal did not change when the ECM applied bypass voltage to the ignition module.
44 - Oxygen sensor voltage was under 0.2 volts for 50 seconds of closed loop operation.
__________________ 1989 Trans am GTA 5.7
1986 IROC-Z 5.0 tpi (sold)
Last edited by IroczCamar0; 07-25-2009 at 11:32 PM.
Reason: information left out
Any of them can cause a performance issue. No telling how long the codes have been stored either. Best thing - remove battery cable for 2 minutes to clear the codes, then drive. First time SES light comes on, immediately pull over, get the code, and look into that issue. Then go from there.
