Question about Oldsmobile Cutlass Supreme

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I have a 93 cutlass supreme with about 14 different codes that come back right after they are cleared.36 IG 24xsignal error,41 est line error,42 by pass line error,14coolant temp signal low or short,15coolant temp signal high or open,33map senor circuit to high,34map senor circuit to low,51 ecm prom error,96 trans system voltage low, 82ignition control 3xsignal error,79 trans temp to hot,80trans component slipping.I replaced pcm and prom to see if codes would come back and they did.The car runs fine except for a shifting problem in first and second gear(hesitation).

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  • jvanesk Feb 04, 2010

    i replaced with two other computers so i know thats not the problem

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Generally when you get high votage signal codes it means you most likely lost the ground side or the signal side of connector. I would be making sure all your battery and engine to body grounds are clean and tight.

Posted on Feb 04, 2010

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Thats is a sure sign of a faulty computer. when you have that many codes and they come right back and the areas of those codes are not faulty your computer is bad. please ask any more question you have.

Posted on Feb 04, 2010

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Engine stalls driving down the road or on take off. Had code 42. electronic spark tining. E S T circiut fault. Cleared codes and installed a fuel pressure gauge. On test drive the motor, (3.1 EFI) still...


Trouble Code 42 indicates that there may be a malfunction in the Electronic Spark Timing (EST) system. During cranking, the timing is controlled by the ignition module and the ECM grounds the EST line. It expects to see no activity on this line at this time. When the ECM enters EST mode, it applies +5 volts to the BYPASS line and expects to see voltage variations on the EST line.
Reasons for the ECM to set Code 42:
1. System in BYPASS mode (i.e. EST line supposedly grounded) but activity sensed on EST line
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Possible causes include:
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