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AF ECU.... Will one from a 1998 cavalier work on a 1999???? Please let me know....

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  • AF ECU.... Will one from a 1998 cavalier work on a 1999???? Please let me know....

    AF ECU.... Will one from a 1998 cavalier work on a 1999???? Please let me know....

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    Re: AF ECU.... Will one from a 1998 cavalier work on a 1999???? Please let me know...

    No, it will not. The '98 AF ECU was not OBD II compliant as were the '99 through "02 models. You could try it, however it could not be re-flashed for your vehicle if it was necessary. Being in Utah this could be a real problem during emission tests. Although they may report some parameters wrong as far as the scan tool is concerned, '99 thru '01 AF ECU's should work without a re-flash and provide readiness test data. The '02 AF ECU would also work but would need to be re-flashed as the PCM design was changed in 2002. '03 and later Cavaliers did not use a AF ECU.

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