2001 Buick Lesabre Service Engine CODES

JCN

MEMBER
2001 BUICK LESABRE

Computer problem
2001 Buick Lesabre 6 cyl Two Wheel Drive Automatic

Codes indicated Catalytic Converter failure. I replaced the converter and the computer registers NO codes. Mechanic says computer is cycling through codes. Every time reset computer but service engine soon light comes on again. Mechanic disconnected computer then plugged back. No change. Light stays off for only 2-3 miles then returns showing NO codes. Please help.

1 Reply

WRENCHTECH

MECHANIC
20,761 POSTS

You might want to try another scan tool just in case but if that is really true, it would mean that either there is an overcharging condition that doesn't set a code or the PCM itself is bad.

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Sunday, October 24th, 2010 AT 5:52 PM