1996 - 850 Turbo Sedan - Check Engine Light Question - Larry

Aug 10, 2003 1 Replies
L

My check engine light has come on two times in the past couple of weeks. Both times the code was "front oxygen sensor". After the first time, the dealer reset the codes; I drove the car for a few days .... maybe 50 miles and the check engine light came back on. Had code read and reset at Autozone today. So far light has not come back on.



Question: Is it likely the front O2 sensor is failing, or could there be some other cause? Car runs fine with no apparent problems when check engine light came on both times.



Thanks, .... Larry


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M

Vacuum leaks can cause front sensor codes, as can leaks in the exhaust before the sensor (cracked exhaust manifold). However, the usual cause is the sensor itself. Look for vacuum leaks, especially at the rubber elbow on the end of the intake manifold by the power steering pump, and under the throttle pulley cover.

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