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Check Engine Light 700 1990

posted by  Brick Skinner on  Thu Jan 13 09:44 CST 2005
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last visit: Fri Jun 13 13:31 CST 2014
[RELATED]

1990 740GL
I have checked every sensor and cleared the error codes several times but still can't keep the Light from coming on after engine warmup. Error codes are 3-2-1, 2-2-1, and 2-3-3. The exhaust is very rich and the O2 sensor remains at 0V after doing some hunting around .5V during warmup. Could it still be the O2 sensor?





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