Intermittent Check Engine Light
jgardner72
04-02-2004, 01:57 AM
1994 325i. 172,000.
New plugs, new O2 sensor, fairly new air filter.
After replacing O2 sensor, all was fine for a couple of months -- good mileage, etc.
Recently, the check engine light started to come on only when driving in the city. When revving the motor or driving on the highway, the light clears.
I have initiated the diagnostic program (step on the gas pedal 5x when key in position 2) and it only reports the O2 sensor.
What could be causing this???
New plugs, new O2 sensor, fairly new air filter.
After replacing O2 sensor, all was fine for a couple of months -- good mileage, etc.
Recently, the check engine light started to come on only when driving in the city. When revving the motor or driving on the highway, the light clears.
I have initiated the diagnostic program (step on the gas pedal 5x when key in position 2) and it only reports the O2 sensor.
What could be causing this???
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