hitz Posted November 11, 2006 Share Posted November 11, 2006 im working on a 4-dr automatic 1990 civic lx. my check engine light has been going on, either when im going uphill or trying to accelerate quickly. i checked for what the error code was and it was a single flash....o2 sensor (if the manual im using is correct). i dont notice any change in performance and the lightt resets whenever i turn the car off..... stays off until i go uphill or until i bury the accelerator. i dont know if its true but ive been told that the light usually stays on until it is reset. so is it a bad ecu or is my o2 sensor bad. any help would be appreciated Link to comment Share on other sites More sharing options...
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