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You replaced a 02 sensor on 1998 dodge ram 1500 and cleared the codes and the check engine light came back on?
Wiki User
∙ 14y ago
tighten your gas cap, then leave the battery cables off over night and it should clear right up. if not, then your 02 sensors are bad......again. they go bad all the time. i bypassed mine with a sensor cause i live in the humid south and my ram runs lean because of this. if you live where it is cold then you maybe running rich. if an 02 sensor is off by.2% then it will cause a fault. correct air/fuel ratio is 14.1% and its nearly impossible to tune a fuel injection motor to those specs thus causing the 02 sensor to default
Wiki User
∙ 14y ago
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