The check engine comes on sometimes when trying to start. i replaced the o2 sen.
1990 Toyota Camry

The check engine comes on sometimes when trying to start. I replaced the O2 sen.

(1990 Toyota Camry)
I replaced the o2 sensor and the it starts OK. However, after a day or so it start doing the same thing. Hesitate to start with the check engine lite coming on ant then goes off after the car warms up. I replace the plugs, but the same problem re-occurs. When I took off the o2 sensor and clean it with a dry cloth the car starts O.K.
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Popular Answer
on December 30, 2016
There are 'many reasons' why the check engine light is turning on! .. The diagnostic link connector under the hood can be jumpered so flash codes can be gathered .. It would be best to find a car savvy friend or local repair shop that can do this for you .. That way it can be determined WHY the check engine light is turning on while the engine is running instead of guessing at it.
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Check Engine Light Diagnosis
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on December 30, 2016
There are 'many reasons' why the check engine light is turning on! .. The diagnostic link connector under the hood can be jumpered so flash codes can be gathered .. It would be best to find a car savvy friend or local repair shop that can do this for you .. That way it can be determined WHY the check engine light is turning on while the engine is running instead of guessing at it.
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