Question about 1996 Toyota Tacoma
258k KM failed e-test high co 2x limit and hc almost passed but nox ok was told from a tec the cat would prob be worn out what about o2 sen?
engine light has come on and went away several times but no codes in the computer
have you had the the engine codes pulled and reset?
and if so what are your engine codes?
i dont know of any car that will pass emissions test with the engine light on.
we cure your trouble that caused your engine light to come on and you will pass your test.
Posted on Nov 24, 2008
running too rich, probable causes spark plugs, pcv valve malfunction, leaking injectors, vacuum leak, catalytic convertor, o2 sensor,
Posted on May 12, 2010
This is a system too lean code, and in most cases can be directly related to spark plug replacement. After the sensor was replaced, did you try to disconnect the battery NEGATIVE lead for about 30 seconds? Low fuel pressure could also cause this issue. I'm assuming there are no vacuum leaks and the engine is running fine otherwise. Sometimes after market O2 sensors will cause the light to come on again, and over time, it will go off.
Posted on Jan 09, 2011
Two things... check your oxygen sensor - or just replace it. Have you ever had the check engine light come on while the cruise is on at highway speed? jumper the error check terminals and see if you have any check engine codes showing. Also, see if someone removed the catalytic converter - or get a new one.
Posted on Oct 09, 2011
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