All Other Makes All Other Models OBD1 Codes Code 21

Browse All Other Makes All Other Models OBD1 Codes Code 21 questions and answers. Choose a question that matches your symptoms.

1 discussion

1991 4 Runner V6 3.0 Code 21 O2Sensor

1991 ALL OTHER MAKES ALL OTHER MODELS
I've Had Problems With Valves Burning On This Engine In The Past. It Has 215,000 Miles And Recent Valve Job (15k Ago). Getting A Code 21...
2 ANSWERS
Asked by Jerry Joe

Browse other repair topics

Browse by repair topic
Code 21Code 30Code 41Code 42

    Can’t find your issue?

    Ask a new All Other Makes All Other Models question