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2001 Camry P1135 Cause
Sorry in advance for the long post.
My check engine light in my 2001 Camry 4cyl recently came on with code P1135. Google shows that this is usually a faulty sensor. However, I noticed on some posts ...
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How do I resolve error code P1135 in my Toyota Camry?
I recently replaced the downstream O2 sensor in my Toyota Camry. Shortly thereafter, the check engine like came on again providing the following codes:
P1135 which I understand to be the upstream ...
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