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shawndon
Guest
Ford Explorer? I had check engine light issues. Originally, I did a tune up. Then it came back on and the diagnosis indicated its the o2 sensors. I changed them. It came back on again. Had Ford do a full diagnosis, said those o2 sensors are wrong that wiring was modified and basically need Ford factory sensors. I ask two other mechanics including the one who changed them and both said after they re-diagnosis it all the values on the diagnostic, not just o2 sensor related read out, were oddly unreadable/-zero which could only mean its more than o2 issues and Ford is probably trying to sell the idea that under Ford standards of repairs must be their product not after market. My question, assuming the o2 sensors aren't defect could the next issue be the pcm or is Ford being genuinely correct with this diagnosis?