2006 grand marquis,cannot clear readiness monitors for 02 sensor and heaters. Car runs very well and has no engine codes. Just cannot get through NJ state inspections. Car has a shift kit, dual exhaust and I have run the drive cycle instructions and still will not clear for insection. Any Ideas?

Asked by vtwinp Apr 24, 2018 at 01:22 PM about the 2006 Mercury Grand Marquis LS Premium

Question type: Maintenance & Repair

2 Answers

Thanks for your help. Wouldn't my check engine light be on? I have no codes, just an issue at motor vehicle. I think this car may have 4 02 sensors, How can I isolate where the bad is located

OK, seem to be stuck on this issue, all four o2 sensors have been changed and I have driven over 500 miles and still cant pass the readiness issues for state NJ inspection. Can anyone else provide suggestions?

Your Answer:

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