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Discussion Starter · #1 ·
I have a 2005 Accord LX (104K miles). It gave a check engine P0140 (read O2 sensor in/near the catalytic convertor). After having it replaced at an Emission Repair Facility (ERF) here in NJ, the check engine light it now throws a P0139 (slow to respond).

I can take it back to the ERF but I am not sure what the next expected steps are. The sensor is brand new - could it have been not put in properly ? Or could the problem be somewhere else

Any insight would be welcome

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