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Check Engine Light


I recently changed my exhaust on my 07 Classic and the check engine light comes on after about three minutes. I changed them to true duals. The code that I keep getting is P0154 Rear 02 sensor open/not responding. Any ideas on fixing this?
If the wiring and plugs are OK you may have to replace the 02 sensor. If you reused the sensors in the replacement pipes, it may have been damaged when you swapped them to the new pipes.

Look over the connections to make sure everything is plugged in properly.