DTC P0139, P0159: Notes
DTC P0139 : Rear Secondary Heated Oxygen Sensor (Secondary HO2S (Bank 1, Sensor 2)) Slow Response DTC P0159 : Front Secondary Heated Oxygen Sensor (Secondary HO2S (Bank 2, Sensor 2)) Slow Response
NOTICE:
Before you troubleshoot, review the How to Troubleshoot .
NOTE: If there are leaks from the exhaust system, this DTC will be set. Check for damage in the exhaust pipe and repair it if needed.