My 2004 S80 (2.9 normally aspirated) have an intermittent rough idle and codes P2179 and P0150.

I checked for vacuum leaks and cleaned the Mass air flow sensor and the throttle body with no success.

Any recommendations of what to do to correct?

Thanks in advance for you help!

 

Most likely an O2 sensor

Best advice I can give as a fellow S80 owner is to take it to a Volvo dealer, Vida will have a more extensive explanation of the error. While the diagnostic fee might be high, they will most likely find the issue first try versus spending money on the wrong parts.

 

Thanks Legofan-

I decided to roll the dice and replaced the bank 2 oxygen sensor. The wire to the connector was very difficult to reach. Check Engine light is off.

Fingers crossed!

 

Ah, cool, hopefully that did it.

Good luck!