OK - I fixed the problem - I replaced the fuel pressure sensor at the end of the rail. No more errors, Here is a good "how to" video on YouTube.



Thanks for the thought provoking ideas... will advise if things change.

Thanks for the insight. By the way, the car has 137,000 miles

This is my first Volvo - the car mostly runs fine but recently has started (on occasion idling rough) and on occasion experiencing a loss of power when accelerating. On occasion Idle feels a little rough but the tach. is constant and steady. Not fluctuating.

I cleared my error codes, drove for 10 ...