2007 S80 won't start 300,304,305,306,087,628 codes Topic is solved

[Skymongrel]

Don't get too excited, this problem is resolved, all the details aren't here but this may help someone. I've been discussing this problem on a thread I hijacked about misfires. I got great support there and as a result I have more hair (since I stopped pulling it out).

My son's 2007 S80 broke down at a local fast food place. He had it towed to the nearest shop and they pulled these codes which basically are misfires and fuel delivery codes; 300,304,305,306,087,628. After a week and a half, Pep Boys still hadn't got the car running after replacing the fuel pump and module (PEM). I decided to pull the plug on having them go any further even though I think in hindsight they were on the right track (but seemed inclined to throw lots of parts at it).

Even though Pep Boys installed a new fuel pump, they didn't charge me a penny as they never got it running! They put the old PEM back in. Kudos to Pep Boys, I would do business with them again, they were very gracious about me having them stop work on the car ! They suggested the Volvo Dealership for more in depth analysis. When I tried to get an appointment, Volvo wouldn't service the car (too old). Volvo did recommend another shop that handle imports, to which I had the car towed to for repairs.

The car was there for one day when I got the call that it was fixed! What! Can't tell you how exciting THAT call was!

United Auto Foreign and Domestic, pulled two codes (don't know which ones as I took the call on a chair lift at our local ski resort and couldn't hear all the specifics.) I believe they said it was low fuel pressure (628) and level sensor codes (460). Their tech traced the problem down to a bad ground connection. I recall the bad ground connection was near the right rear C pillar by the back seat.

It cost me more for the tow than the repair! (although my son had a car rental for a week while car was at PB).

In short....the car began running very rough and immediately died and wouldn't start. It generated the misfire and fuel delivery codes. The fix was a faulty ground connection.

Hope this helps someone.

[abscate]

When I tried to get an appointment, Volvo wouldn't service the car (too old). Volvo did recommend another shop that handle imports, to which I had the car towed to for repairs.

I bet Volvo of North American would not be pleased to hear this report on a 2007 S80

[kevmcrae]

Skymongrel, I also have a 2007 S80. Can you tell me where the PEM is? It’s not in the right rear wheel well or under the back seat. Read it might be on top of the plastic fuel tank but have to remove a lot of items in order to lower the tank.