Bought a 2001 Volvo S80 T6 for my son. Engine light came on, while fuel tank nearly empty. Mechanic says throwing ECM 4308, Leak Detection Pump, so tested Evap system. I've read 4308 only means "major Evap leak", not necessarily the pump. Mechanic says that the Purge Valve is sticking, and "no response" from Pump. These two parts total $225 from Volvo if I buy them, the replacement looks simple enough, yet they want $500 labor to replace Valve and Pump and "update ECM". Does this make since? I've read to update the ECM software only takes 10 - 30 minutes. I'm assuming they've already checked Gas Cap, J-hose and other Evap hoses as part of the Evap test. What am I missing?
Country: United StatesMake: VolvoModel: S80 T6Year: 2001Engine: 2.8 liter turbo
Hello, I will try to help. That labor time is a bit much. Even at 100 dollars an hour, they are getting 5 hours labor to replace an EVAP valve, (which takes about 1/2 an hour tops) and a leak detection pump (Which takes about an hour tops real time). and performing a Software upgrade, (which you hook up the data link connector and click download and walk away for 20 minutes). So I believe that labor figure to be a little excessive. I'd say at the most your looking at 3 hours labor, that's being generous. It is very possible that both of those components have failed however, they both have a high failure rate. I would elect to do a total software upgrade first however. The ECM uses current draw to determine if a Leak Detection Pump is working correctly or not. And as the pump ages, they can draw more current and set the light. The new SW upgrade is suppose to compensate for that.
Thank you. So you reccomend a total software upgrade first, then see if it's still throwing the 4308 code, is that correct?
Also, is the "total software upgrade" different than an ECM update? Sounds like it's more comprehensive.
Yes that is correct, If the pump is just a little "tired" and drawing a little more amperage to work, then the new SW can take care of it. A total upgrade, upgrades ALL the modules. From ECM TCM SRS UEM BCM. A total upgrade completely upgrades all the modules. And doesn't cost any more labor or time to download. I would upgrade all the modules instead of just 1.
I've had 10 years of experience on the car line at 2 Volvo dealerships, Quality level Volvo tech.