So, my wifes 05 XC with 75k on the clock has an issue.
Back in December I was driving the car. It was 25-30deg. I came out of the store & the car started ok, but I noticed the headlights & int light was fluctuating (diming slightly). Car ran ok, within 5 miles my CEL came on, car still ran ok. Message was check engine management syst.
Took it to my independent Volvo mech & he reset the code, but he said the code didn't say exactly what it was?
So a couple of weeks go by & one really cold 0 deg night the light comes on again & I drive it home. The lights seem to be diming again. It seems as thought the idle is low & fluctuating around 600 rpm.
I park the car in the driveway & go out a while later to start it & it's dead.
I jump it & it starts, of course the light is still on.
Back to the shop. Battery is orig; so we through a new one in & reset code.
Car runs fine for 3-4 weeks & then the light comes on again, no fluctuating lights.
Shop determines it's the air mass meter, $375 later & on our way.
A week later the light comes on again. Shop checks it out & finds a vacum hose under the manifold had a crack in it? $25 charge.
So, a month or so later (last weekend) I'm coming back from a road trip. Tooling down a long hill, 50deg, & the CEL comes on again. Stop at drive though coffee & idle is low again. Just under 1/2 tank of gas. Car is running OK otherwise, so continue 200 miles home.
Stop at shop on way home & they read the code, fuel code or something like that, supposidly not the same as the air mass code.
He says to use major brand fuel, I was using local independent + fuel. I had filled up after the light came on with Sunoco ++.
2 days later & CEL again! Shop replaces air mass & light stays off for 2 hrs; back on..
What the heck?
I have been using this shop for 10+ years & has always been good. I purch the car from him with 50k & this is the first issue I have had.
So, scheduled to go into shop this Weds.
p.s. could a voltage fluct be causing this? I haven't had any battery/charging issues, diming lights, but it's been warm.
Sorry I don't have more info on the specific codes, but it always says check engine management system.
Any thoughts woudl be apprec.
