|
This occurred at about 48,000 miles, on a 50k mile warranty. That's why I took matters into my own hands and bought the code checker and subscription to All-Data. I figured that I was going to need it sooner or later, and the dealer's inability to fix the problem convinced me that I should have these tools sooner.
Those two codes have pretty much the same causes, as listed in All-data:
-------------
Upper limit:
* intake air leakage
* exhaust system air leakage
* low fuel pressure
Lower limit:
* intake air leakage
* high fuel pressure
* leaking injectors
* defective mass air flow (MAF) sensor
* contaminated engine oil
* oil level too high
---------------
I suppose that any of these could damage something -- consistently too rich, for example, could melt down a catalytic converter -- so you'd be wise to pursue it.
BTW, I believe that I mis-spoke earlier when I implied that All-Data indicated that "replacing the mass air flow sensor was the top cause of this problem." All-Data did, in fact, tell me the major causes of this problem, but it was reports on this list that pointed to a defective MAF as the most common problem.
I'm also recalling one forum member stating that he was a Volvo mechanic and that he had "seen quite a few of those (MAF sensors) go at 50 to 60 thousand miles."
All-Data gives no instructions for replacing it, but only lists a part number, price -- 8670263 for my S70, $238 -- and a mere .3 hours of a mechanic's time. The MAF sensor is usually mounted on or near the air filter box on most cars. In other words, this repair should be a no-brainer, especially if a dealer mechanic should be able to do it in under 20 minutes.
Poke around for loose vaccuum hoses first, though. Good luck. Let us know how this works out.
--
James Rothe, '99 S70 T5M, http://www.monmouth.com/~rothe/carstuff.html#Volvo
|
