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Software upgrade required with new MAF installation? S80 2000

posted by  someone claiming to be S80S80 on  Wed Aug 29 16:06 CST 2007 [RELATED]

Hi -

I just replaced the MAF sensor (also referred to by some as the AMM) on my 2000 2.9 S80. I replaced it because of a surging idle and CEL that was throwing codes p1171 and p1181. The car has about 96K on it.

The replacement seemed to do the trick - no more surging, CEL is off and no more codes. But, I've noticed a couple of things since replacing the part:

1. I'm getting an occasional clunking from the transmission upon acceleration that wasn't there before.

2. The throttle feels smoother and more consistent, but it also seems like the car has lost a bit of power.

My question - the part (bought from a local dealer) came with an orange paper in the box that stated new software must be downloaded with the new MAF (software is part number 9499307). I am going to get this done the next time I visit the dealer, but I was curious if not having the most up to date software might be causing these issues. Note - I have already had the ETM software upgrade performed (part number V030785453-9).

Thanks...






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