ajg617

Wife's 05 A4 3.0L keeps getting p1179 and p0175, this time with the latter setting the MIL on. These codes have been recurring for months and the car has been to the dealer 3 times with them, but they were always secondary codes not setting the MIL on. Previous culprit was the Coolant Temp Sensor setting the MIL. With the CTS changed, now P0175 is setting it. Doing a search, I'm not coming up with much for this pair of codes.

Gas mileage has been under 20 for a while which is low for that car. I should say the last time in the shop, there were 4 codes for Bank 1 and Bank 2 (1129, 1127, 0175, 0172). And it says Intermittent for all.

ltooz_a6_a8_q7

The MAF is not expensive and easy to replace. It will save you tons of grief due to incompetent technicians. Check my signature for how to replace the MAF.

The reason I replaced the MAF because all these codes showing up randomly across 6 cylinders.
My sister now haven't called me for months after the MAF replacement.

Cheers,

Louis

ajg617

Thanks Louis - it's easier than I thought. Is it the electronics that causes problems or contamination? I also have an 03 A6 3.0L with 213K on it and constant misfire codes but you can't feel them when driving. That's been going on for two years or more and the fuel mileage on that has dropped a lot. I figured it was just getting old but now I'm wondering if it is also suffering from a failing MAF.

Do these things fail frequently?
Thanks,
John

ltooz_a6_a8_q7

up when you start the car and stop right away, it will throw the codes.
I changed my MAF on my A8 when it ran rough and stopped at the light @175k miles.
98 A8 D2 MAF (Mass Air Flow) Problems - AudiAudi
Check the vacuum hoses under the manifold...
Fix Engine Rough Idle, Stall At Stops, Sluggish Acceleration - AudiAudi
Clean the butterfly
A8 Tune up - AudiAudi

Cheers,

Louis