Code P1171

[Jolly Roger VX'er]

Oh, and many thanks to Tone for the PDF! Invaluable info for all!

Jolly Roger VX'er, so based on your experience, changing the 02 sensor cleared both codes?

Am I correct in thinking the 2nd sensor in both banks is the post cat?

Best,

no...i never had to fool with the oxygen sensors. I just had to try cleaning the MAF...then when it didn't help...I replaced the MAF.

My MAF turned out to be bad so cleaning didn't help. But, at $150 for a MAF..why not try cleaning it first using some CRC MAF spray for like $4.

It was explained to me that sometimes a "real" problem will spawn some other codes that really are not the problem.

In this case..the "real" problem was the MAF sensor....which spawned a "false" code of P0157 too.

[snowtrooper1966]

Got it!
You replaced the MAF after cleaning did not clear the codes.
That throws a curve in my plans. 150 for a MAF (if cleaning does not do it) or 50 to 100 for 2 oxygen sensors....
What milage where you at when this happened?

[Jolly Roger VX'er]

Got it!
You replaced the MAF after cleaning did not clear the codes.
That throws a curve in my plans. 150 for a MAF (if cleaning does not do it) or 50 to 100 for 2 oxygen sensors....
What milage where you at when this happened?

I'd say to the best of my memory it was around 40,000 miles. I remember getting my Supercharger on at 36,000 miles and it was about a few months later that I started having this problem.

[snowtrooper1966]

Nice!
I Will clean the MAF tomorrow and see what happens...

[Tone]

Uh, if you are getting O2 codes as well then it is probably those and not the MAF. Any OTHER info? The whole story really helps give you a complete diagnosis instead of a bunch of WAGs thrown in by those who have had some of the problems you mention....

[snowtrooper1966]

As far as I can tell, there are no performance issues. Nothing to indicate trouble besides the codes.
IIRC, these codes appeared after I had been driving around with way too much oil in my Dragon, a result of not getting good readings off my dipstick and fear of excessive oil burn.
The thought was I may have fouled the sensors, but it has been some time, and I am still getting the codes....
Best,

[Jolly Roger VX'er]

I'd still clean the MAF first & see if that cures your problem. Easy, cheap & quick to try. If that fails...let us know what you end up doing and how it all turns out!