error codes..yep I got em'

[BigWaveDave]

Ok check engine light on and rough idle,fine upon acceleration.I went to Advance auto parts and let them run codes for me....This is what I got. Stored i got a P0171-left bank too lean.I also have a P0174-right bank too lean.Are these the O2 sensors everyone keeps talking about????I know you guys can help me..Oh and I got smoked by a newer firebird tonite He obviously wasnt stock though....

 

[JoeyLincolnMK8]

yes, those are the O2's. get them changed out and all should be well.

 

[mrzeee]

The O/E ones are a F5MZ-9F472-AA and list for 97.78 and LVC cost is $57.20 each plus ups.

Max

 

[fossten]

yes, those are the O2's. get them changed out and all should be well.

Hey Joey you ever get that brake check valve fixed?

 

[JoeyLincolnMK8]

The O/E ones are a F5MZ-9F472-AA and list for 97.78 and LVC cost is $57.20 each plus ups.

Max

Max,

I remember calling you for a quote on O2's. and you had 2 different part numbers for them. did this change or something? lol.

 

[JoeyLincolnMK8]

Hey Joey you ever get that brake check valve fixed?

no... not yet. i was tackling a very bad viberation at high speed issue for awhile. turned out to be bad rear drivers side hub and barring.

I may do the brake check valve this weekend or so... but i highly doubt it is going to be it. but, who knows...lol thanks for checking up on that w/ me!

 

[BigWaveDave]

thanks for the help guys...are they located on the exhaust manifolds......the upstream ones??

 

[Psychostang]

Before you go and change O2 sensors, go around the engine and check everywhere for vacuum leaks. If you have a vacuum leak that is out of the ocmputers tolerance, it will also give you those codes.

 

[Aquabrit]

no... not yet. i was tackling a very bad viberation at high speed issue for awhile. turned out to be bad rear drivers side hub and barring.

I may do the brake check valve this weekend or so... but i highly doubt it is going to be it. but, who knows...lol thanks for checking up on that w/ me!

Try the 'suck and blow test' on the check valve. You should be able to suck air out, but not blow air back in.

 

[chicken]

Before you go and change O2 sensors, go around the engine and check everywhere for vacuum leaks. If you have a vacuum leak that is out of the ocmputers tolerance, it will also give you those codes.

+2
99% of the time if you have BOTH banks lean its usually a vac leak, with the eng running spray brake clean around the intake manifold, and when the eng stumbles theres your leak. whats the likeliness of both sensors failing at the same time?

 

[fossten]

no... not yet. i was tackling a very bad viberation at high speed issue for awhile. turned out to be bad rear drivers side hub and barring.

I may do the brake check valve this weekend or so... but i highly doubt it is going to be it. but, who knows...lol thanks for checking up on that w/ me!

I wouldn't have believed it either, but you don't have to wait until this weekend. You can change it in about 30 seconds while you're sitting in the Autozone parking lot.

 

[papa bear]

if no vac leaks and it is the 02s ngk.com or ntk has the 02s cheap four wire with the right plug the stock ones has ngk or ntk printed on them