speltier

Well, B2S1 reads correct resistance. Its too cold to check the IAT resistance on the MAF. I'm hoping that fixing the exhaust leak(s) and a fresh MAF will clear up the issues.

The hard part is waiting on the mail. I guess i should start plotting the removal of that broken stud at the O2S. I DO NOT wanna have to replace that pipe.

speltier

Well, I had the front pipe, with the Flex connection, replaced this morning, and replaced the MAF this afternoon. I haven't test driven it yet, but no codes are showing up. I think I fixed it! Thanks for your help, I appreciate it!

Baetke

Happy to help. Please check back after you have completed a couple of drive cycles to verify that it is really fixed.

speltier

well, I took it for a test drive. P 0171 is the only code that came back. I know there's a air /fuel ratio sensor specific code, but is it possible that I have a defective sensor, anyway? I will look again for intake leaks. At least I got the P 0174 and the P 0125 to go away.

Baetke

Download a copy of the diagnostics pdf posted by Bobster999 and search for P0171. It will tell you the conditions for setting that code and possible causes. Did you reset your ECU before the test drive? Do you have the ability to download freeze frame data or monitor your short and long term fuel trim values in real time?

speltier

I pulled the efi fuse. My monitor is capable of that. I was seeing minimal trim values for bank two and around -9 for bank one. The pid for evap and o2s read inc(omplete), fwiw.

Baetke

Sounds a like a couple more drive cycles are in order. That should give the other readiness tests time to complete. Some of them require multiple drive cycles to complete their tests and report good or bad. Still curious about the bank 1 trim number. Is that the short term or long term number. You really have to add them both together to get the actual trim number but the individual numbers tell you more about what has been going on. If you can give both and the freeze frame data that would be helpful. If you reset the ECU then the long term numbers should start out at zero and gradually approach the average short term number. Any short term number in the +/- 20% range would be normal.

speltier

There it is. P1150, and the p0125 again. One tricky afr sensor and i should be good.

speltier

Ok, replaced b2s1, at which point a code for b1s1 came up. Replaced b1s1. That SHOULD do it, but I'll report back. with two people and a gooseneck wrench, b1s1 was a snap.

speltier

Replaced both A/F sensors, O2 sensor and MAF. No codes! VSC and CEL lights are out. Spoiler install went well. Done!

Baetke

Congratulations. Thanks for checking back in with your successful results.
Baetke