MPG computer screwy after exhaust welding.
#16
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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.
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.
#17
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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!
#19
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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.
#20
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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?
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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?
#22
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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.
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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.
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