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Old Oct 18, 2007, 08:10 PM   #1
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Drives: Chevy Lumuna,Venture, EVO VIII
Trouble code po172
2003 Evo
system too rich bank 1 Any ideas ? Mass air flow sensor, oxy, etc. Thanks
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Old Oct 18, 2007, 08:17 PM   #2
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Quote:
Originally Posted by Ironwolf View Post
2003 Evo
system too rich bank 1 Any ideas ? Mass air flow sensor, oxy, etc. Thanks
Yes and Yes,could be either one.If you have a scan tool just see what the o2 sensor (bank 1 sensor 1) is reading for voltage.If that is ok then see what the MAF is reading.
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Old Oct 19, 2007, 03:31 AM   #3
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Drives: Chevy Lumuna,Venture, EVO VIII
Test
My laptop described the fault.
Long Term fuel trim bank one neg -12.48 %
Short term fuel trim bank one pos 94.38%

What are the normal voltage readings. Thanks
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