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Old 07-02-2012, 03:10 PM   #1
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CEL

Got these codes P0171 and P0174 any ideas what's causing it to run lean?
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Old 07-02-2012, 03:14 PM   #2
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Re: CEL

Vacuum leak or gasket leak since both are flashing up...if it was just one or the other id say either leak or faulty sensor
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Old 07-02-2012, 03:17 PM   #3
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Quote:
Originally Posted by 1slosix
Vacuum leak or gasket leak since both are flashing up...if it was just one or the other id say either leak or faulty sensor
That's my thought cuz the intake manifold just got replaced.
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Old 07-02-2012, 03:21 PM   #4
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Re: CEL

Id check the gasket ...or was this code flashing before the replacement happened? Did your old intake crack?
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Old 07-02-2012, 03:24 PM   #5
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Originally Posted by 1slosix
Id check the gasket ...or was this code flashing before the replacement happened? Did your old intake crack?
Yes my old one cracked. The light came on like 75 miles after putting the new one on.
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Old 07-02-2012, 03:30 PM   #6
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Re: CEL

Hmm if it cracked between drive cycles that can explain away the delayed light. Pull the battery for 15 minutes to reset the live data....drive it and see if the lights comes on and stays on after about 75 miles. If it does have it retested and see if the code is the same or shifted
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Old 07-02-2012, 05:50 PM   #7
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Ima vacuum test it tommorrw and go from there.
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