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maintenence codes p0171 and p0174

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Old 07-09-2010, 07:57 AM
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Default maintenence codes p0171 and p0174

Stalling out when starting on occasion. Not all the time. Any ideas?
 
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Old 07-09-2010, 09:35 AM
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Read the diagnostic procedures for both these codes in the Diagnostic Trouble Codes (DTCs) section and then get back with us for more help, if needed.
 
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Old 07-17-2010, 08:21 PM
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think i found problem. PCV valve wasn't even plugged in, just dangling there. Put new valve in and seems to be OK.

This vehicle was just bought a couple of weeks ago so i have no idea how long it has been like that. Will this cause any damage to anything else with it running around like that?

The system maintenence light is still on. Is that common? Guess i should put it back on the computer.
 
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Old 07-17-2010, 08:24 PM
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If the PCV valve was pulling in outside air unseen by the MAF sensor, it could cause the lean codes.
 
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