CEL is ON again...
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Been Around A Long Time Member
Joined: Jan 2008
Posts: 2,328
From: Eugene, Oregon
i think the maf could be dirty, might clean that, theres no vacuum leaks and the filter is less the a month old,
any suggestions to clean the maf it said electronic dust cleaners, or brake cleaner.
any suggestions to clean the maf it said electronic dust cleaners, or brake cleaner.
Been Around A Long Time Member
Joined: Jun 2007
Posts: 7,381
From: St. Paul, MN
Anything that evaporates quickly and leaves no residue aka brake cleaner.
P0171 - System Too Lean (Bank 1)
A code P0171 may mean that one or more of the following has happened:
Possible solutions include:
P0171 - System Too Lean (Bank 1)
A code P0171 may mean that one or more of the following has happened:
- The MAF (Mass Air Flow) Sensor is dirty or faulty. Note: The use of "oiled" air filters may cause the MAF to become dirty if the filter is over-oiled. There is also an issue with some vehicles where the MAF sensors leak the silicone potting material used to protect the circuitry.
- There could be a vacuum leak downstream of the MAF sensor.
Possible solutions include:
- In the vast majority of cases, simply cleaning the MAF sensor does the trick. Consult your service manual for it's location if you need help. I find it's best to take it off and spray it with electronics cleaner or brake cleaner. Make sure you are careful not to damage the MAF sensor, and make sure it's dry before reinstalling
- Inspect all vacuum and PCV hoses, replace if necessary
- Check for a dirty fuel filter and proper fuel pressure
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