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P0171 and p0174 both banks lean

(2000 Saturn LS2)
in Winter Park, FL on August 08, 2010
hello i live in florida temp is 98 degrees and humity is 100%.i clear the code and car is running good it doe's not come up all the time.can it be cause by high humity.
thank you
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Popular Answer
on August 13, 2010
I don't think it would be a humidity problem. Otherwise cars in FL, VA, GA, or LA would never run. HAHA!

Found on the OBD Codes web site.

"Codes P0171 and P0174 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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