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Old 08-29-2011, 06:45 PM   #2
Brian R.
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Re: P1071 Error Code

It is likely that you misread it and it is P0171. That is a common code for that engine

System too Lean (Bank 1)

Possible Problems
When the air fuel ratio feedback is stable after engine warming up, the fuel trim is considerably in error on the LEAN side (2 trip detection logic)

Air intake hose loose
Fuel line pressure low (may be from running out of gas)
Injector blockage
HO2 sensor malfuction
MAF meter or MAP sensor malfunction
Engine coolant temperature sensor malfunction

Clean MAF meter with electronic circuit cleaner or replace<= most likely
Fix vacuum/intake leak downstream of MAF meter
Inspect fuel lines for cracks, leaks, or pinches
Replace fuel filter
Check fuel pressure at the fuel rail
Check output of HO2 sensor
Check injector performance
Check ECT sensor
Check PCV valve and hose fittings for tightness

Most likely problem is dirty or contaminated MAF sensor.
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