Codes what are they
kclovesken
11-16-2005, 02:02 PM
I have codes p0171 and p0174 they say system to lean. Help please :0(
vicv
11-16-2005, 09:06 PM
That's as good as it gets with the codes. You're gonna have to check stuff. Here's a list of possible causes.
Fuel System:
· Contaminated fuel injectors
· Low fuel pressure or running out of fuel (fuel pump, filter, fuel supply line restrictions)
· Vapor recovery system (VMV)
Induction System:
· MAF contamination
· Air leaks between the MAF and throttle body
· Vacuum leaks
· PCV system concern
· Improperly seated engine oil dipstick
EGR System:
· Leaking gasket
· Stuck EGR valve
· Leaking diaphragm or EVR
Base Engine:
· Exhaust leaks before or near the HO2S
· Secondary air concern
Powertrain Control System:
· PCM concern
Since both sides (banks) of the engine are showing lean check for leaks in the intake system or a vacuum line, Dirty MAF sensor, something that affects both banks of the engine.
Fuel System:
· Contaminated fuel injectors
· Low fuel pressure or running out of fuel (fuel pump, filter, fuel supply line restrictions)
· Vapor recovery system (VMV)
Induction System:
· MAF contamination
· Air leaks between the MAF and throttle body
· Vacuum leaks
· PCV system concern
· Improperly seated engine oil dipstick
EGR System:
· Leaking gasket
· Stuck EGR valve
· Leaking diaphragm or EVR
Base Engine:
· Exhaust leaks before or near the HO2S
· Secondary air concern
Powertrain Control System:
· PCM concern
Since both sides (banks) of the engine are showing lean check for leaks in the intake system or a vacuum line, Dirty MAF sensor, something that affects both banks of the engine.
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