1999 Dodge Neon 1999 Dodge Neon - SCANNER CODE P0171

MAUEL

MEMBER
1999 DODGE NEON
4 CYL
2WD
AUTOMATIC
77,000 MILES

I HAVE AN OB 2 SCANNER AND I DID A DIAGNOSTIC ON MY 1999 DODGE NEON WHICH READS CODE P0171, "TIMING BELT SKIPS ONE OR TWO TEETH', MY QUESTION IS WILL THIS BE SOMETHING THAT WILL PREVENT MY VEHICLE FROM PASSING A SMOG CHECK?

Sunday, February 14th, 2010 AT 6:29 PM

1 Reply

RASMATAZ

MECHANIC
75,992 POSTS

P0171 Lean A/F mixture

* Low fuel pressure due to a weak pump or leaky fuel pressure regulator. (Use a fuel pressure gauge to check fuel pressure at idle)

* Dirty fuel injectors. (Try cleaning the injectors)

* Vacuum leaks at the intake manifold, vacuum hose connections or throttle body. (Use a vacuum gauge to check for low intake vacuum)

* Leaky EGR valve. (Check operation of EGR valve)

* Leaky PCV Valve or hose. (Check valve and hose connections)

* Dirty or defective Mass Airflow Sensor (MAF). (Try cleaning the MAF sensor wires or filament with aerosol electronics cleaner. Do NOT use anything else to clean the sensor, and do not touch the sensor wires)

Check engine light coming on might cause you to fail the test-