1999 Dodge Neon 1999 DODGE NEON - SCANNER CODE P0171

1999 DODGE NEON
77,000 MILES • 4 CYL • 2WD • AUTOMATIC
Avatar
MAUEL
  • MEMBER
  • 1 POST
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?
Feb 14, 2010 at 6:29 PM
Advertisement
Avatar
RASMATAZ
  • ✓ASE Certified Mechanic
  • 75,992 POSTS
  • ASE Certified Mechanic
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-
Feb 15, 2010 at 4:09 AM
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.
Ask a Free Question
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.