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2000 Nissan Maxima code PO171 lest bank to lean

Tiny
STEVIS
  • MEMBER
  • 2000 NISSAN MAXIMA
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 120,000 MILES
This car has what I would disccribe as a ignition ping when enging is at operating temp under acelleration or when engine is under a load. The code is po171 for 2 lean on bank 1. Any sugestions. Thanks Steve.
Monday, September 13th, 2010 AT 10:53 PM

1 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Hi Stevis, Welcome to 2carpros and TY for the donation

Pinging could be caused bu an engine overheating, knock sensor not retarding the ignition timing and an EGR valve not opening and increasing the combustion chamber temperature

P0171

Lean fuel condition could be caused by one of the following below:

1. Vacuum leaks
2. EGR and PCV valve.
3. Low fuel pressure.
4. Dirty fuel injectors.
5. Mass Air Flow Sensor.
6. Oxygen sensor
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Tuesday, September 14th, 2010 AT 12:33 AM

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