2003 Infiniti G35 Code P0171 too lean

Tiny
HASALEH
  • MEMBER
  • 2003 INFINITI G35
  • 3.5L
  • V6
  • RWD
  • AUTOMATIC
  • 121,000 MILES
I have an 03 G35 sedan with check engine light code p0171 system running too lean. Car starts right up, but I feel it dose not start up as quick as it should be. Now the car or engine does feel little shaky when first start up on parked position. When driving no shakes only when put to neutral comes back a little. Also, when I add gas to the car the gas gauge didn't go up or change. No smoke or anything comes out of exhaust. Otherwise car drives strong with no idle or shutting problems.
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Thursday, October 1st, 2015 AT 12:52 PM

1 Reply

Tiny
CAR-MAN145
  • MECHANIC
  • 321 POSTS
Po171 is a lean o2 sensor 1 bank1. O2 sensor are made to fail lean so you mite have a bad O2 sensor. If it was a vacuum leak then both O2 sensors would lean sence only one is lean I would think it was a O2 sensor
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Thursday, October 1st, 2015 AT 3:50 PM

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