Trouble Codes: P0174 & P0171

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06-29-2011, 03:34 PM

dailybeast

1st Gear

Thread Starter

Join Date: May 2011

Location: Phoenix, AZ

Posts: 32

Trouble Codes: P0174 & P0171

Idle Bank Lean Codes. Any thoughts on where to begin the diagnosis to repair the problem?

Thank you!

06-30-2011, 09:58 AM

McGovs2.7TB5

3rd Gear

Join Date: Jul 2007

Location: Denver, Colorado

Posts: 1,950

Run a search using the codes to find more info, but from my experience p0171 was a bad MAF. That code can be tripped by a number of things.

06-30-2011, 10:07 AM

TTQ2K2

1st Gear

Join Date: Jun 2010

Location: North Dallas suburb

Posts: 233

http://wiki.ross-tech.com/wiki/index...ry:Fault_Codes

breakdown of codes and possible resolution here. ^^^^.

cheers

06-30-2011, 12:46 PM

CCA4

Administrator

Join Date: Jun 2008

Location: NW PA

Posts: 7,588

My guess is primary O2 sensor(s). I don't think the ECU adjusts fueling based on MAF readings at idle.

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