Can any body give me the specifics on this code. I am trying to determine if the dealer is jacking me arround.

Thanks.

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99' F-150 XLT SC 4X4 ORP LS 4.6L K&N Air Filter Air Box Mod (3" intake from fender & silencer removed), Superchip, A.R.E. Cover, Duraliner bed liner, Rapidflow 3" single CatBack exhaust.

 

I should have said code P0131.

sorry

 

From the Hayne's Manual PO131 probable cause is an upstream heated O2 sensor circuit low voltage (bank 1 ).

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98 4x4 Lariat SC 5.4L ORP, Tow Package, 3.55 LS in oxford white two tone. Only modifications, K&N Filtercharger and Stepshield door still protectors. Many more to come.

 

JMtruck is correct....The 1997-2000 Chilton's manual lists code P0131:

P0131 - O2 Sensor Circuit Low Voltage (Bank no. 1 Sensor no. 1)

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2000 F-150 XLT, 4x2, 5.4L Supercab, Styleside, Black with silver two-tone, 3.55, class III towing package with heavy duty cooling package, overhead console, sliding rear window, keyless entry, dark graphite interior, in dash CD, Pendaliner bedliner, K&N air filter, rubberized undercoating, cabin filtration system, Bugflector II, 5W-30 Mobil 1, engine build 10/4/99

 

I think this is the lean code. Codes are not stored unless there is a continuous problem. Problems: Faulty injector, faulty O2 sensor,(seen lots of these), MAF elements are dirty and causing a borderline lean, fuel pressure low.
Stay with it until it is resolved, you don't want to burn a piston up.

Birdman