Question about 2003 Ford F150 Regular Cab

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My 2003 f150 4.2L misses occasionally, mostly between 50 and 60 mph until yesterday I had no code, I checked and I got the p1131 and p1151, could this be causing the truck to miss?

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Yes they both can do this. there is a coil pack for each cylinder, and at high speeds this should seem to go ayay and at low speeds and/or acceleration it will appear to get worse. think about a full tune up IE...plugs,wires,all coils, and if they all mount to a plate, then the control module as well, but I believe this truck has individual ones above each cyl.

Posted on Dec 31, 2010

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2000 Lincoln Navigator - few days ago started idling very rough when truck is at a stop or in park. Service Engine Light came right around time I noticed that it was idling rough when stopped. Following...


P1131 Lack of HO2S-11 Switch ,Sensor Lean
P1151-Lack of HO2S-21 Switch ,Sensor Lean
PO171- System to Lean (Bank 1)
PO174-Systen to Lean (Bank 2)

Fuel Filter -Plugged
Low Fuel Pressure
Evap System -Leaks
Leaks - in ducting,air filter to throttle
PCV -Leaks
Exhaust System -Leaks
O2 Sensors-worn out

Apr 06, 2011 | 2003 Lincoln Navigator

1 Answer

What are engine codes p1131 and p1151 mean?


P1131-- Lack of HO2S-11 Switch (lean)
P1151--Lack of HO2S-12 Switch (lean)

There are at least 26 possible causes in the
Diagnostic Trouble Code Chart

That isn't going to be a driveway job,
your going to resolve

Mar 12, 2011 | Ford F-150 Cars & Trucks

2 Answers

I have a 2002 f150 4.6 codes p1131-p1151-po316-po306 runs bad under 1000 rpms wont idle going down road stumbles at steady 45 mph not sure what to do next what do u think


p0306 is a cyl #6 misfire
p0316 is unknown to me. sry.
p1131 and p1151 deal with the O2 sensors 1151 says Bank 2 Sensor #1 Heater Circuit intermittent. 1131 says that HO2S 11 indicates lean.

p0306. Check the plugs wires and coil at Cyl #6 (second one back from front on drivers side, if it's the same as my Stang)

Sep 12, 2010 | Ford F-150 Cars & Trucks

1 Answer

Idling rough in cold weather codes that come up are p1131 and p1151 need to know what these codes are and what parts they are


DTC P1131 DTC P1151 indicates the system is correcting RICH for an overly LEAN condition. The Heated Oxygen Sensor (HO2S) voltage is less than 0.45 volts. This is usually due to a vacuum leak after the MAF. It can also be caused by a bad PCV valve or PCV system hose. It can also be caused by low fuel pressure or a plugged injector.

Start with the simple and clean the MAF and the IAT sensor. In simple terms, the engine is running lean and is being compensated by the ECM. P1131 is bank 1 and P1151 is bank2

Good luck and keep me posted.




Feb 17, 2010 | 2001 Ford F150 Styleside SuperCrew

2 Answers

2002 Ford Windstar Error Code P1131 And P1151


those two codes are for the o2 sensors. both are the upstream sensors on the front and rear banks. so they are desinagted bank 1 sensor 1 and bank 2 sensor 1. them most common cause for this is faulty o2sensors , bad gas and of a poor running engine. so if your car runs good (no misfire) and gas is ok then replace the o2sensor witch is the very most common cause.

Jan 28, 2010 | 2000 Ford Windstar

2 Answers

How do i fix emission codes p1131 p1151 p0171


TSB
05-22-6
ISSUE:
Some 2001-2003 F-150, 2004 F-150 Heritage and 2001-2003 E-150/250 vehicles equipped with a 4.2L engine may exhibit the malfunction indicator lamp (MIL) on with diagnostic trouble codes (DTCs) P1131 and/or P1151 (system too lean bank 1 or 2). This condition may be due to leaking isolator bolts/port gaskets in the upper-to-lower intake manifold mounting area. This condition is sometimes intermittent and may not be apparent on a warmed-up engine.


SERVICE PROCEDURE

Perform a self test. If DTC P1131 and/or P1151 are the only codes stored in the powertrain control module (PCM) proceed to Step 2. If any additional DTCs are present, follow normal diagnostic procedures found in the PC/ED Manual.

Remove the upper intake and replace only the port gaskets (9H486) and isolator bolt assemblies (9S479). The new isolator bolt assemblies use a rubber material that is green in color, do not install the old isolator bolt assemblies with the black rubber material. Do not replace any other intake parts or gaskets.
While the upper intake manifold is removed, check the exhaust gas recirculation (EGR) orifices that are pressed into each primary port of the lower intake manifold. If any of the orifices are plugged with soot, clean and unplug them with a pick and solvent.

PART NUMBER PART NAME
1L3Z-9H486-AA Port Gasket
3F2Z-9S479-AA Isolator Bolt

Jan 13, 2010 | 2003 Ford F150 Regular Cab

1 Answer

Poor idle dtc P1151, P1131,P0174, P0171. runs ok


Change plugs, and Mass Air Flow sensor. This should do the trick

Nov 29, 2009 | 2003 Ford Taurus

1 Answer

Have engine trouble codes P1151 and P1131


If both, P1131 and P1151 trouble codes are set at the same time, the problem will most likely be attributed to a vacuum leak past the MAF (Mass Air Flow) sensor or something else that would likely affect BOTH banks. If the problem is only causing one code or the other, but NOT both, the problem will most likely be something that would affect one bank, like a bad O-2 sensor or a fuel injector; the most common cause of a single code either the P1131 or P1151 in my experience has been a bad Oxygen sensor.

Nov 07, 2009 | 2001 Mazda Tribute

1 Answer

I got the codes from auto zone 4 codes came up p1151,p0171,p0174,p1131 all of the codes listed several possibilties and the MAF was listed on them all does the mass air flow censor cause this


it could but most likely not check for a vacuum leak check the hoses to the throttlebody the rubber fittings have a tendancy to get soft and collapse

May 17, 2009 | 2003 Lincoln Navigator

2 Answers

98 E-250 Rough Idle; codes p0156,p1131,p1151,p0301,p0171,p0174+


po301 thru po306 all misfire codes cylinder 1-6 remove plugs and replace them..... set the plug gap first
i suggest u replace the wires also if they never been replaced all these misfire codes can set the others and one is for the oxygen sensor ( 02s or HO2S) CIRCUT MALFUNCTION do u know how to check wireing systems
do the tune up plugs (set gap) .052-.056 change the fuel filter also. clear the codes hows it run
this info is for 98 E-250 4.2Litre
what engine do u have 4.2L or 4.6L i know it is a v-6 by the codes

Dec 15, 2008 | 2003 Ford E250

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