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Trouble codes p0171, p1131, and p0136 - 2001 Ford Econoline

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P0171 = system too lean bank one. p0136 is a bad Ox sensor bank 1 sensor 2. You have at least one bad Ox sensor. trouble codes p0171, p1131, and - 4df0849.jpeg

Posted on Oct 09, 2010

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Chevy Silverado error p1151


P1151 Lack of Upstream Heated Oxygen Sensor Switch - Sensor Indicates Lean - Bank No. 2


p1131 p1151 p0171 p0174 p1131 p1151 p0171 p0174
All of these p1131 p1151 p0171 p0174 codes indicate a problem with a lean condition. This engine is known for vacuum leaks, so before you start throwing oxygen sensors at the problem, it pays to perform some diagnostics.
Start by cleaning the MAF sensor. Spray the sensor with CRC MAF sensor cleaner. Next, check the plastic vacuum lines, especially where they meet with rubber boots. If they are cracked or the rubber is swollen, replace the line. Then check the rubber elbow that holds the PCV valve. That elbow is a know failure point. In fact, the entire PCV tubing is a trouble spot on these engines. (thanks Ford).
After you've checked for vacuum leaks, check the operation of the oxygen sensors. The easiest way to do that is to disconnect the sensor from the harness. Connect one lead of your digital voltmeter to the black wire on the sensor and the other lead to battery negative. Then start the engine and add fuel (either propane, starting fluid, or carb cleaner) into the throttle body to force the mixture to rich. You should see a corresponding increase in voltage as you add fuel (from 0 volts to slightly less than 1 volt). Start and stop the fuel enrichment and watch the meter to see if the volts drop as you stop adding fuel. If you see no change, the sensor is dead. Replace it.
You can also use the fuel enrichment procedure to locate intake gasket leaks.
P1131 Lack of Upstream Heated Oxygen Sensor Switch - Sensor Indicates Lean - Bank No. 1
P1151P1151 Lack of Upstream Heated Oxygen Sensor Switch - Sensor Indicates Lean - Bank No. 2
P0174 system lean bank 2
P0171 system lean bank 1


This is the only info that didn't come back directly to FORD (yet still mentions it) instead of GM. Not to sure you got the correct code.

Jul 08, 2014 | 1999 Chevrolet Silverado 1500

1 Answer

2002 Lincoln LS, Enigine has bad miss. Trouble codes are po171b, po174b, po300b, po305b, po306, po420, p1131


Fix the misfire concern on cylinders 5 and 6. That will probably take care of the lean codes p0171 and p0174. The catalytic converter is probably damaged from the misfire concern....that's what is setting the p0420 code. Take care of these concerns first before fixing p1131 code

Jan 15, 2013 | Ford F-450 Cars & Trucks

1 Answer

GOT POCKET SCAN, RESULTS CODES ARE P1131,P1151,P0171,P0174,P1174


Put OBD2 Codes followed by the number into google

You can read all day long

Then study obd2 systems

Codes do not tell you what is wrong
& never to replace anything

Codes are used with diagnostic factory
manuals & trouble charts to COMPONENT
TEST never replace a thing until they fail a test
& you find a system fault

Nov 15, 2012 | Cars & Trucks

1 Answer

Ford windstar trouble codes p0171-p0174- p1131-p1151-p0305


All these are fuel trim codes and fuel control O2 sensor related codes, you have something that is causing this as all the sensors seldom fail. My advice here is to see a Ford dealer for the diagnostics before any parts are replaced.

Jun 27, 2012 | 2001 Ford Windstar

3 Answers

Have a van w/ code P0171 and pending P1131. Idea is MAf


Hi

P0171 suggests th van is running to lean on bank 1 is the cylinder bank on the RIGHT (passenger side) the plug may be defective or coil damage, no spark.

Is this a gas version or Derv / diesel ? I am assuming it's gas.

DTC P1131 indicates the system is correcting RICH for an overly LEAN condition. In english this means the car's computer is telling the fuel pump to use more fuel (running RICH) because the engine has a low air-fuel mixture (LEAN). The car is out of tune or the airflow sensor, (O2) Heated Oxygen Sensor are worn or are getting an incorrect reading.

So quite rightly it could well be the MAF sensor, and I would look there first. also, try cleaning it with carb cleaner before replacing it, and also look for any air leaks in pipes as again this could cause this.

Regards

Dan

Dec 29, 2010 | 2001 Ford Econoline

4 Answers

I have four codes. P0136, P0141, P0171, P0401.


p0136 and p0141 are o2 sensors and p0401 is a egr flow and the p0171 means its running lean on low bank 1

Jun 30, 2010 | 1996 Ford Econoline

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

1999 LEXUS RX300 41000 MILES CEL ON


what are the new codes clearing / resetting doesnt fix the problem the p0171 code has about ten different causes just changing or cleaning the sensor may not have been your problem
P0171 System Too Lean Bank 1 rescan and get all codes then look up each one most sites have causes and solutions for obd ll trouble codes

Jul 23, 2017 | 1999 Lexus RX 300

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