Question about 1997 Ford Escort

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Ford Escort 1997 Sta. Wagon appears to have DTC Code p1131

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  • Richard Flores May 14, 2010

    I have a 1997 Ford Escort Sta. Wagon 2.00Engine
    And I have a DTC Code p1131, I want to know what it is this Code about, can anyone help me?

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DTC P1131 indicates the FUEL INJECTION system is correcting RICH for an overly LEAN fuel condition. The Heated Oxygen Sensor (HO2S) voltage is less than 0.45 volts. This is usually due to a vacuum leak after the MAF (mass airflow sensor). It can also be caused by a bad PCV valve or PCV (positive crankcase ventalation) system hose that leaks, also get a can of spray carburetor cleaner and spray the intake manifold for leaks at the gasket, this will cause the engine to run lean, as u can see there is no clear cut reason for this lean fuel condition. the code can also be caused by low fuel pressure or a plugged fuel injector injector or low flowing fuel injectors, the dealer would need to do these tests as it requires special equipment. MY experience? 35 years as a Ford trained electronic engine control specialist.

Posted on May 14, 2010

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  • Master
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P1131 is O2 sensor bank one slow to respond (paraphrased). It means that something is making the O2 sensor on that bank switch at a slow rate. Possibilties could be that the sensor is bad, you have a vacuum leak, or that there is a misfire on that bank.

Posted on May 14, 2010

  • Richard Flores May 14, 2010

    Where is this Sensor located at , how will I recognized ?

  • INDIRA KUMAR
    INDIRA KUMAR May 14, 2010

    In the exaust manifold. If you raise the hood and look down on the front
    of the engine, you will see the exaust manifold, and there will be a sensor
    screwed into the middle of that manifold. That is the O2 sensor.
    There is another sensor further down the exaust system that looks just like
    it that some people mistake for an O2 sensor, but that sensor
    is called a catalyst moniter. But the one you can see while standing in
    front of the car with the hood up is the O2 sensor.

    Please do reconsider the rating you have given.


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1 Answer

Code p11311


see this causes and fix it. God bless you
P1131 Code Causes
  • The P1131 code can be initiated due to a bad fuel injector, a slow sensor or a vacuum leak. Generally, the P1131 code is triggered by a faulty or failing sensor.

Oct 04, 2012 | 1997 Ford Escort

1 Answer

Mazda626code p1131


Hi there:
DTC P1131 - HO2S Bank 1 Sensor 1 Signal Below 0.45v (A/F Ratio Too Lean)
Just check and clean harneses connections if not solve itr, replace O2 sensor.


Hope this helps; also keep in mind that your feedback is important and I`ll appreciate your time and consideration if you leave some testimonial comment about this answer.

Thank you for using FixYa, have a nice day.

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The information you are asking for varies depending on how the vehicle is equipped ie. ENGINE SIZE, AUTOMATIC or MANUAL TRANSMISSION, 2-WHEEL DRIVE, 4-WHEEL DRIVE, ALL-WHEEL DRIVE, etc.
With that said, it also deserves mention that there is a Technical Service Bulletin published by Ford Motor Company that applies to the model year and model that you have listed that involves Diagnostic Test Code (DTC) P0456.

Please note that this bulletin emphasizes the requirement of special equipment to properly diagnose and repair the DTC's listed in the bulletin. Below is a brief (partial) description of the bulletin:

Article No.
03-20-3
10/13/03
DRIVEABILITY - MALFUNCTION INDICAOR LAMP
(MIL) ILLUMINATED WITH DTC'S P0442, P0455,
P0456, P0457, P1442 OR CHECK FUEL CAP LAMP
ILLUMINATED WITH DTC P0457
FORD: 1997-2000 CONTOUR 1997-2002 ESCORT 1997-2003 CROWN VICTORIA, MUSTANG, TAURUS 1998-2003 ESCORT ZX2 2000-2003 FOCUS 2002-2003 THUNDERBIRD1997 F-250 HD
1997-1999 F-250 LD
1997-2003 E SERIES, EXPEDITION, EXPLORER, F-150, RANGER, WINDSTAR
1999-2003 F SUPER DUTY
2000-2003 EXCURSION
2001-2003 ESCAPE, EXPLORER SPORT TRAC, EXPLORER SPORT
LINCOLN:
1997-1998 MARK VIII
1997-2002 CONTINENTAL
1997-2003 TOWN CAR
2000-2003 LS
1998-2003 NAVIGATOR
2002-2003 BLACKWOOD
MERCURY:
1997-1999 TRACER
1997-2000 MYSTIQUE
1997-2003 GRAND MARQUIS, SABLE
1999-2002 COUGAR
1997-2003 MOUNTAINEER
This article supersedes TSB 03-9-8 to update the vehicle lines and Service Procedures.
ISSUE
Some vehicles may exhibit a Malfunction Indicator Lamp (MIL) illuminated with Diagnostic Trouble Codes (DTCs) P0442, P0455, P0456, P0457 or P1442 or a "Check Fuel Cap" Lamp illuminated with DTC P0457 for the Evaporative Emission System. This may be caused by loose or leaking hoses, loose or broken fuel cap, a leak at the top of the fuel filler pipe neck, etc.
ACTION
Use the Rotunda Leak Detector Smoke Machine (Part 218-00001) or equivalent, to locate and repair leaks in the Evaporative Emission System.

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I am hoping the attached images may help you find what your looking for. Please let me know if you need additional information.


Thanks

rltofixya.gif

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