Question about 1996 Ford Taurus

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P0401. P0133, P1131- emmision test

At begining I checked service Codes (engine service soon light )at Autozine, and I had codes P0401. P0133, P1131, WHEN i REPLACED oxygen sensor(closest to the engine) code P1131 went off,than I did clean up EGR valve and tube, after 30 miles checked again , it show P0401 and P1131 . How I can rid of these 2 codes.

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  • msdreamer44 Apr 13, 2009

    I have a 2000 Ford Taurus SE. I had a tune up and brakes done and smogged it and right after i got the transaxle light flashing and check engine , I took it to be checked and they gave me a transmission service and told me it would be like 1500 to replace all four sensors and I kinda balked! One week later out of the blue it begins leaking water from the under carriage somewhere. The diagnistic codes were like 7 of them and yet the car after service still won't go into passing or cruising gear and the rpms are very high just to go 40. Can anyone tell me what may have happened between tune up smog and taking a turn for the worse?

  • Anonymous Mar 16, 2014

    Engine runs ruff code p1131

  • Anonymous Mar 22, 2014

    Why my (Service Engine Soon) lamp is on, and I checked the engine and everything

  • Anonymous Mar 27, 2014

    engine light on. had car checked. the codes p1401 and p0401 came up. what could be the problem?

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Based on what the tech manuals say I would change the DPFE sensor for the EGR Valve, careful not to tear the special silicone rubber hoses that go to it from the exhaust, as a Ford dealer tech I saw these codes allot, and the DPFE sensor was almost always the issue or the hoses going to it.

Posted on Oct 16, 2008

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2 Answers

What does code p1131 mean on a 2001 ford taurus


P1131 Ford
P1131 Ford - Lack of Upstream Heated Oxygen Sensor Switch Sensor Indicates Lean Bank 1

Repair Importance Level: 3/3

Repair Difficulty Level: 2/3

http://engine-codes.com/p1131_ford.html

Forum Code

Possible causes

- Faulty Oxygen Sensor

- Vacuum leak affecting bank 1 only

- Fuel injector problem bank 1

- Check for cylinder misfire on bank 1

- Engine mechanical condition

Tech notes

Though the Oxygen (O2) sensor, the Engine Control Module (ECM) has detected a lean system, which means that there is either not enough fuel or and excessive amount of air in the system. Start by checking for vacuum leaks.

When is the code detected?

The Engine Control Module (ECM) detected bank 1 oxygen (O2) at its lean limit

Possible symptoms

- Engine Light ON (or Service Engine Soon Warning Light)

P1131 Ford Description

A Heated Exhaust Oxygen (HO2S) sensor indicating rich at the end of a test is trying to correct for an over-lean condition. The test fails when the fuel control system no longer detects switching for a calibrated amount of time.

Read more: http://engine-codes.com/p1131_ford.html#ixzz3izk89wMu

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Service engine light


Need a different mechanic

They never tested anything,
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Sep 16, 2013 | Saturn Cars & Trucks

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Code p1131 please help


P1131 - Lack Of HO2S Switch - Sensor Indicates Leanxicon.jpghttp://engine-codes.com/p1131.htmlForum CodePossible causes- Vacuum leak affecting bank 1 only
- Fuel injector problem bank 1
- Check for cylinder misfire on bank 1
- Engine mechanical condition
- Faulty O2 sensor. Symptoms- Engine Light ON (or Service Engine Soon Warning Light)P1131 Description A Heated Exhaust Oxygen (HO2S) sensor indicating lean at the end of a test is trying to correct for an over-rich condition. The test fails when the fuel control system no longer detects switching for a calibrated amount of time.

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How to reset computer on Saturn 2001 LS - did not pass air pollution test. Three codes came up P0133, P0341, P0442. The car runs fine. Check engine light is on.


Resetting the computer isnt going to fix anything. Get it repaired. If you reset it, it still will not pass if the monitors have not run and passed.

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My engine light is on so i took an OBD reading and it showed the error codes P0401, P0420 and P0133. What do I need to fix?


P0401 is EGR valve, low circulation detected.
P0420 Catalyst system.
P0133 is O2 sensor bank 1 sensor 1.
All these codes are emissions related, so i would start with the EGR valve, it's probably clogged with carbon. The catalytic converter could be also, check that for excessive backpressure. The oxygen sensor can be tested, replace if needed. Good luck, i hope this helps.

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97 Buick Lesabre, had emmisions test done (which it passed) as soon as leaving emmisions test check engine light came on. Any ideas what may have caused this?


Stop by any good parts store (Autozone, Advance, etc) and have them do a FREE OBII scan. It will read all your fault codes and more than likely light came on because of emission test. But have them read the faults and reset your light.

Feb 23, 2011 | 1997 Buick LeSabre

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The service engine soon light just came on not running hot or sounding funny


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Mar 13, 2010 | 2001 Mitsubishi Eclipse Spyder

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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

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1 Answer

1997 Toyota Celica - Codes P0133 & P0401


well if its poping an o2 code try a couple things before you start spending money. when it starts up listen for a rattle from the cattilitic convertor. if you have a bad rattle replace the cat that might solve both codes if no rattle replace the o2 sensor, it might just be that. hope this helps

Apr 09, 2009 | 1999 Saturn SL

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