Question about 1992 Ford Taurus

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How do i know if egr valve is defective - 1992 Ford Taurus

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Unplug the vacuum lines,plug them,and test drive ,to see if problem went away

Posted on May 12, 2010

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Posted on Jan 02, 2017

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What are codes p1401 p0302 p0305 p1409 p0301


P1401 Differential Press Feedback EGR Circuit High Input
Your EGR port is plugged. Replace your EGR valve, and clean the ports
A code P0302 may mean that one or more of the following has happened:
  • Faulty spark plug or wire
  • Faulty coil (pack)
  • Faulty oxygen sensor(s)
  • Faulty fuel injector
  • Burned exhaust valve
  • Faulty catalytic converter(s)
  • Running out of fuel
  • Poor compression
  • Defective computer
  • A code P0305 may mean that one or more of the following has happened:
    • Faulty spark plug or wire
    • Faulty coil (pack)
    • Faulty oxygen sensor(s)
    • Faulty fuel injector
    • Burned exhaust valve
    • Faulty catalytic converter(s)
    • Running out of fuel
    • Poor compression
    • Defective computer
    • A code P0301 may mean that one or more of the following has happened:
      • Faulty spark plug or wire
      • Faulty coil (pack)
      • Faulty oxygen sensor(s)
      • Faulty fuel injector
      • Burned exhaust valve
      • Faulty catalytic converter(s)
      • Running out of fuel
      • Poor compression
      • Defective computer
      • A code P0302 may mean that one or more of the following has happened:
        • Faulty spark plug or wire
        • Faulty coil (pack)
        • Faulty oxygen sensor(s)
        • Faulty fuel injector
        • Burned exhaust valve
        • Faulty catalytic converter(s)
        • Running out of fuel
        • Poor compression
        • Defective computer
        • p1409
        • EGR Vacuum System Leak - Read Our Article on EGR Valve Codes For Help With This Oldsmobile Check Engine Light Code

Sep 25, 2014 | Cars & Trucks

1 Answer

P0406 engine codes


form the fsm
i paste
Possible causes
- EGR Valve clogged, dirty or leaky
- EGR valve damaged/defective
- EGR volume control solenoid valve
- EGR temperature sensor and circuit
- EGR volume control solenoid valve harness is open or shorted
- EGR volume control solenoid valve circuit poor electrical connection

the tests are in the FSM. or here
http://www.scantool.net/software/alldata-diy-1-month-subscription.html

Jan 14, 2014 | 2000 Toyota Camry Solara

1 Answer

What does obd2 code p0406


The code P0406 is for Exhaust Gas Recirculation Sensor 'A' Circuit High. The possible causes are EGR Valve clogged, dirty or leaky, EGR valve damaged/defective, EGR sensor ground circuit open, EGR sensor signal circuit open, EGR volume control solenoid valve harness is open or shorted, EGR volume control solenoid valve circuit poor electrical connection. An improper voltage signal is sent to ECM through the valve. You will have the symptoms of engine light on and engine hesitation.

Jul 02, 2013 | Cars & Trucks

1 Answer

A P0401 code sets. I have done the egr valve three times on this car. I have cleaned the intake and the exhaust tube five times. The last time was only 1000 miles ago. The egr valves are new from the...



  • Restriction in the EGR passages, usually caused by carbon buildup
  • The EGR Valve is defective
  • Lack of proper vacuum or electrical signal to the EGR valve
  • Malfunctioning EGR Vacuum supply solenoid
  • Lack of proper EGR system feedback to the computer from the:
    • Manifold Absolute Pressure Sensor (MAP)
    • Differential EGR Pressure Feedback Sensor (DPFE)
    • EGR Valve Position Sensor (EVP)
    • EGR Temperature Sensor


    Feb 28, 2011 | 2006 Suzuki Grand Vitara

    1 Answer

    2006 Honda Pilot. JUST started hesitating when push gas, Lunges one second later. Takes longer cranking. Both only in last 2 days. Engine light too. Codes are P0301, P0302, P0303...P0306, (each...


    SOUND LIKE PROBLEM IS EGR VALVE FAILURE.CHECK TO SEE IF EGR VALVE IS GETTING VACUUM. IF ALL IS GOOD EGR VALVE INTAKE OR EXHAUST MANIFOLD PASSAGES ARE RESTRICTED OR THE EGR VALVE IS DEFECTIVE.

    Jul 05, 2010 | 2006 Honda Pilot

    1 Answer

    I have a mis with my 1995 cadillac eldrado


    Pull off the EGR valve and cea the carbon off of it next put a hose on the vac port on the egr and **** on the tube does the egr pintal valve open up? if yes then te egr valve is working, once the egr valve is open put the tip of your toung on the hose and see if it stays open if it does not then the EGR valve is defective. Aslo the fuel trim is affected by EGR vavle hope this helps and thanks for using fixya

    Jul 03, 2010 | 1995 Cadillac Eldorado

    2 Answers

    1999 toyota RV4 code P0401 EGR is good ,   vacuum line is good , what parts could be check.


    It means that the egr valve is working, the problem is a very common one, it's the egr modulator valve and to some extent the vacuum switching valve(VSV) for the egr valve, the modulator is attached to the egr valve, remove it and if air can pass from the bottom port through it is defective, in that case replace it and see if it takes care of the problem, if the valve is ok the egr
    vsv should be replaced.

    Feb 13, 2010 | 1999 Toyota RAV4

    1 Answer

    Egr valve insufficient flow detected


    clean the exhaust ports where the egr valve fastens to the tube and check the EGR valve for being out of range sounds like is it defective

    Jan 14, 2010 | 2000 Honda Odyssey

    2 Answers

    Engine sputters under load. engine surges then drags---sometimes it runs normally then for no reason problems arises again.


    Have your EGR valve checked. Defective EGR valve will cause all the symptoms youare experiencing

    Oct 08, 2009 | 1994 Suzuki Sidekick

    1 Answer

    Revs rise and fall when meant to be idleling


    Check your EGR valve. EGR valve should be close when idling, if it opens, idling speed will drop. A defective EGR valve or the computer that controls the emmision may be the cause of your problem.

    Mar 07, 2009 | 1995 Suzuki Sidekick

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