Question about 1999 Plymouth Grand Voyager

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Exhaust gas reciculation flow

Exhaust ga reciculation flow

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Below is a link to the EGR (exhaust gas reciculation) valve on your car.

Here are instructions on removal:

  • Disconnect the negative battery cable.
  • Unplug the electrical connector from the EET.
  • Detach the vacuum hose from the EET.
  • Remove the EGR valve mounting bolts, then remove the EGR valve and EET.
  • Remove and discard the old gaskets. Thoroughly clean the gasket mating surfaces and/or passages.
  • Check for any signs of leakage or cracked surfaces. Repair or replace as necessary

    Best of luck on your repair.
  • Posted on May 30, 2009

    • Greg Margossian
      Greg Margossian Jun 02, 2009

      Please rate the solution provided if you feel it answered your question. Thanks very much.




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    DTC P0402: Exhaust Gas Recirculation (EGR) Flow Excessive

    The engine control module (ECM) tests the exhaust gas recirculation (EGR) flow when the EGR is in operation. EGR desired flow is compared to EGR actual flow. If EGR flow is higher than expected DTC P0402 will set.

    Do you know what EGR is ?

    Nov 14, 2017 | Cars & Trucks

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    99 maxima ran till it was parked now it turns over will not start gave code p0400 any ideas

    The fault is somewhere around the EGR valve - probably the EGR valve or the throttle position sensor.

    Before replacing any sensors try removing and cleaning the EGR.

    Here's a Youtube link that may be of help to you:

    1999 maxima egr Google Search

    This link explains about the EGR:
    P0400 Exhaust Gas Recirculation Flow Malfunction

    CEL code P0400 EGR Flow Malfunction

    Mar 27, 2016 | Cars & Trucks

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    What modified exhaust system is best

    exhaust systems are more complex than just sticking on any old thing
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    Sep 08, 2015 | Cars & Trucks

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    3 most common causes for your problem are:
    1. Bad EGR (Exhaust Gas Reciculation) valve - clogged EGR will cause engine to stutter or miss
    2. Bad MAF (Mass Air Flow) sensor - will also make an engine stutter when bad
    3. Bad TPS (Throttle Postition Sensor) regulates idle speed under multiple conditions.

    Mar 22, 2011 | GMC Cars & Trucks

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    OBDII SETS CODES P0401, P0171 & P0174 . 1998 Mercury Sable

    P0401- Exhaust Gas Recirculation Flow Insufficient Dectected
    Possible causes - Harness or connectors (EGR volume control valve circuit is open or shorted.)
    - EGR volume control valve stuck closed
    - EGR volume control solenoid valve
    - Dead (Weak) battery
    - EGR passage clogged
    - Exhaust gas leaks Possible solution - Clean EGR Valve
    - Repair EGR harness or connector
    - Replaced EGR volume control solenoid valve
    - Replaced EGR volume control valve
    Code P0171- Fuel Injection System Too Lean Bank 1 Possible causes - Intake air leaks
    - Front Heated oxygen sensor may be faulty
    - Injectors may be faulty
    - Exhaust gas leaks
    - Incorrect fuel pressure
    - Lack of fuel
    - Mass air flow sensor may be faulty
    - Incorrect PCV hose connection Possible solution Dirty air filter of faulty air flow sensor are common causes of the problem P0174- Fuel Injection System Too Lean Bank 2 Possible causes - Intake air leaks
    - Front Heated oxygen sensor may be faulty
    - Injectors may be faulty
    - Exhaust gas leaks
    - Incorrect fuel pressure
    - Lack of fuel
    - Mass air flow sensor may be faulty
    - Incorrect PCV hose connection Possible solution Dirty air filter of faulty air flow sensor are common causes of the problem.

    Jun 28, 2010 | 1998 Mercury Sable

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    I have a OBD II Trouble Code PO401

    EGR Flow Insufficient Detected

    May 15, 2010 | 1999 Chevrolet Lumina

    1 Answer

    2000 chevy truck 1500. I have 3 codes the computer is telling me po404, po405, po463

    PO 404 exhaust gas reciculation circuit, range or performance problems
    PO 405 exhaust gas reciculation sensor circuit low
    PO 463 fuel level sensor circuit high input

    Dec 04, 2009 | 1999 Chevrolet Silverado 1500

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    91 honda accord

    ox is same as o2 and is an oxygen sensor which is located on the exhaust manifold lower side. These sensors tell how much gas fumes in exhaust and then tell computer how to adjust air/fuel ratio

    The Mass Air Flow sensor is located in the tube running from air filter. It is attached to the throttle plate. It tells the car computer how much air flow is coming into car.

    An average car sucks in 9000 gallons of air per every gallon of gas you burn up

    Jul 23, 2009 | 1991 Honda Accord

    1 Answer

    1995 mercury villager check engine code p1200 injector open

    P0400 = EGR Flow
    P0325 = knock sensor (Do not ever change a knock sensor, they don't affect anything and cost $600 to replace for absolutely no gain)
    P1200 = I can't find this one. I think it's injector flow
    report back on what you find.
    Egr flow may be plugged egr passages or a bad solenoid.
    1996 PCED OBDII-Villager SECTION 1B: Description and Operation
    Exhaust Gas Recirculation System
    Exhaust Gas Recirculation (EGR) System Operation The exhaust gas recirculation (EGR) system (Figure 1 below) recirculates a portion of the exhaust gases into the intake manifold under average vehicle driving conditions to reduce combustion temperatures and exhaust gas NOx content. The amount of exhaust gas recirculated varies according to operating conditions and will be cut completely under:
    • Engine starting condition
    • Low engine coolant temperature condition
    • Excessively high engine coolant temperature condition
    • Engine idling condition
    • High engine speed condition
    • Mass air flow sensor failure
    The exhaust gas recirculation (EGR) system on the Villager uses the exhaust gas recirculation/evaporative emission (EGR/EVAP) control solenoid valve to provide vacuum to both the EGR valve and the EVAP canister when commanded by the PCM. If the exhaust backpressure is sufficient to close the EGR backpressure transducer valve, vacuum is sent to the EGR valve and allows EGR gas to flow into the intake manifold. If the exhaust backpressure is not sufficient, the EGR backpressure transducer will remain open and allow vacuum from the EGR/EVAP control solenoid to vent to the atmosphere.
    The EGR system monitor, for OBD II regulations, uses an EGR temperature sensor to monitor the EGR system. The EGR temperature sensor is a thermister located in the EGR passageway. When hot exhaust gas is recirculated into the engine, the temperature at the EGR passageway increases. This increase is sensed by the EGR temperature sensor and a signal is sent to the PCM to indicate EGR flow. If the EGR temperature sensor does not detect EGR flow when commanded by the PCM after two consecutive drive cycles, the malfunction indicator lamp (MIL) will be illuminated and a diagnostic trouble code (DTC) will be stored. The MIL will be turned off after three consecutive drive cycles are completed with no malfunctions detected. The DTC will remain stored in the PCM memory until 80 drive cycles have been completed without the same malfunction detected in the system.
    Figure 1: Exhaust Gas Recirculation (EGR) System Diagram Item Number Description 1 — EGR/EVAP Control Solenoid 2 — Air Cleaner Housing 3 — Throttle Valve 4 — EGR Temperature Sensor 5 — EGR Valve 6 — EGR Backpressure Transducer 7 — EVAP Canister
    Exhaust Gas Recirculation (EGR) Backpressure Transducer Valve The exhaust gas recirculation (EGR) backpressure transducer valve is used to control EGR. The EGR valve is operated by ported vacuum, but the ported vacuum will normally be vented off at the EGR backpressure transducer valve. As rpm increases, exhaust pressure increases and pushes on the diaphragm in the EGR backpressure transducer valve and closes the vacuum vent.
    Figure 2: EGR Backpressure Transducer Value
    Item Number Description 1 — Throttle Valve 2 — Vacuum Port 3 9D475 EGR Valve 4 9F452 EGR Backpressure Transducer Valve 5 — EVAP Canister 6 — EGR/EVAP Control Solenoid 7 — Vent
    EGR/EVAP Control Solenoid The exhaust gas recirculation/evaporative emission (EGR/EVAP) control solenoid (Figure 3) is controlled by the powertrain control module (PCM). The EGR/EVAP control solenoid controls vacuum to both the exhaust gas recirculation (EGR) valve and to the evaporative (EVAP) emission canister. When the EGR/EVAP control solenoid is off (12 V signal from the PCM) vacuum is supplied to both the EGR valve and to the EVAP canister. When the EGR/EVAP control solenoid is on (ground supplied by PCM) vacuum is vented to the atmosphere keeping the EGR valve closed and no vacuum to the EVAP canister. The PCM will command the EGR/EVAP control solenoid on at:
    • Engine starting condition
    • Low engine coolant temperature condition
    • Excessively high engine coolant temperature condition
    • Engine idling condition
    • High engine speed condition
    • Mass air flow sensor failure
    Figure 3: Exhaust Gas Recirculation/Evaporative Emission (EGR/EVAP) Control Solenoid
    Exhaust Gas Recirculation (EGR) Temperature Sensor
    The exhaust gas recirculation (EGR) temperature sensor (Figure 4) is a thermister type sensor that monitors the temperature of the exhaust in the EGR passageway. As the EGR flow increases, the temperature increases. This process creates a change in the resistance of the sensor, which decreases as the temperature increases. The signal is sent to the powertrain control module (PCM) to indicate that the EGR system is working properly. If the EGR temperature sensor does not change resistance as the PCM expects on two consecutive drives, the malfunction indicator lamp (MIL) will be illuminated and a diagnostic trouble code (DTC) will be stored.
    Figure 4: EGR Temperature Sensor Exhaust Gas Recirculation (EGR) Valve
    The exhaust gas recirculation (EGR) valve (Figure 5) recirculates portions of the exhaust gas back into the intake manifold to reduce the amount of the NOx released during combustion and to reduce combustion temperature. The amount of exhaust gases that are released into the engine is proportional to the load on the engine.
    Figure 5: EGR Valve

    Mar 20, 2009 | 1995 Mercury Villager

    1 Answer

    I have a 1997 suzuki sidekick jx it did not pass smog the data trouble codes are p0300 random multiple cylinder missfire detected, p0400 exhaust gas reciculation flow. how do i fix?

    In this case you need to take a look at your EGR Valve and Solenoid. I would check with your local auto parts store to see if they check those for free (some do and others charge a small fee). Most likely you have a bad EGR Valve or EGR Solenoid. Hopefully this gives you some direction. Thanks for using FixYa!



    Dec 02, 2008 | 1997 Suzuki Sidekick

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