Question about 2002 Mercury Sable

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EGR Sensor/valve replacement

My check engine light is on and when I got the codes it said that it could be the EGR sensor and/or valve. I'm pretty clueless, where are these parts located? Are the fairly easily replaced?

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  • Anonymous Apr 28, 2009

    2000 SEL Ford tarus

    Check engine light on.

    Code says Egr sensor/valve problem

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The EGR is a three part series; the valve, soleniod, and sensor. They are fairly easy to change, a few hours with a buddy. They are located on the top back, center of the engine. Take a look you will see something that is small and cylinder like with a wire connected to the top, that is the vavle. I would replace all three at once as they are all together and you have to take of one to take of the others. The total price will cost you about $250 in parts. However, you must know your engine type on the Sable/Tarus as the parts are different per engine.

Posted on May 02, 2009

  • zink0326 May 02, 2009

    Sorry you will have to take off one to take off the other.

  • zink0326 Jan 16, 2010

    Found a problem with Ford/Mercurys "new" EGR sensor for the Sable. The original EGR sensor is no longer made by Ford so they have what they call an "adequate" alternative replacement. However the new sensor does not give enough voltage out to the computer so it does not work...big problem. So you replace a bad part with a part that does not work on a 2002 Sable. When you buy the EGR sensor make sure that it is the exact same part number. If not you may want to look at used parts.

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Hi, you may have 2 separate problems here. 107 indicates the MAP sensor, and that may be also causing the 172 code. The other codes indicate the EGR valve position sensor, which is integral to the valve itself. I would test both of these before replacing (the EGR valve is about $150 and the MAP sensor about $60-70). First check the connectors on them for any corrosion or poor connection. The MAP sensor is mounted to the top of the intake manifold. The EGR valve is at the back of the engine near the brake booster. Please let me know if you have any questions, and thanks for using FixYa.


MAP Sensor TESTING
See Figures 1, 2 and 3 jturcotte_1442.gif

Fig. Fig. 1: Typical Manifold Absolute Pressure (MAP) sensor wiring diagram (wire color, terminal identification/location may vary on certain models)

  1. Backprobe with a high impedance voltmeter at MAP sensor terminals A and C .
  2. With the key ON and engine off, the voltmeter reading should be approximately 5.0 volts.
  3. If the voltage is not as specified, either the wiring to the MAP sensor or the VCM may be faulty. Correct any wiring or VCM faults before continuing test.
  4. Backprobe with the high impedance voltmeter at MAP sensor terminals B and A .
  5. Verify that the sensor voltage is approximately 0.5 volts with the engine not running (at sea level).
  6. Record MAP sensor voltage with the key ON and engine off.
  7. Start the vehicle.
  8. Verify that the sensor voltage is greater than 1.5 volts (above the recorded reading) at idle.
  9. Verify that the sensor voltage increases to approximately 4.5. volts (above the recorded reading) at Wide Open Throttle (WOT).
  10. If the sensor voltage is as specified, the sensor is functioning properly.
  11. If the sensor voltage is not as specified, check the sensor and the sensor vacuum source for a leak or a restriction. If no leaks or restrictions are found, the sensor may be defective and should be replaced.

jturcotte_397.jpg

Fig. Fig. 2: Using jumper wires and a high impedance voltmeter test between MAP sensor terminals A and C with the key ON and engine off. The voltage should be approximately 5 volts

jturcotte_398.jpg

Fig. Fig. 3: Next test between MAP sensor terminals A and B with the key ON and engine off. The voltage should be approximately 0.5 volts



EGR test: requires a GM scan tool:


jturcotte_1443.gif



EGR replacement:

Linear EGR Valve

  1. Disconnect the negative battery cable.

Note the position of the EGR valve prior to removal. Do not rotate the valve 180?.
  1. Unplug the valve electrical connection..
  2. Unfasten the valve retainers, then remove the valve and the gasket.

To install:

  1. Clean all gasket residue from the gasket mating surfaces.
  2. Install a new gasket and the valve.
  3. Install the valve retainers.
  4. On 1998-99 2.2L models, tighten the retainers to 19 ft. lbs. (26 Nm).
  5. Attach the valve electrical connections and connect the negative battery cable.

Component locations:

jturcotte_1444.gif

EGR valve wiring:


jturcotte_1445.gif
EGR valve pic;

jturcotte_401.jpg

MAP sensor pic:

jturcotte_400.jpg

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