MDP Sensor Code Won't Go Away

So you've tested the manifold differential pressure (MDP) sensor and according to the test results, it's good but the check engine light keeps coming back on even after you erased the diagnostic trouble code (DTC). Well, here in this section are a couple of suggestions that might inspire your next diagnostic move.

Probably the most helpful thing to keep in mind is that the manifold differential pressure sensor (MDP) on your 2.4L Mitsubishi is just used as a feedback sensor. The feedback it sends the PCM is on the EGR system. Specifically, it helps confirm EGR flow into the intake manifold when the PCM commands the EGR valve to open.

So if the MDP sensor tested good (or you've replaced it) and you're still getting a trouble code for it, then:

  1. There's a good chance that an EGR passage/tube is plugged up and not letting the exhaust gas recirculate.
  2. The EGR valve itself is bad (internal diaphragm is ruptured and not opening the pintle to let exhaust gas recirculate).
  3. The EGR Vacuum Solenoid is bad.

Where To Buy The MDP Sensor And Save

You can find the MDP sensor just about in anywhere. The best place to buy it and save a few bucks is is online.

The following links will help you comparison shop for the MDP sensor:

Not sure if the MDP sensor fits your particular vehicle? Don't worry, once you get to the site they'll make sure it fits by asking you the specifics of your particular Mitsubishi vehicle. If it doesn't fit then they'll find you the right MDP sensor.

More 2.4L Mitsubishi Tutorials

You can find a complete list of 2.4L Mitsubishi tutorials here: Mitsubishi 2.4L Index Of Articles.

Here's a small sample of the tutorials you'll find in the index:

  1. How To Test The Fuel Injectors (2.4L Mitsubishi).
  2. How To Test The Throttle Position Sensor (2.4L Mitsubishi).
  3. How To Test The Engine Compression (Mitsubishi 1.8L, 2.4L).
  4. Testing A Bad Alternator: Symptoms And Diagnosis.
  5. How To Bench Test The Starter Motor.
  6. Blown Head Gasket Test (Mitsubishi 1.8L, 2.4L).
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Mitsubishi Vehicles:

  • Eclipse 2.4L
    • 1997, 1998, 1999, 2000, 2001, 2003
  • Expo 2.4L
    • 1992, 1993, 1994, 1995
  • Galant 2.4L
    • 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2003