How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site. Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask Greg Your Own Question
Greg, All import japan models
Category: Mitsubishi
Satisfied Customers: 7279
Experience:  All Japan made models
Type Your Mitsubishi Question Here...
Greg is online now

I've got fault code ( p0403 ) come upon 2006 plate

This answer was rated:

I've got fault code ( p0403 ) come upon 2006 plate Mitsubishi l200 diesel. I've cleaned out egr valve and turn off fault via computer. When turning ignishion back on fault reappears . Also noticed a little bit of soot in water ?


If this fault comes back on just with switching on the ignition then you have a problem with the EGR being stuck open/closed .try another EGR valve , but first check the wiring harness for any shorts to ground a short will also give you this code .

Wiring harness good replace the EGR valve .

Still need additional information then please get back to me with the reply button, and not the poor or bad service, this way i can get back to you or suggest another expert if needed.
Your deposit does not pay me until the answer is rated in a positive way,
A bad rating does not constitute a refund.
If you are not happy or you have sorted out your problem before the answer then please let me know with the reply button .
Kind regards Greg.

Greg and other Mitsubishi Specialists are ready to help you
Customer: replied 1 year ago.
Ok I agree with your comment but what about soot in the water system is this caused through egr valve not working and can it do major damage to engine ?

Soot in the coolant water .is a sign of a headgasket issue .

Do a Co2 test to confirm a bad head gasket .

Then please get back to me .