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Thread: More EGR problems

  1. #1
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    Default More EGR problems

    Hi all Can anyone give me any advice my 53 reg Vectra 2L Dti keeps on getting the service light flick on and sometimes goes into limp mode, I've had it on a diagnostic and came up with po400 EGR and po638 accelerator sensor so I changed the EGR valve for a new one and checked all the thin black pipes and connectors for splits and also swapped the two white pipes over that go on the two solenoids at the front right hand side of rad, I,ve also cleaned out the metal throttle body on top of the EGR valve and made sure the flap is working OK, I'm now baffled. Anyone got any pointers would appreciate it.

    Thanks John.

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    Hi, did you get to the bottom of this. I have both these codes on my Signum 2.0 diesel and mechanics are scratching their heads as to what the problem is. Any help would be appreciated.

    Thanks in advance

    R.

  3. #3
    Regular Member eaglepva's Avatar
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    was their any other symptoms with the EGR valve?

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