Computer Engine Management Light on with P0401 code after Kwik Fit service!! - Civinfo
 
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post #1 of 7 (permalink) Old 5th January 2011, 19:44 Thread Starter
 
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Engine Management Light on with P0401 code after Kwik Fit service!!

Hi all

I stupidly decided on a Kwik Fit full service today. Now the engine management warning light (orange) is on, with a P401 (or is it P0401) code which I think is the EGR. The car is now in limp mode, and they asked me to bring the car back tomorrow.

They disconnected the battery apparently, after replacing a filter. I know my EGR is not bust, there was no problem with the car before I took it to Kwik Fit.

Has anyone experienced this before? I dont think the EGR or exhaust is tinkered with during a full service? I think perhaps it was the battery being disconnected that has caused this perhaps?

Any advice greatly appreciated as always.

cheers
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post #2 of 7 (permalink) Old 5th January 2011, 19:49
 
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What model of Civic have you got - could be the ECU playing up or the oil used.
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post #3 of 7 (permalink) Old 5th January 2011, 20:01
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If DTC P0401 is indicated, check for poor connections or loose terminals at the EGR valve and the ECM
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post #4 of 7 (permalink) Old 5th January 2011, 20:38 Thread Starter
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thanks for your replies

its a 2007 type s GT (2.2 diesel).

i noticed a grey small vacuum pipe was disconnected on the right side of the engine. I plugged it back on and the engine sounds better, but the engine management light is still on.

Where is the EGR valve? would the pipe disconnected cause the limp mode? I can rev above 2k now with the car in neutral, not tried driving it yet
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post #5 of 7 (permalink) Old 6th January 2011, 04:59 Thread Starter
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warning light is now out. since i plugged the vaccuum pipe back on, after 20 minutes it has now gone. phew, was bracing myself for a moment back there!
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post #6 of 7 (permalink) Old 6th January 2011, 22:07
 
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From my understanding, the engine management light will stay illuminated until any errors have been cleared - pulling the negative battery terminal for a couple of minutes usually seems to do the trick, provided you have actually fixed the cause of the error.
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post #7 of 7 (permalink) Old 6th January 2011, 22:30
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They let those chimps in kwik fit do services?? Whatever next? lol
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