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Vauxhall Corsa Z14XE 2003 - Long cranking time, code P0400 EGR fault #

Posted by Simon Forsey on June 5, 2014, 10:11 am

Year of Manufacture *: 2003
Engine Size and Code *: Z14XE
( Optional ) ECU Type: Multec
( Optional ) Scanner Used: Tech 2
( Optional) Fault Codes: P0400

Hi

We have this Corsa with a long cranking time [about 10 seconds]

DTC P0400 Exhaust Gas Recirculation Flow Excessive.

The valve was removed and was found to be stuck open, a new quenuine unit was fitted.

The PCM has sometime in the past been repaired/replaced, but it was before this customer owned this car, but, the software was the wrong one for this cylinder head. This car has the later cylinder head and we reflashed the PCM with the correct software from TIS2WEB.

We found the pipe from the rocker cover to the throttle body was blocked at the body, this was cleaned and now is clear.

We smoke tested the intake and all was well

Fuel pressure is 55psi and flow is good.

Battery voltage and current, cranking and running, is good.

PCM, coil, and injectors have correct voltage and earth, cranking and running

If I blank the EGR the car starts well every time. My question is, does this engine require the EGR to be blanked when up to date software is programmed? I have read about other engines but not this one, and I dont want to just patch this car up just to get it out the door unless it is the correct thing to do.

Regards

Simon Forsey

Re: Vauxhall Corsa P0400 EGR Fault

Posted by Chris Angus <iframe src='https://members5.boardhost.com/ukautotalk4/info/user=UKAT5111' width='330' height='300' border=0 style='border:none;'> on June 5, 2014, 11:46 am, in reply to "Vauxhall Corsa P0400 EGR Fault"

When you go through the programming in tis, it will tell you what the software version is and will say if it's for egr dissable, if so yes you will need to fit the blanking gasket.
If you didn't see this then you will have to go through the software update again and read what it says, to double check.

Re: Vauxhall Corsa P0400 EGR Fault

Posted by Simon Forsey <iframe src='https://members5.boardhost.com/ukautotalk4/info/user=UKAT5231' width='330' height='300' border=0 style='border:none;'> on June 5, 2014, 8:57 pm, in reply to "Re: Vauxhall Corsa P0400 EGR Fault"

Hi Chris

It only mentioned 'new cylinder head version'

I will take another look at the car tomorrow.

Many thanks

Simon

Re: Vauxhall Corsa P0400 EGR Fault

Posted by Chris Angus <iframe src='https://members5.boardhost.com/ukautotalk4/info/user=UKAT5111' width='330' height='300' border=0 style='border:none;'> on June 5, 2014, 9:06 pm, in reply to "Re: Vauxhall Corsa P0400 EGR Fault"

It won't have egr disable then.

What is the egr feedback voltage in live data with ignition on only?

Just had a thought, I could be wrong but I have a feeling the newer models had a modified head that didn't have the egr fitted.
Have you driven it with the egr blanked? If it doesn't log any dtc's then it would be safe to assume it will be ok

Re: Vauxhall Corsa P0400 EGR Fault

Posted by Alan Lange <iframe src='https://members5.boardhost.com/ukautotalk4/info/user=ukat3293' width='330' height='300' border=0 style='border:none;'> on June 6, 2014, 8:23 am, in reply to "Re: Vauxhall Corsa P0400 EGR Fault"
Alan Lange

I'm sure Chris is right, the newer head had the place where the egr valve was fitted but its not drilled out.

Re: Vauxhall Corsa P0400 EGR Fault

Posted by Simon Forsey <iframe src='https://members5.boardhost.com/ukautotalk4/info/user=UKAT5231' width='330' height='300' border=0 style='border:none;'> on June 7, 2014, 1:41 am, in reply to "Re: Vauxhall Corsa P0400 EGR Fault"

Hi guys, thanks for you replies

The new style of cylinder head has got the ports drilled. We blanked it of and it drives well without logging any codes.

We will drive it over the weekend and see how it goes.

Regards

Simon

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