Help diagnosing C4 VTS problems (Ex Davie LEZ VTS 180)

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Re: Help diagnosing C4 VTS problems (Ex Davie LEZ VTS 180)

Post by Fake Concern » 03 May 2018, 20:19

RichardW wrote:
03 May 2018, 12:41
It doesn't appear to have a MAF, so not sure how it is picking up a flow coherence error. I can't see an EGR valve either, but I suspect it has one? Does it have a fuel filter, and has it been changed?

The fuel filter is just a strainer in the tank, not likely to have been changed, but if it was blocked wouldn't it be giving an error for running lean?
RichardW wrote:
03 May 2018, 13:16
Yes, I saw that, but it calls it an 'air pump' not an EGR valve :?

There is also a vac solenoid on the air intake circuit, but there's no indication what it's for!!


I believe the vac solenoid is to open the second intake on the air resonator at higher revs.

Another question, if the timing belt had been put on one tooth out, could that give the errors we have? Presumably the valve timing being out would affect both intake and exhaust flow?
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Re: Help diagnosing C4 VTS problems (Ex Davie LEZ VTS 180)

Post by Fake Concern » 04 May 2018, 22:25

Starting seem like I'm clutching at straws now! However, this article is very interesting

http://enginedtc.com/p1161-citroen-c4

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Re: Help diagnosing C4 VTS problems (Ex Davie LEZ VTS 180)

Post by xantia_v6 » 05 May 2018, 06:37

Fake Concern wrote:
04 May 2018, 22:25
Starting seem like I'm clutching at straws now! However, this article is very interesting

http://enginedtc.com/p1161-citroen-c4

Image

I would not take that site seriously at all. It is just a collection of generic OBD codes which have generic descriptions and the name of a specific car model attached. They couldn't even give a valid engine type for the C4. Does anyone here have a C4 with a turbocharged single cylinder engine with opposed pistons?
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Re: Help diagnosing C4 VTS problems (Ex Davie LEZ VTS 180)

Post by Fake Concern » 13 May 2018, 20:49

I am now totally confused by this!
I finally got Lexia/Diagbox to work again after reinstalling Windows three times due to Lexia refusing to install without errors. Now I have these faults
IMG_5205.JPG
IMG_5206.JPG
IMG_5207.JPG
So now a missfire? Could that be a failing Coil pack?
Also P1623-Engine torque given *1 What does this even mean?
Plus what was interpreted as intake manifold leak P1160, is now shown as incoherence between butterfly position and 1 wire/pressure
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Fake Concern, Citroen C4 VTS 2007
Mrs Concern, Renault Moodus 1.6 Privilege 2004
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Re: Help diagnosing C4 VTS problems (Ex Davie LEZ VTS 180)

Post by xantia_v6 » 13 May 2018, 21:22

If you look at the mileage and engine RPM where each of those faults occurred, how do they relate to when the car went into limp mode?
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Re: Help diagnosing C4 VTS problems (Ex Davie LEZ VTS 180)

Post by Fake Concern » 13 May 2018, 21:46

xantia_v6 wrote:
13 May 2018, 21:22
If you look at the mileage and engine RPM where each of those faults occurred, how do they relate to when the car went into limp mode?

No idea, somehow this time the report didn't get saved, so I only have the photos. I cleared the faults and will drive it a bit before reading any codes again.
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