Re: ecu codes, citroen c3 turbo trouble

Fred wrote:
On Wed, 6 May 2009 05:15:02 -0700 (PDT), s1mon.black@xxxxxxxxxxx
wrote:

Google search for the P1351 error code brought this up:

http://www.ilexa.co.uk/forum/index.php?topic=20245.0;wap2


Thanks for your replies; sorry for the delay in replying, I had a few
days away.

I read the above url and it seems the author of that page has a very
similar problem to me; he says:

"This C3 has very little acceleration." - as does mine below 3000 rpm.
"Fault Code P1351 - Pre-heating relay circuit short circuit to
positive. Possible glow plug fault I don't think this is relative to
my fault."

It's funny he should mention this because the glowplug light was on
permanently on my dashboard. Citroen read the code and told me I had a
relay open circuit and replaced the relay. At that point I had not
read the haynes manual so I had not realised I could have changed the
relay myself and saved a lot of money (parts cost £35, parts+ dealer
labour £120 IIRC). Changing the relay made no difference. At that
point they suggested inspecting the glow plugs and it was then that I
picked up Haynes and decided to DIY. I replaced the plugs with a brand
new set and it cured the glowplug light.

It seems a coincidence both of us had these glowplug problems at the
same time as the turbo underboost.

Some people have mentioned vacuum leaks. How do I go about testing for
these? Do I need to buy a gauge; where do I connect it; and what
readings should I get?

Coiuld I also get these readings from hooking up to the car to a
laptop? I downloaded scantool.net and I know that does show some
parameters; does it include the ones I need?

Thanks.



I have checked various live data. Turbo pressure all good. Checked air
flow meter, all ok. and substituted with a known good second hand
unit. Egr valve appears to be ok through live data, haven't checked it
physically yet.
Vacuum gauge on turbo waste gate, all working ok.

With the troublesome vectra I had, no codes actually said low vacuum (which
would be useful), a simple vacuum gauge connected solely to the pump shows
how much vacuum should be available (lots), as soon as the whole circuit was
connected the vacuum dropped to very little (it shouldn't), it was then a
question of logically disconnecting and blanking bits till the faulty
component was isolated and vacuum restored. In my case it was the actuator
for the low speed swirl valve assy (don't ask) which had developed a minor
crack which of course let air in. The whole process of actually isolating
the fault probably took me most of a day. In my case the general direction
of the fault was helped by googling the fault codes together.


.

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