2007 Citroen C5 loss of power

Car: Citroen C5
Year: 2007
Variant: 2.0 HDI AUTO
Categories: Running Rough, Starting & Power Loss
Overnight my C5 2.0 HDI auto has lost power. It starts and runs absolutely fine but has no power when you put your foot down. It is not in limp home mode as it will still reach motorway speeds but it just takes a lot longer. It is as if the turbo is not working. There is no smoke coming from the exhaust. Diagnostic has not found the fault. I dont want to replace the turbo if it is possibly caused by something else. Could it be the air regulator on the intake or the Exhaust Gas Recirculation Valve. PLease help, before this get expensive.
Posted: Jun 10, 2010 (13 years ago)
i would look at data list on a scanner,check throttle opening reaches 100%
fuel rail pressure is over 1200 bar
no codes are registered
note limp home mode on the hdi restricts the engine load so even in limp home it can make high mph
there is a lot of different checks can be done with the right scanner in the right hands
note hdi engines do suffer from air flow meters and they can lie to a scanner,carefully remove meter check for signs of burning,we tend to fit one from anothre car if ones suspect(easy is a second car is in stock)good luck
Posted Jun 10, 2010 (13 years ago)
I would check all air pies to ensure non have split.Also check vacuum pipes to solenoid valves.
Posted Jun 10, 2010 (13 years ago)
hi it could be a blocked exhaust its just a guess doe
Posted Jun 10, 2010 (13 years ago)
so what was fault?
Posted Jul 31, 2010 (13 years ago)
I have a C5 diesel estate 2003 HDI 110bhp. If I have left the car sat for say 4 hours or more, when I start it, it starts fine but for the 1st 5 minutes or so of driving it there is no power but then after the 5 minutes the power kicks in all of a sudden. Can any please help with this. I have had a new battery just put on and glow plugs, it was doing it before I changed them just for reference. Thank you.
Posted Jan 9, 2014 (10 years ago)
I have the same problem as darreng
it is fine when warmed up but no power when cold
anti pollution and ASP lights on but go out if I start a few times when warm
Posted Apr 8, 2020 (4 years ago)

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