Engine light and codes please help

Questions specifically about a Diesel powered C3 (usually engine or fuel related problems)
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Diesel engine related problems
Think: Diesel engine, diesel fuel system, diesel injectors and glow plugs
My Name: harryp

Member
Posts: 2
Joined: Thu Jun 05, 2014 12:01 pm
Model: C3 2002-2005, Original shape model
Year: 2003 (03)
Engine Size: I dont know
Fuel Type: Diesel
Mileage: 99000
Trim Level: VTR+
Gearbox: Manual 5 speed
DPF: No

Post

Hi all, first post so sorry if I get it wrong..

53 Citroen C3 Desire 1.4 HDI with 99k Miles

The engine light came on and says the following:

P0191 - Fuel Pressure Signal Incoherence (Pressure)
P0193 - Fuel Pressure Signal Open Circuit or Short Circuit To Battery
P0658 - Fuel Pressure Sensor Supply Too Low


It seems to start and drive fine.. I've been told it might be a seal on an injector?

Any ideas guys?

HUGE thanks in advance

Kind regards

Harry
User avatar
My Name: C3CAR

Guru
Posts: 2661
Joined: Wed May 04, 2011 10:01 am
Model: C3 2002-2005, Original shape model
Year: 2002 (02)
Engine Size: 1.4 (16v)
Fuel Type: Diesel
Mileage: 140000
Trim Level: Exclusive
Gearbox: Manual 5 speed
DPF: No
LHD or RHD: RHD (UK)
Engine name: DV4 16-valve diesel (90 PS)
Has thanked: 176 times
Been thanked: 93 times

Post

Welcome to the forum harryp
harryp wrote:Any ideas guys?
My thoughts for a diesel C3 with 99K miles is worn injector(s). A simple leakoff test would confirm this.

The second thing could be trouble with the fuel pressure sensor circuit, starting with a contaminated connector on the fuel pressure sensor, all the way up to the engine ECU.

If the leak off test looks OK, I would do further diagnostics with the lexia tool to look at live data for the fuel pressure sensing circuit, delete the codes, look for 'permanent' or 'intermittent' in the code description and follow any tests that lexia suggests.
My Name: harryp

Member
Posts: 2
Joined: Thu Jun 05, 2014 12:01 pm
Model: C3 2002-2005, Original shape model
Year: 2003 (03)
Engine Size: I dont know
Fuel Type: Diesel
Mileage: 99000
Trim Level: VTR+
Gearbox: Manual 5 speed
DPF: No

Post

Many thanks for the advice. I had it all tested and they suspected seals. So had the seals done (no more chuffing noise) and the light went off on it's own.. for a bit. But it's BACK on.

Had it checked, EXACT same codes. Deleted all codes but it keeps on coming back on. But the car drives and starts perfect!? 0 issues from the car.

If you start the car a few times the engine light goes off but then comes straight back on when you drive?

Any ideas guys as we're all very confused
User avatar
My Name: C3CAR

Guru
Posts: 2661
Joined: Wed May 04, 2011 10:01 am
Model: C3 2002-2005, Original shape model
Year: 2002 (02)
Engine Size: 1.4 (16v)
Fuel Type: Diesel
Mileage: 140000
Trim Level: Exclusive
Gearbox: Manual 5 speed
DPF: No
LHD or RHD: RHD (UK)
Engine name: DV4 16-valve diesel (90 PS)
Has thanked: 176 times
Been thanked: 93 times

Post

harryp wrote: I had it all tested and they suspected seals.
Did they do the leak off test? What were the results?
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