hdi 1.4 8v year 52 (98000 miles) Lacks Power

Questions specifically about a Diesel powered C3 (usually engine or fuel related problems)
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My Name: Arfur Dent

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Posts: 3407
Joined: Sat Jul 23, 2011 3:47 pm
Model: C3 2002-2005, Original shape model
Year: 2002 (52)
Engine Size: 1.4 (16v)
Fuel Type: Diesel
Mileage: 100000
Trim Level: Exclusive
Gearbox: Manual 5 speed
DPF: No
LHD or RHD: RHD (UK)
Engine name: DV4 16-valve diesel (90 PS)
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I have fuel rail pressure sensor code
1164
£75 for the part from citroen were is it and is it an easy job.
cause citreon want £275 to fit it.
Does the code you give (P1164) indicate that the sensor is faulty, rather than the fuel pressure just being low, due to, say, a worn fuel pump, a faulty fuel regulator or the ever so common worn out injector(s)?

I wasn't aware that changing the sensor was something that citroen would do without changing the whole rail.

P1164, so I guessing the part you want to change is the fuel pressure sensor that is fitted to the end of the 'common rail' - the high pressure rail.

If you could identify the part that costs £75, it would be easier to explain where to find it and how to change it.

The fuel rail (common rail) can be found behind the engine, look at the gearbox end for the fuel pressure sensor.
I have added an arrow to bill suttons image showing the common rail fuel pressure sensor
fuel pressure sensor on common rail
fuel pressure sensor on common rail
the original image is here https://citroenc3owners.com/diesel-citro ... -t367.html
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My Name: groundhog2378

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Hi the code was P1164 under it said fuel rail pressure sensor.
citreon didnt say anything about rail they said £200 labour to fit sensor and £75 for sensor £275 altogether.
so will i get this code if the fuel injecors are bad or pump is bad,
i seen the code and the words fuel rail pressure sensor and just assumed it was that,
should i get a fuel pressure test done first before i pay for this sensor.
and do i need to replace the rail.
i have booked it for tuesday so please help
i dont want to spend money on a fuel rail pressure sensor if i am still going to have this problem of lacking power.
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My Name: Arfur Dent

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Posts: 3407
Joined: Sat Jul 23, 2011 3:47 pm
Model: C3 2002-2005, Original shape model
Year: 2002 (52)
Engine Size: 1.4 (16v)
Fuel Type: Diesel
Mileage: 100000
Trim Level: Exclusive
Gearbox: Manual 5 speed
DPF: No
LHD or RHD: RHD (UK)
Engine name: DV4 16-valve diesel (90 PS)
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citreon didnt say anything about rail they said £200 labour to fit sensor and £75 for sensor £275 altogether.
That's good news, cheaper.
the code was P1164 under it said fuel rail pressure sensor.
The codes just tell the experienced technician where to look next, not what part to change.
It is unlikely a citroen diagnostic will only show "P1164 fuel rail pressure sensor" without any information regarding the signal that the ECU is getting from the sensor.

for example
P1164 Permanent Fault - fuel pressure signal pressure coherence
is the sort of thing I would see from a citroen diagnostic, it gives much more information about how the signal differers from expected which is the reason why that particular code has been stored.

For my example, I think a good way to diagnose it would be to check the output of the fuel pressure sensor and find that signal on the engine ECU to see its getting to the computer without being altered on the way. Only then investigate changing the pressure sensor.
so will i get this code if the fuel injecors are bad or pump is bad,
I don't know, if your P1164 is due to poor fuel pressure, then possibly yes as fuel pressure can be affected by faulty injectors or a faulty pump.
i seen the code and the words fuel rail pressure sensor and just assumed it was that,
This is not the way to fix modern cars like the C3, it just doesn't work like that :(
should i get a fuel pressure test done first before i pay for this sensor.
I wouldn't pay £275 for a sensor without testing it first!
I wouldn't spend money unnecessarily (but that's just me). There is a simple test you can do yourself (cheaply), a leak-off test. This tests the part of the injectors that causes low fuel pressure and can give an overall quality view of one or more of the injectors.

A C3 leakoff test results
Leakoff test results from a Citroen C3 diesel non starter or lacks power
Leakoff test results from a Citroen C3 diesel non starter or lacks power

https://citroenc3owners.com/diesel-citro ... -t416.html
There are lots of youtube videos on how to leakoff test.

and some tips for leakoff testing on a Citroen C3 diesel --- here ---
and do i need to replace the rail.
No, if Citroen are happy just changing the sensor, then don't change any more unnecessary parts.
i dont want to spend money on a fuel rail pressure sensor if i am still going to have this problem of lacking power.
I absolutely agree with you. As I wrote above, I personally wouldn't throw £275 at a sensor without at least investigating the output of it and find out what the computer thinks is wrong and what is actually wrong.

Changing a £15 sensor can save the time to diagnose a fault, but sensors are quite robust and its often a connector fault, wiring damage or a worn mechanical part, so the £15 is used to 'prove' that its not the sensor that's causing the problem.

You have had several diagnostic checks by a citroen approved garage and there have never been any diagnostic codes present while you have had this lack of power. All of a sudden, recently a fault has been stored, but the car is still the same. I don't hold much hope that clearing the fault that has brought the code is going to fix the original problem, because if it was, then the code would have been there from the start.
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My Name: C3CAR

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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)
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I was wondering on how this is going?

Did the electric fuel (low pressure) pump in the fuel tank get a look at?

The 'in tank' low pressure fuel pump (HDi engines) on ebay - here -

low pressure fuel pump in the diesel tank on a Citroen C3
low pressure fuel pump in the diesel tank on a Citroen C3
My Name: Francois

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Posts: 5
Joined: Wed Jan 08, 2014 6:06 am
Model: C3 2002-2005, Original shape model
Year: 2002 (02)
Engine Size: 1.4
Fuel Type: Diesel
Mileage: 150000
Trim Level: VTR+
Gearbox: Manual 5 speed
DPF: No

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Hi Have you ever found the problem as i have a 2002 HDI 1.4 with the same problem there is no power (turbo is fine) (Egr system blocked off after removing a blocked CAT) diagnostic says Relay circut for engin light.

Mecanic says injectors faulty.

Ive done full service.
Replaced Turbo waste valve on the turbo

Injector cleaner does not help

Difference is when i drive slow under 2000rpm on strait road it drives fine when i hit a slight hill engine noisy and LOTS of black smoke?

Please help
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