what is this fault ?

Questions specifically about a Petrol powered Citroen C3 (usually engine or fuel related problems).
Forum rules
One question per topic.
Petrol engine related faults, like injectors, error codes, overheating.
You can post more topics if necessary, but only one question per topic.
User avatar
My Name: simuzer

Experienced Member
Posts: 58
Joined: Thu May 02, 2013 1:39 pm
Model: C3 2002-2005, Original shape model
Year: 2002 (02)
Engine Size: 1.4 i
Fuel Type: Petrol
Mileage: 218000
Trim Level: SX
Gearbox: Other
LHD or RHD: LHD (Europe)
Engine name: TU3 (75 PS)
Location: istanbul - Turkey
Has thanked: 9 times
Been thanked: 3 times


I have met once before with this malfunction.

1) The fuel is full but it seems to be finished,
2) The range of motion of the vehicle (estimated 50-70 km / h), but the speedometer appears to be zero,
3) In economical mode, but the snow-sport light is flashing at the same time (normally this gearbox is faulty but nothing like that),
4) Warm 3 is on the line but only one line appears,
5) The handbrake is not towed, the handbrake looks towed,
6) There is no ABS fault but the light is on,
7) The total / daily mileage counter looks normal but ---- (line)
8) The lighting level of the screen panel is brighter, but a bit lower in this way,
9) If the engine is stopped and the key comes out, the bilevel display continues in the same way.

1) there is no problem in running the car, stopping the gears and running the radar and radio screen. He works very well.
2) I did not give an audible warning when I was going to this fault during normal operation (I was on the move), the car did not shake. I did not feel it.
3) There was excessive rain yesterday.

Remove the battery connection cable and wait for 10 seconds and reconnect.

I have encountered this fault once before. About 1-3 years ago (I do not remember it in time, I do not know if it was rain anymore)

My question;
1) What is your situation / problem?
2) Can it be related to water?
3) Where is the car's brain located on this vehicle (2003 c3)? Could it be moistened with water, spraying water from the spraying water to the spraying water after the spraying of the water (I do not know how to describe it)?

You can see fault..
User avatar
My Name: C3CAR

Posts: 2816
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
Engine name: DV4 16-valve diesel (90 PS)
Has thanked: 220 times
Been thanked: 109 times


It looks like a bus lockup.

The bus carries the signals for speed, gear and other information to the display (and all the other ECUs). There are different busses for different systems and the one that has locked up is the one that is for information display.

Resetting the computers resets the bus and it all starts working.

What locked up the bus? Its going to be difficult to find, any faults from Lexia?
  • Similar Topics
    Last post

Return to “Questions about a Petrol powered Citroen C3”