The C3 has drive by wire technology, the fault mentioned
is a very common fault in DBW systems. It means the sensor that gives the
acelleratorpadlle position to the
MM system is not always present.
The result of this is the MM system switching to a safe
driving mode, wich results in severe power loss.
Cleaning any connectors in the sensor circuit or
replacing will solve the problem. Replacing is the
last thing you would like to do, the sensor is a very
I've got a throttle problem - sometimes - in as much as taking the foot off
of the throttle doesn't always slow the car down.. especially at around 35 -
40 mph.. sometimes it tends to speed up a bit. Its been back 5 times, but
they say 'nowt wrong'.. I reckon l'm going to sell it - shame really 'cos
its comfy to drive... its an 03 reg diesel, 10,000 miles. Any suggestions
what the problem may be please?.
Don't sell a good car.You have a solvable problem. The symptoms are the same
as is used on racing
motorcycles. It is called a back-torque slipper clutch which allows bikes to
free-wheel into a corner.Definitely sounds like
a software fault. Perhaps they incorporated it in error.
Go back to the dealer as you are in warranty and
that they contact the manufacturer and get it fixed.
Hi Icedog... thanks for the help. Went back.. but told its a bit different
to a bike --- blar blar. Don't really want to sell the thing, but this
accelerator problem is driving me nuts-- the damned thing wont do it when
they go for a test run...... thanks anyway. Ramon.
Sorry couldn't help. Of course, unlike Honda and Suzuki, Citroen don't make
bikes so may not even be aware that this facility exists as it is leading
edge thinking, as was paddle gearchange a few years ago. AFAIK there is no
actual clutch plate, merely a computer
program module which part disengages the clutch on the overrrun. It would
linked to the electronic throttle. Hence a software matter, perhaps
designed to improve fuel consumption.(anyone else out there
with no braking on overrun?).
For what it is worth my 2002 C3SX auto works perfectly, in fact if anything
there is too much braking effect when I lift off. Of course it ante-dates
Good luck - if you get a result please re-post with findings.
andrewl ( email@example.com) gurgled happily, sounding much like they
were saying :
An intermittent fault in the signal from the Throttle position sensor,
then. In other words, the ecu doesn't know what the throttle's doing, so
can't tell how much fuel to inject.
Probably just a duff connection somewhere.
Allright, the throttle position sensor measures how much you press the
pedal, there's a variable resistor in it.
In fact, for security reasons, there are TWO variable resistors.
The measurements are compared, if they differ too much, the most likely
value is taken. Also an error code will be stored, and the engine
warning light will come on.
No engine/environmental harm, and no drivebilityproblems, until the
other one stops working...
You should ask your dealer to just replace it (it's under warrenty I
I have a Citroen C3 SX, 52 reg, mine does the same, i have been to main
dealer who told me they have fitted a resistor and updated the software, has
only happened once since then. I have found that it occurs when the engine
is just getting towards its normal temperature, i have found though that if
park up and switch off everything, except the hazard lights!, and restart
after a few moments all is ok again
Mine will drive again too if I do what you describe. However, the little
fault light does not go off! In the end, they replaced the "throttle body"
and since then (touch wood!) it has not happened again. When it does happen,
it is quite scary as you lose all power. So far it hasn't happened on the
motorway, but I hate to think what I'll do if it does!
Incidentally, the latest problem with my C3 is that there is a
creak/knocking noise from the pillar between the doors (driver's side).
Dealership says some bodywork needs welding back together and it is a common
fault! Very reassuring!
I bought my C3 new and in the 18 months I have had it, it has been back to
the dealership 10 times due to faults (ie not for servicing). I would not
advise anyone to buy a C3!
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