engine light- P0223, P0228 and P0420

Questions specifically about a Petrol powered Citroen C3 (usually engine or fuel related problems).
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My Name: jrichard50

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Posts: 2
Joined: Mon Mar 12, 2012 2:02 pm

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hi everyone,
only had my >> c3 about 4 weeks. drives really well but, the engine management light comes on about every two weeks.

i can get this taken off but need to find out if this is a serious problem or not.
the codes are the same every time P0223, P0228 and P0420. car is a 1.4 2003 petrol model.
i'm new here so any advice on commom faults that can bring up these codes would be great. thanks everyone. ;)
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My Name: C3driver52

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Posts: 1877
Joined: Sat Apr 30, 2011 7:40 pm
Model: C3 2002-2005, Original shape model
Year: 2003 (03)
Engine Size: 1.4 i
Fuel Type: Petrol
Mileage: 79984
Trim Level: VTR+
Gearbox: Manual 5 speed
DPF: No
LHD or RHD: RHD (UK)
Engine name: TU3 (75 PS)
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jrichard50 wrote: the codes are the same every time P0223, P0228 and P0420.
The codes you are having are:

P0223 and P0228: Throttle Pedal Position Sensor problems

and

P0420 is the catalytic converter problem

I don't know if there is a link between the cat and the throttle position codes, or if you are having 2 different and unrelated errors.

I think you will need to dig a bit deeper than a general purpose OBD scanner and get it connected to a lexia type to get more indepth analysis.
But at least it give you somewhere to start. (well 2 places to start).

Hopefully someone else will know a bit more about the petrol common faults than me.
My Name: jrichard50

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Posts: 2
Joined: Mon Mar 12, 2012 2:02 pm

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Thanks for your reply. Do you know where the Pedal Position Sensor is located.
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My Name: Arfur Dent

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Posts: 3340
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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The Throttle Pedal Position Sensor is part of the accelerator pedal assembly.
(you get to it from the drivers footwell)

The throttle potentiometer and throttle valve positioner motor are part of the throttle housing body

The Throttle Pedal Position Sensor connects to the ECU which connects to the throttle valve position motor.
Cruise control gets a bit involved too.
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