Not Starting - Fault Code P1612

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

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Posts: 2
Joined: Fri Mar 09, 2012 1:41 pm

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Hi,

My Citroen C3 1.3 Petrol 2003 is not staring. The engine turns over but no start.

Fault code showing on OBD reader is P1612. Anyone have any information on this fault code or ideas why its not staring?

Thanks!
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My Name: C3driver52

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Posts: 2012
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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Mobi wrote: My Citroen C3 1.3 Petrol 2003 is not staring. The engine turns over but no start.
Hi Mobi

Sounds like an immobiliser problem. (Faulty immobiliser communication to BSI/ECU)

Have you had any work done on the car or keys recently before the fault appeared?

Time to dig out the security card from the handbook folder if its going to citroen for diagnosis.

Have you done anything after getting this problem, like checking all the fuses (fuse box locations topic) etc
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My Name: Mobi

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Posts: 2
Joined: Fri Mar 09, 2012 1:41 pm

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C3driver52 wrote:
Mobi wrote: My Citroen C3 1.3 Petrol 2003 is not staring. The engine turns over but no start.
Hi Mobi

Sounds like an immobiliser problem. (Faulty immobiliser communication to BSI/ECU)

Have you had any work done on the car or keys recently before the fault appeared?

Time to dig out the security card from the handbook folder if its going to citroen for diagnosis.

Have you done anything after getting this problem, like checking all the fuses? etc
Thanks C3Driver52, No work done to the Car or keys, parked in a shopping centre car park, came back wouldn't start. I'll check those fuses thanks.
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My Name: C3CAR

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Posts: 2744
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)
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P1612 , turns over, but won't start is a immobiliser problem.

Usually the key is the problem. There is a immo chip in the key fob and if this has moved from its correct position or not been replaced after fitting a new pip battery then you get P1612, a non starter.
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My Name: Ozvtr

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Posts: 1199
Joined: Wed Jul 10, 2019 3:31 am
Model: C3 2002-2005, Original shape model
Year: 2003 (53)
Engine Size: 1.4 (8v)
Fuel Type: Petrol
Mileage: 80000
Trim Level: Other
Gearbox: Automatic PRND
DPF: No
LHD or RHD: RHD
Engine name: TU3 (75 PS)
Location: Brisbane, Australia.
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A bit of light reading on how the immobilizer system works here.

If the car unlocks with the remote fob, then the car side of the immobilizer is probably OK. As the fob receiver also decodes the immobilizer chip.
Fault might be in the key I.E. the RFID chip.

You could try a BSI reset (cant hurt).
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