Central locking unlocking itself?

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My Name: Tomd2712

Member
Posts: 1
Joined: Mon Aug 24, 2020 12:06 pm
Model: C3 Picasso
Year: 2015 (65)
Engine Size: 1.6 (16v)
Fuel Type: Diesel
Mileage: 33000
Trim Level: Other
Gearbox: Manual 5 speed
DPF: No
LHD or RHD: RHD (UK)
Engine name: BlueHDi (75 PS)

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Bit of a strange one and dealership won't look af it yet as staff are still on furlough so only doing"essential" jobs.
I can lock my car using central locking remote and most doors (both drivers side, boot and rear passenger) lock and stay locked using the remote.
However, the front passenger door locks, but if you pull the exterior door handle it unlocks all the central locking. All the other doors lock and stay locked like normal.
If I do the central locking on the remote, then use key to manually lock passenger door it locks and stays locked, though this then either has to be unlocked with the key or from the inside. Central locking then doesn't unlock it.
Any ideas of what could be causing it/how to fix before the dealership starts working fully again or will it be a case of just suck it up and wait? Haha
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My Name: C3CAR

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Posts: 2815
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)
Has thanked: 220 times
Been thanked: 109 times

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Tomd2712 wrote: ↑Mon Aug 24, 2020 12:14 pm Bit of a strange one and dealership won't look af it yet as staff are still on furlough so only doing"essential" jobs.
I can lock my car using central locking remote and most doors (both drivers side, boot and rear passenger) lock and stay locked using the remote.
However, the front passenger door locks, but if you pull the exterior door handle it unlocks all the central locking. All the other doors lock and stay locked like normal.
If I do the central locking on the remote, then use key to manually lock passenger door it locks and stays locked, though this then either has to be unlocked with the key or from the inside. Central locking then doesn't unlock it.
Any ideas of what could be causing it/how to fix before the dealership starts working fully again or will it be a case of just suck it up and wait? Haha
Hi

Most of these odd door locking problems similar to the one you describe are down to the door solenoid. That's the bit that does lock. unlock, deadlock, door open and door closed signals. You have to remove the door card and cut the plastic sheet to access the door solenoid. These door solenoid is suitably tricky to remove but are a common failure.
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