"Gearbox Faulty" but driving OK

If you have Automatic gearbox problems or issues that would only affect an Auto, please ask here.

Please provide as much information as possible including photos you have taken and uploaded directly to the topic.
Forum rules
One question per topic about an Auto or semi-auto gearbox can be posted in this section
No engine questions
Think: Auto not changing up or down, snowflake/sport flashing, flappy paddles, actuator fault and sensodrive not changing gear.
My Name: hope22

Member
Posts: 2
Joined: Tue Jul 24, 2018 11:46 am
Model: C3 2009-2013, New shape (A51)
Year: 2010 (10)
Engine Size: 1.6
Fuel Type: Petrol
Mileage: 60000
Trim Level: Exclusive
Gearbox: Automatic PRND
DPF: No
LHD or RHD: RHD (UK)

Post

Hi all!

so my partner has an auto c3 2010 with 65k on the clock we only bought it in march.

yesterday as she was driving along the service light came on with the "gearbox faulty" warning on the centre console :cry: . the snowflake and s are also flashing. The warning is not on constantly and varies when it does show up.

There is NO jerking/juddering when changing gears and it will go from 1st to 4th without missing a beat. It drives spot on like it always has.

Plugged into a diagnostic and was showing 'unknown error code' and was unable to reset.

Has anyone got a solution to this? I have seen a few threads but none had a confirmation of an answer.

Cheers!
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My Name: Arfur Dent

Guru
Posts: 3303
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)
Has thanked: 258 times
Been thanked: 111 times

Post

hope22 wrote: Tue Jul 24, 2018 2:12 pm Hi all!

so my partner has an auto c3 2010 with 65k on the clock we only bought it in march.

yesterday as she was driving along the service light came on with the "gearbox faulty" warning on the centre console :cry: . the snowflake and s are also flashing. The warning is not on constantly and varies when it does show up.

There is NO jerking/juddering when changing gears and it will go from 1st to 4th without missing a beat. It drives spot on like it always has.

Plugged into a diagnostic and was showing 'unknown error code' and was unable to reset.

Has anyone got a solution to this? I have seen a few threads but none had a confirmation of an answer.

Cheers!
Hi

You can't diagnose this further without reading the gearbox ecu fault code. Use a lexia /digbox tool to read the code or take it to a dealer who will read the code. Make sure they tell you what the code is. 'unknown error..' is just that your code reader is not compatible with the gearbox ecu.
You can add an avatar to your account - Avatar or change your vehicle details - Car Bio or even add a signature to your posts - Signature. But this is not all you can do in the User Control Panel :)
My Name: hope22

Member
Posts: 2
Joined: Tue Jul 24, 2018 11:46 am
Model: C3 2009-2013, New shape (A51)
Year: 2010 (10)
Engine Size: 1.6
Fuel Type: Petrol
Mileage: 60000
Trim Level: Exclusive
Gearbox: Automatic PRND
DPF: No
LHD or RHD: RHD (UK)

Post


Hi

You can't diagnose this further without reading the gearbox ecu fault code. Use a lexia /digbox tool to read the code or take it to a dealer who will read the code. Make sure they tell you what the code is. 'unknown error..' is just that your code reader is not compatible with the gearbox ecu.
Thanks!

Garages want anywhere from £50-£110 to diagnose and the lexia tool is only £40 to buy so will purchase one and give it a go.

Forgot to add yesterday that the cruise control is not working (has been working fine and only not since the gearbox fault) and when scanning the engine with the reader is showing cruise control speed limiter fault. I'm not sure if this is a knock on effect of the gearbox fault.

Will get a lexia and see what it comes up with.
User avatar
My Name: C3CAR

Guru
Posts: 2610
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: 144 times
Been thanked: 88 times

Post

hope22 wrote: Wed Jul 25, 2018 12:32 pm

Thanks!

Garages want anywhere from £50-£110 to diagnose and the lexia tool is only £40 to buy so will purchase one and give it a go.

Forgot to add yesterday that the cruise control is not working (has been working fine and only not since the gearbox fault) and when scanning the engine with the reader is showing cruise control speed limiter fault. I'm not sure if this is a knock on effect of the gearbox fault.

Will get a lexia and see what it comes up with.
Well, lexia does need a laptop and a fair bit of 'know how' witch computers if you are not running 32 bit windows 7

There is a topic on lexia here - Lexia and OBD diagnostics on a Citroen C3.
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