Snowflake popped up after black box fitting

Wondering whether anyone could offer some advise? Petrol 1.4 SemiAuto 2004

After having my black box fitted I drove less than 10 miles down the road, was sat in the McDonald’s drive through and then the snowflake started flashing at me! Car was revving but not moving. Then after being pushed out the way, I put my key in (didn’t attempt to start it), battery flashing at me and in eco mode. RAC came out and then all was fine! He rang diagnostics, nothing came out, he drove it around, no problem, all he said was that the clutch actuator could be heard changing gear so take it to the garage to be checked.

I drove it 500 miles before the black box, no problems. The garage have had a look at everything, nothing comes up on diagnostics, my actuators fine and so is my battery. The black box company is saying the issue is my battery but my car was parked at the garage for 4 days and started first time yesterday, and the volt meter also confirms it’s fine.

Is there something that could’ve caused this snowflake that won’t be picked up when the cars fine or something? The black box was wired somewhere in my foot wells while my ignition was turned on.

Hi Jademarie2305

Jademarie2305 wrote: ↑Thu Aug 01, 2019 6:35 pm Is there something that could’ve caused this snowflake that won’t be picked up when the cars fine or something?

Yes and No.

Yes, because not all code readers are created equally. Some are better than others, while lexia (info here) is the only one that will test everything on the C3 with 100% success.

Jademarie2305 wrote: ↑Thu Aug 01, 2019 6:35 pm The black box was wired somewhere in my foot wells while my ignition was turned on.

It is probably connected to the OBD port, but if not, then its connected to the OBD port wiring.

There are two times the “snowflake of death” will appear.
1 It comes on if you are on a loose surface (ice) and there is slippage in the drive wheels. This is just to warn you that you are loosing traction.
2 When it flashes along with the AUTO symbol.
In the second case the Sensodrive ECU has detected a fault in the system. Now, with some faults the ECU will let you continue and some faults it will not allow you to start the car. It won’t stop the car while it’s driving (goes into “limp” mode) but it won’t allow you to start the car. Make sense?
The most common failure mode of the Sensodrive system is sticking or worn carbon brushes in the clutch actuator motor. This can produce symptoms like you experienced, where the engine revs but you don’t go anywhere. The actuator goes into failsafe and engages the clutch but the ECU can’t move it.
Now, I do not know how Blackbox interfaces with the car. As Citroen-driver said it may be connected to the OBDII port. Could it interfere with the Sensodrive? Anything is possible…but I doubt it.
If I were you I would take the car to your local Peugeot…yes…Peugeot dealer and get a list of faults from the cars system. Then DRIVE AWAY!!!! Why Peugeot? They seem to be more professional and better trained than Citroen! Why drive away? Because they will want an arm and a leg to fix it and you will need time to think about it. Just find out what the car says is wrong and go from there.