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P0559 Brake Signal

Posted: Sun Mar 22, 2020 5:23 pm
by Splitpin
Has anyone come across the following fault on a 2014 1.6Hdi 115 with piloted gearbox, and what had to be done to cure it?

P0559
- Brake Signal
- Coherence
- Intermittent

All the results I've found mention brake booster, but this was flagged in the Gearbox ECU.

Regards,

Graham.

Re: P0559 Brake Signal

Posted: Mon Jul 06, 2020 8:47 pm
by Splitpin
Further to my previous post, the fault has now escalated and now the engine won't even turn over, and just keeps bleeping at me.
The car has flagged faults in the following ECUs
ESP, Electric Parking Brake and Gearbox.
However, when I plug my diagbox v7.83 in to the diagnostic socket, the faults that are returned say no communication with the gearbox ecu.
When I try to read the gearbox ECU, it now comes up with ECU not recognised. I have had the gearbox ECU tested at BBA reman and it came back no fault found. Prior to having it tested, diagbox couldn't even communicate with the ECU.
Anyone have any ideas as to the cause or know a good peugeot auto electrician in the NW Kent area?
TIA
Graham.

Re: P0559 Brake Signal

Posted: Wed Oct 18, 2023 5:41 pm
by Diddybond
Probably water corrosion within the fuse box connectors