Help - Electronic handbrake errors Mk4 Leon FR 1.5 TSI - P062F and U0121

[C_ED_99]

Could the forum help?
We've two Leon's in the family, and hers had been running fine. Last night it was driven a couple of miles to a family members birthday party*. On parking it was fine.

*It was a short trip, we didn't hit any potholes or have any other concerns or issues with the car

When we went to leave the dash lit up like a Christmas tree (see below)

The main problem is the electronic parking brake is locked on, so we cant move the damn thing to even take it to a garage.

With so many errors I'm guessing one of the (E)CUs has an issue?

I plugged an OBD reader in there now and got two codes -
Current Fault P062F - Internal Control Module EEPROM error
U0121 - Anti-Lock brake system control module no communication - though on turning the ignition off and on again this "cleared" itself

Is there a way to force reset the handbrake?

Any advice appreciated as the car is July 2020, so just out of warranty

 

[serdar_18fr]

Could the forum help?
We've two Leon's in the family, and hers had been running fine. Last night it was driven a couple of miles to a family members birthday party*. On parking it was fine.

*It was a short trip, we didn't hit any potholes or have any other concerns or issues with the car

When we went to leave the dash lit up like a Christmas tree (see below)

The main problem is the electronic parking brake is locked on, so we cant move the damn thing to even take it to a garage.

With so many errors I'm guessing one of the (E)CUs has an issue?

I plugged an OBD reader in there now and got two codes -
Current Fault P062F - Internal Control Module EEPROM error
U0121 - Anti-Lock brake system control module no communication - though on turning the ignition off and on again this "cleared" itself

Is there a way to force reset the handbrake?

Any advice appreciated as the car is July 2020, so just out of warranty

View attachment 40748 View attachment 40749 View attachment 40750 View attachment 40751 View attachment 40752 View attachment 40753

You might want to get your battery checked before doing anything else.
Weak batteries that are about to die can lead to all kinds of control unit faults, which got cleared when battery replaced.

 

[C_ED_99]

Update - Battery changed and rear wheels removed to reset the handbrake.

Car is still dead and sitting in the garage

 

[Ste 2024]

Hi C_ED_99
did you manage to sort your issue out regarding the parking brake? My car has done a similar thing and won't start or move with a parking brake error displayed before the dash had a fit of blinking on and off like an electrical issue, I can't now move it, I've just checked the battery and it's only showing 10.6 v so I'm going to replace that tomorrow and see if that fixes things.

 

[East Yorkshire Retrofits]

There were software updates for the ABS control module to help with EPB faults. I can’t remember which faults they fixed off the top of my head