Code result
U0135
Lost Communication with Parking Brake Control Module
High severity
What it means
The vehicle network has lost the electric parking brake (EPB) controller. Auto-hold is disabled, the EPB warning lamp comes on. EPB cannot be released electrically.
Is it safe to drive?
No — stop driving
This code can put the vehicle into limp or reduced-power mode. Avoid extended driving and have the vehicle diagnosed promptly.
Most likely causes
EPB module unpowered
highOne of the most commonly reported causes for this code — check this first.
CAN wiring to EPB damaged
mediumA plausible cause — test and verify before replacing parts.
Gateway module routing CAN messages incorrectly
lowLess common, but worth ruling out after the more likely causes.
Related help
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