Low side trailer switch short or open circuit detected - Internal to Hardware.
<0.01% (Extremely rare)
Parking brake functions degraded
Parking brake may not apply or release
Loss of trailer functionality
Low side trailer switch short or open circuit detected - Internal to Hardware.
Hardware issue detected with the trailer low side switch
Reseting the ECU may clear the alert, otherwise replacement may be required
Semitruck
customer, service-fix
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