Reference meaning
What does this code mean?
The wording below belongs to the named make and communication. Match the complete code, reporting module, model year and engine before applying it.
A code identifies a detected condition, not a part that must automatically be replaced.
Narrow by vehicle
A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.
Before replacing a part
Record codes and freeze-frame data. Check battery condition, related codes and visible wiring or hose damage. Follow the vehicle's diagnostic procedure and test results before replacing parts.
Scan worksheet →Manufacturer wording
Source wording can vary by vehicle and suffix. It is shown as written, not as a universal diagnosis.
P1055Valvematic Angle Difference [ECU]
Manufacturer communications
5Original wording in English
VOLVO
Volvo Chassis - Redundant Brake Switch Test - Code MID136 SID55 FMI2, or( DTC ) P1055
MACK
Mack Chassis - Diagnostic Trouble Code ( DTC ) P105594 Brake Switch Status - Special Instructions
VOLVO
Volvo Chassis - Diagnostic Trouble Code ( DTC ) P105594 Brake Switch Status - Special Instructions
VOLVO
Volvo Chassis - Redundant Brake Switch Test - Code MID136 SID55 FMI2, or( DTC ) P1055
Check vehicle applicability
29A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.
Can I keep driving?
A code alone cannot establish whether driving is safe. A flashing malfunction light, severe shaking, overheating, oil-pressure warning or loss of braking or steering needs prompt attention. Stop in a safe place and seek assistance when control or engine safety is affected. Follow the vehicle handbook.