Code Definition

C1157 — Park Brake Actuator Assembly Switch Applied Circuit Failure

System: Chassis  |  Type: Manufacturer-Specific  |  Make: Generic

About C1157

C1157 is a manufacturer-specific chassis diagnostic trouble code. It belongs to the C-prefix family of codes, which covers chassis, braking, steering, suspension, or stability-control faults.

When C1157 is stored, the module has detected an electrical-circuit fault in the wiring, connector, or driver associated with the named component.

Scanning & clearing: Chassis (C) codes are stored in the ABS, traction control, or stability-control modules. An enhanced or OEM-level scan tool is usually required to read and clear them.

C1157 is a manufacturer-specific code. The same code string on a different make may have a different meaning. Always confirm the code's definition against the vehicle's service information for the specific make and model under test.

Code Information

The electronic park brake (EPB) system uses an actuator assembly to apply and release the parking brake electrically, with an applied switch or sensor that confirms when the brake has reached the applied position. DTC C1157 sets when the control module detects a failure in the park brake actuator assembly applied switch circuit, meaning it cannot obtain a valid signal confirming the park brake has been applied. This may be due to an open or shorted switch circuit, a failed applied position switch, or wiring problems between the actuator and the module. When this code is set, the EPB may not op...

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