Code Definition

C1D00 (11) — Park Brake Apply Switch Circuit Short to Ground

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

About C1D00

C1D00 is a manufacturer-specific chassis diagnostic trouble code recorded for Ford vehicles. It belongs to the C-prefix family of codes, which covers chassis, braking, steering, suspension, or stability-control faults.

When C1D00 is stored, the module has detected a short-circuit (voltage pulled to ground or to supply) in the monitored circuit.

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.

C1D00 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 Parking Brake (EPB) control module monitors the park brake apply switch circuit for correct voltage transitions when the switch is operated. DTC C1D00:11 is set when the module detects the apply switch signal circuit is pulled to ground continuously or at a voltage lower than the calibrated threshold, regardless of switch position. This indicates a short to ground condition, which prevents the module from correctly interpreting driver park brake apply and release requests. When this code is set the parking brake or EPB warning lamp is usually illuminated, a message such as park ...

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