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C0615 — Park Brake Control Module Control Circuitopen

Generic OBD-II · all makesChassis

C0615 indicates an open (disconnected or broken) circuit in the park brake control module, meaning the PCM is not receiving a proper signal from the module that monitors and controls the electronic parking brake.

Symptoms

What causes it — most likely first

1. Faulty park brake control module

The module itself has failed internally, breaking the signal path to the PCM.

2. Wiring harness damage or corrosion

Broken wires, frayed insulation, or corroded connectors in the circuit can create an open condition.

3. Loose or poor connector at the module

A connector that is not fully seated or has bent pins can interrupt the signal.

4. Blown fuse or fuse‑related power loss

A fuse that supplies power to the park brake module may be open, preventing the module from operating.

5. PCM communication failure (rare)

Only after ruling out the module and wiring should a malfunctioning PCM be considered, as it is uncommon.

How it's diagnosed

  1. Scan for additional related codes and verify the parking brake warning light status.
  2. Inspect the park brake control module wiring harness for visible damage, corrosion, or loose connectors.
  3. Check the fuse(s) that supply power to the park brake module and replace any that are open.
  4. Perform a continuity test on the module’s signal wire(s) to confirm an open circuit.
  5. If wiring and fuse are good, bench‑test or replace the park brake control module and re‑scan.

Code facts & related codes

SystemChassis
StandardizationSAE generic — identical on every make
Related codesC0610 — Right Park Brake Actuator Control CircC0611 — Right Park Brake Actuator Control CircC0612 — Right Park Brake Actuator Control CircC0613 — Right Park Brake Actuator PerformancesC0614 — Right Park Brake Actuator StuckC0616 — Park Brake Control Module Control Circ

Frequently asked

Can the PCM be the cause of a C0615 code?

It is possible but extremely unlikely. The PCM is usually the recipient of the signal, not the source of an open circuit. Replace the PCM only after all module, wiring, and fuse checks have been exhausted.

Will the parking brake still work if this code is set?

In many vehicles the electronic parking brake will default to a manual or fail‑safe mode, allowing the brake to be engaged mechanically, but the electronic control may be disabled.

Is it safe to drive with a C0615 code?

Driving is generally possible, but you lose electronic parking‑brake functionality, which can affect convenience and safety, especially on inclines. Repair is recommended as soon as practical.

Why do some technicians suggest replacing the PCM for this code?

Some shops default to PCM replacement because it is a costly component, but in real‑world experience the PCM is rarely at fault for C0615. The correct approach is to verify the module, wiring, and fuses first.