Parking Brake Actuator Switch Circuit Malfunction
Diagnostic trouble code C1164 indicates an electrical fault in the parking brake actuator switch circuit. This code is set when the control module (such as the body control module or brake system module) detects an abnormal voltage, unexpected resistance, or signal interruption in the switch circuit. As a result, the electronic system cannot accurately determine whether the parking brake is applied or released, which may affect interdependent functions like traction control, engine start, or automatic brake release on certain models.
1. Commonly Affected Makes
2. Most Common Causes
- Faulty or damaged parking brake actuator switch
- Short circuit, open circuit, or excessive resistance in the switch wiring
- Corroded, bent, or loose pins in the electrical connector
- Mechanically defective parking brake actuator assembly
- Internal failure in the control module (BCM or brake module)
3. Symptoms You Will Notice
- Parking brake warning light illuminated on the dashboard
- Inability to release or apply the parking brake electronically
- Traction control or stability control system malfunction
- Engine may not start or start with difficulty
- Automatic brake release feature inoperative
4. Step-by-Step Diagnosis
Scan the vehicle's control modules for stored codes and freeze frame data
Visually inspect the parking brake actuator switch and its wiring for damage, corrosion, or loose connections
Test the switch circuit for proper voltage, ground, and continuity using a multimeter
Check the switch resistance and compare to manufacturer specifications
If wiring and switch are okay, test the control module for internal faults or perform a module reprogramming if applicable
5. Frequently Asked Questions
Is it safe to drive?▼
Driving with code C1164 is not recommended because the parking brake status may be unknown, potentially affecting brake system functions and safety systems. Have the vehicle inspected promptly.
How much does it cost to fix?▼
Repair costs typically range from $150 to $600, depending on whether the switch, wiring, or control module needs replacement. Diagnostic fees are usually $100-$150.