C1164 — Park Brake Actuator Assembly Switch Circuit Failure #

Note: The description for this DTC may vary depending on the vehicle manufacturer.

• Park Brake Actuator Assembly Switch Circuit Failure (Ford, Lincoln, Mazda)
• Electric Parking Brake Switch Circuit Malfunction (Nissan, Infiniti)
• EPB Actuator Switch Circuit Fault (Hyundai, Kia)

Summary of DTC C1164 #

The C1164 diagnostic trouble code (DTC) indicates a malfunction in the circuit related to the park brake actuator assembly switch. This switch is a key component of the electric parking brake (EPB) system, responsible for detecting the position or state of the parking brake actuator. When the Powertrain Control Module (PCM) or Body Control Module (BCM) detects an abnormal voltage, resistance, or signal in this circuit, it triggers the C1164 code. The issue may affect the normal operation of your parking brake, potentially impacting both safety and vehicle compliance with regulations. Addressing this code promptly ensures that your parking brake functions as intended and helps prevent further electrical or mechanical problems.

Common Symptoms for DTC C1164 #

A vehicle with code C1164 may present clear warning signs or be subtle, depending on the extent of the issue. The most notable symptoms typically relate to the parking brake system and its electronic controls. Drivers may notice abnormal indicator lights or experience difficulty engaging or releasing the parking brake. If left unattended, these symptoms could lead to compromised parking brake performance.

• Parking brake warning light illuminated on the dashboard
• Parking brake cannot be applied or released electronically
• Flashing or persistent EPB (Electric Parking Brake) icon
• Audible alerts or chimes related to the parking brake
• “Check brake system” or similar messages displayed
• Reduced or no response from the parking brake switch

Most Probable Causes for C1164 #

Multiple factors can trigger the C1164 code, most linked to the switch circuit’s integrity or related components. Some causes are more common than others, usually following a pattern of electrical wear or minor mechanical failures. OEMs often report the following sources, in order of frequency:

1. Faulty park brake actuator assembly switch (internal failure or wear)
2. Damaged, corroded, or loose wiring/connectors in the actuator switch circuit
3. Open or short circuit within the actuator switch wiring
4. Malfunctioning park brake actuator motor (interfering with switch signal)
5. Faulty or out-of-spec Body Control Module (BCM) or Electronic Parking Brake Module
6. Water ingress or debris in the actuator assembly or harness
7. Recent repairs or component replacements not properly reconnected

Step-by-Step Diagnosis for C1164 #

A structured diagnostic approach is essential for accurately identifying and resolving the root cause of C1164. Many steps require basic electrical knowledge and trusted test equipment. Always refer to your OEM’s service manual for vehicle-specific details.

1. Verify the code using a professional-grade scan tool. Record all related codes.
2. Visually inspect the parking brake actuator assembly and its wiring for signs of corrosion, damage, or loose connections.
3. Check the actuator switch connector for bent pins, moisture, or contamination.
4. Test the actuator switch circuit for proper continuity, voltage, and resistance using a multimeter.
5. If available, use the scan tool’s live data to monitor the actuator switch signal while operating the parking brake.
6. Manually operate the parking brake and observe for any abnormal switch readings or lack of response.
7. If wiring and switch check out, test the actuator motor and related control modules per OEM procedures.
8. Clear the code, cycle the ignition, and retest the system to confirm resolution.

Possible Repairs for C1164 #

Repairs for C1164 target the underlying cause determined during diagnosis. Always use OEM or equivalent-quality parts and follow safe repair practices. Completing repairs in the correct order can prevent unnecessary part replacement and ensure long-term reliability.

• Replace the faulty park brake actuator assembly switch
• Repair or replace damaged, corroded, or loose wiring/connectors in the actuator switch circuit
• Correct open or short circuits detected in the wiring
• Replace a malfunctioning park brake actuator motor, if necessary
• Replace or reprogram the BCM or EPB module if determined to be faulty
• Clean and protect connector terminals to prevent future water ingress or debris accumulation
• Ensure all connectors are properly seated after any repair or replacement

Is It Safe to Drive with C1164? #

Driving with DTC C1164 is not recommended in most situations. Since this code directly impacts the integrity and function of your electric parking brake, it can compromise your vehicle’s ability to remain securely stationary when parked. While your main service brakes may still function, the loss or unreliability of the parking brake system is a safety concern—especially on inclines or in emergencies. Address the issue as soon as possible to ensure your vehicle meets safety standards and to avoid unexpected rollaway incidents.

Vehicles Most Commonly Affected by C1164 #

While C1164 can appear on a variety of vehicles equipped with electric parking brake systems, it is most frequently reported on certain platforms and brands. If you own one of the following vehicles, be particularly attentive to this code:

• Ford Explorer, Edge, and F-150 (2015–present)
• Lincoln MKX, Nautilus, Aviator (2016–present)
• Mazda CX-5, CX-9, Mazda6 (2017–present)
• Nissan Rogue, Murano, Pathfinder (2017–present)
• Hyundai Santa Fe, Tucson (2018–present)
• Kia Sorento, Sportage (2018–present)

Frequent Mistakes & Best Practices for C1164 #

Misdiagnosis or incomplete repairs for C1164 can lead to recurring problems and possible safety issues. Avoid these common pitfalls by following best practices at every step.

• Replacing the actuator switch without inspecting the wiring and connectors
• Overlooking signs of water ingress or corrosion in the actuator assembly
• Ignoring related DTCs that may indicate a deeper module or system fault
• Clearing the code without confirming the root cause and verifying proper system operation
• Neglecting to perform a full system calibration or relearn after repairs

Quick FAQ for DTC C1164 #

Q: Can I temporarily bypass the parking brake actuator switch to clear the code?
A: No, bypassing the switch is unsafe and can cause further module damage or loss of critical safety functions. Always repair the fault as recommended by the OEM.

Q: Will replacing the park brake actuator assembly always fix C1164?
A: Not always. The code can also be caused by wiring faults, module issues, or connector problems. Proper diagnosis is crucial to avoid unnecessary part replacement.

If you have specific concerns about your vehicle or need further guidance, always consult a qualified automotive technician or your OEM’s service resources.