C1164 — Park Brake Actuator Assembly Switch Circuit Failure #

Note: The description for DTC C1164 may differ depending on the vehicle manufacturer (OEM). Always confirm with OEM documentation.

• “Park Brake Actuator Switch Circuit Malfunction” (Ford, Lincoln)
• “Electric Parking Brake Switch Circuit Failure” (Nissan)
• “Parking Brake Actuator Switch Circuit Error” (Mazda)

Summary of DTC C1164 #

The C1164 code indicates a detected issue in the park brake actuator assembly switch circuit. In simple terms, this means the system responsible for electronically applying or releasing the parking brake has a fault in the electrical switch or its wiring. The affected circuit typically sends signals between the electronic parking brake (EPB) actuator and the vehicle’s control module. Modern vehicles rely on this electronic system for both convenience and safety, so a failure here can impact the parking brake’s reliability. While this issue is not usually an immediate safety threat when driving, it should not be ignored, especially on vehicles equipped with fully electronic handbrake systems.

Common Symptoms for Code C1164 #

When C1164 is present, you may notice various symptoms, some obvious and others more subtle. Often, the most immediate sign is a warning light or message on the dashboard. Depending on the severity and system design, other features related to the park brake may also be affected. The most common symptoms include:

• Parking brake warning light illuminated on the dashboard
• Electronic parking brake (EPB) not engaging or releasing
• “Check Park Brake System” message on the display
• Audible alerts or chimes when attempting to use the parking brake
• Parking brake switch feels unresponsive or “dead”
• Intermittent operation of the electric parking brake

Likely Causes for Code C1164 #

The C1164 code is most often triggered by faults in the electrical circuit controlling the park brake actuator assembly. This can result from something as simple as a loose connector or as complex as an internal failure in the actuator itself. Based on frequency, causes can include:

1. Faulty park brake actuator switch (mechanical or electronic failure inside the switch assembly)
2. Damaged wiring or corroded connectors in the switch circuit
3. Failed electronic parking brake actuator assembly
4. Blown fuse or relay related to the parking brake system
5. Faulty park brake control module
6. Software or calibration issues (rare, but possible after module replacement or updates)

Step-by-Step Diagnostic for Code C1164 #

Diagnosing C1164 requires a logical, methodical approach, starting from the most accessible components and moving deeper if necessary. Here is a recommended diagnostic path:

• 1. Confirm the code with a scan tool and note any related codes.
• 2. Visually inspect the parking brake actuator switch and its wiring for damage, corrosion, or loose connections.
• 3. Test the switch operation with a multimeter to check for continuity and proper function when pressed/released.
• 4. Inspect the connectors at the actuator assembly and control module for signs of water ingress or corrosion.
• 5. Check related fuses and relays in the parking brake circuit.
• 6. If equipped, use the scan tool to command the parking brake on/off and monitor actuator response.
• 7. If no issues are found, consult OEM wiring diagrams and perform circuit tests for shorts, opens, or high resistance.
• 8. As a last resort, consider internal faults in the actuator assembly or control module and follow OEM testing procedures.

Possible Repairs for Code C1164 #

The correct repair depends on the diagnostic results. Addressing the root cause is key to restoring full parking brake function and clearing the code. Typical repairs may include:

• Replacing a faulty park brake actuator switch
• Repairing or replacing damaged wiring or connectors
• Replacing the electronic parking brake actuator assembly if internal failure is confirmed
• Replacing a blown fuse or faulty relay
• Repairing or replacing the parking brake control module (rare)
• Updating or reprogramming module software if recommended by the OEM

Is It Safe to Drive With Code C1164? #

Limited: You can often drive short distances with C1164 present, but caution is advised. If the electronic parking brake cannot be applied or released, parking on slopes or leaving the vehicle unattended could be risky. Use wheel chocks if parking on an incline, and seek repair as soon as possible to avoid unexpected rollaway or parking brake failure.

Vehicles Most Often Affected by C1164 #

While C1164 can appear on any vehicle with an electronic parking brake, it’s most commonly observed in certain models that use a similar actuator design or control strategy. These include:

• Ford Fusion, Edge, and Explorer
• Lincoln MKZ and MKX
• Nissan Altima, Maxima, and Rogue
• Mazda 6 and CX-5
• Other late-model vehicles equipped with electronic parking brake systems

Common Mistakes & Best Practices for Code C1164 #

Misdiagnosis is common if one rushes to replace components without thorough testing. Always start with the basics and follow a logical order, as outlined above. Some common mistakes and best practices:

• Assuming the actuator assembly is faulty without inspecting wiring and switch first
• Overlooking corroded connectors, especially in humid or wet climates
• Not checking for technical service bulletins (TSBs) related to the code
• Relying solely on the scan tool without using a multimeter
• Best practice: Always confirm repairs by clearing the code and checking system operation before returning the vehicle to service

Quick FAQ for Code C1164 #

Still have questions? Here are a few quick answers to common concerns:

• Q: Can I reset the code with a scan tool and ignore it?
  A: You can clear the code, but unless the underlying issue is fixed, it will return. Always address the root cause.
• Q: Will C1164 affect my vehicle’s main brakes?
  A: No, this code only impacts the electronic parking brake system. Your service brakes (used for stopping) are unaffected, but parking safety could be compromised.
• Q: Is this an expensive fix?
  A: Costs vary. Simple wiring repairs are inexpensive, but actuator or control module replacement can be costly. Accurate diagnosis can prevent unnecessary parts replacement.