C1163 — Park Brake Switch #2 Applied Circuit Short to Gnd #

Note: The description of DTC C1163 may differ depending on the vehicle manufacturer (OEM). Always refer to your specific vehicle’s service manual for the exact wording and diagnostic pathways.

• Ford: Park Brake Switch #2 Applied Circuit Short to Ground
• Nissan: Parking Brake Switch Circuit Shorted to Ground
• Hyundai/Kia: Parking Brake Switch Circuit Low
• Mercedes-Benz: Electric Parking Brake Switch #2 Circuit – Short to Ground

Summary of DTC C1163 #

DTC C1163 points to an electrical fault within the secondary parking brake switch circuit, specifically a short to ground. In simple terms, this means that the part of the system monitoring whether your parking brake is engaged or released has detected an abnormal path for electricity—most often, a direct connection to the vehicle chassis (ground) where there shouldn’t be one. The parking brake switch is a sensor-like component that tells your car’s computers if the emergency brake is applied or not. When this circuit malfunctions, it can compromise crucial features like brake warning lights, hill start assist, or even some stability control functions. Ignoring this code could lead to misleading dashboard warnings or, in rare cases, impaired braking safety features.

Common Symptoms for Code C1163 #

When C1163 is present, your vehicle may display a range of warning signs. Some symptoms are direct, while others might seem unrelated at first glance. Here’s what drivers and technicians typically observe:

• Illuminated parking brake or brake system warning light on the dashboard
• Traction control or stability control warning lights
• Parking brake indicator remains on even when the brake is fully released
• Chiming or audible warnings related to the parking brake system
• Loss of hill start assist or related features
• In rare cases, the vehicle may remain in “limp mode” or restrict advanced driver assistance systems (ADAS)

Most Probable Causes for Code C1163 #

C1163 is typically set when the control module (usually the ABS or brake control unit) detects a short to ground in the wiring or components related to the secondary parking brake switch. The root causes, listed from most to least frequent, include:

1. Damaged or chafed wiring between the parking brake switch and the control module
2. Faulty parking brake switch (internal short or stuck contacts)
3. Corroded, loose, or contaminated connectors at the switch or module
4. Improper repairs or aftermarket alarm/remote start installations interfering with the brake switch circuit
5. Fault within the control module (rare)

Step-by-Step Diagnostic for Code C1163 #

Diagnosing a C1163 code requires a logical, methodical approach and some basic electrical knowledge. Always ensure the vehicle is secured and the parking brake is operational before beginning. Here’s a recommended diagnostic sequence:

• 1. Read the code with a scan tool, note any related codes (especially ABS or brake system DTCs).
• 2. Visually inspect the parking brake switch and its wiring for signs of damage, chafing, or corrosion.
• 3. Check the connectors at both the switch and the control module. Look for bent pins, moisture, or green/white corrosion.
• 4. Test the switch using a multimeter: with the parking brake applied and released, check for continuity and verify no direct path to ground when the switch is “open.”
• 5. Inspect the harness from switch to module for any pinch points, exposed wires, or previous repair attempts (especially near the footwell, under carpets, or at the firewall pass-through).
• 6. If all wiring and switch tests pass, consider checking the control module’s input with an oscilloscope or consult a qualified technician—module faults are rare but possible.

Possible Repairs for Code C1163 #

Once the root cause of C1163 is identified, repairs should be tailored to address what was found during diagnostics. Here are the most effective solutions:

• Repair or replace damaged or shorted wiring in the parking brake switch circuit
• Replace a faulty or internally shorted parking brake switch (OEM recommended)
• Clean or properly reconnect corroded or loose connectors
• Undo and properly route any aftermarket wiring interfering with the brake circuit
• In rare cases, replace or reprogram the brake or ABS control module after confirming all other components are sound

Is It Safe to Drive with Code C1163? #

Limited — Caution is Advised: While C1163 does not typically indicate an immediate risk of brake failure, it can lead to misleading dashboard warnings or disable certain safety features like hill start assist and traction control. If the parking brake warning light remains on, it may mask other, more urgent brake issues. For this reason, it’s best to have the fault diagnosed and repaired promptly—especially before undertaking long trips or driving in hilly areas. If you notice any actual changes in brake performance, stop driving and have the vehicle inspected immediately.

Vehicles Most Commonly Affected by Code C1163 #

Based on service data and OEM documentation, C1163 is most frequently reported on vehicles equipped with electronically monitored parking brake systems, especially from the following makes:

• Ford (Focus, Fusion, Escape, Explorer, F-Series)
• Nissan (Altima, Rogue, Pathfinder)
• Hyundai/Kia (Sonata, Santa Fe, Optima, Sorento)
• Mercedes-Benz (C-Class, E-Class, ML/GLE SUVs)
• Some Mazda, Honda, and Subaru models with advanced brake monitoring

Common Mistakes & Best Practices for Code C1163 #

Many technicians and DIYers fall into common traps when tackling C1163. Understanding these can save time, money, and headaches:

• Assuming the switch is always at fault—don’t replace it before checking for wiring issues
• Overlooking hidden harness damage under carpets or near body panels
• Neglecting to check for aftermarket accessories (alarms, remote starters) that may tap into brake circuits
• Skipping the basics: always verify good ground connections and proper battery voltage
• Forgetting to clear codes and retest after repairs to confirm the fix

Express FAQ — C1163 Parking Brake Switch Circuit #

Q: Can a short to ground in the parking brake switch circuit cause ABS or traction control lights?
A: Yes. Many modern vehicles use the parking brake switch status for ABS, traction, and stability control logic. A fault can disable these features or trigger warning lights.

Q: Do I need to replace the parking brake switch, or can I just repair the wiring?
A: Only replace the switch if it tests faulty. Most C1163 cases are caused by damaged wiring or poor connections rather than the switch itself.