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

**Overview of the code**

The OBD2 trouble code C1163 indicates a problem with the **Park Brake Switch # 2** circuit. Specifically, it points to a **short to ground** within the circuit that supplies or interacts with this switch. In simple terms, the vehicle’s computer has detected an electrical short in the wiring or the switch itself, which could affect the parking brake system or related functions.

Please note that **label variations** can occur between different vehicle manufacturers, potentially leading to different terminology or coding labels for the same fault.

**Fast Facts:**

System affected: Parking Brake / Brake System
Severity: Moderate
Main symptoms: Parking brake warning lights, inability to release or engage brake functions, possibly diagnostic trouble indications on the dashboard
Driveability: Limited / No — depending on vehicle configuration

—

**Manufacturer variations for trouble code C1163**

Different automakers may assign similar fault conditions different labels or code numbers. For instance, a vehicle from one manufacturer might label this as **P2613** or another code, but the underlying issue remains similar — a circuit short involving the parking brake switch system.

**Known label variations include:**

Ford: C1163 — Park Brake Switch #2 Circuit Short to GND
Toyota: C1163 — Brake Switch Circuit Fault
Honda: C1163 — Parking Brake Switch Circuit Malfunction
Volkswagen: C1163 — Park Brake Switch #2 – Short to Ground
BMW: C1163 — Brake Feature Circuit Issue

—

**What does trouble code C1163 mean?**

The C1163 code signifies that the vehicle’s Electronic Control Unit (ECU — the vehicle’s computer that manages various systems) has detected an **electrical short to ground in the circuit that operates the second parking brake switch**.

The ECU continually monitors circuits associated with safety and vehicle operation systems. When it senses that this particular switch circuit has become shorted—that is, connected directly to ground in a way that bypasses normal operation—the code is triggered.

Such a fault often occurs because of **damaged wiring**, an **errant connection**, or a **faulty switch**. This situation is typically detected during initial system checks when the ignition is turned on or during driving, especially if the parking brake is engaged or the system requires the switch to function correctly.

This code usually appears along with dashboard warning lights, especially related to the parking brake or brake system, and can impact driving or parking functions if not addressed.

—

**Severity and risks of trouble code C1163**

The severity of a C1163 fault depends on the vehicle’s safety features and the system’s configuration. Since it involves the parking brake circuit, the primary risk relates to **parking safety** and **system operation**.

– If the circuit short is affecting the parking brake warning or control, you might experience issues with parking brake engagement or release.
– The vehicle might enter a **limp mode** or restrict certain functionalities to prevent unsafe operation.
– There is a potential risk of **parking brake failure**, especially if the fault is not corrected.

**Can the vehicle be driven?**
**Limited —** Depending on the severity and the system affected, the vehicle may still be driven but with caution, especially avoiding parking on slopes or in situations where parking brake reliability is critical. It’s recommended to have the issue diagnosed and repaired promptly.

—

**Symptoms of trouble code C1163**

The warning signs associated with C1163 can vary, but common symptoms include:

– **Dashboard warning lights**, such as the parking brake icon or brake system alert.
– **Inability to fully release or engage the parking brake**.
– **Unusual manual or electronic parking brake operation**.
– **Intermittent or persistent error messages related to the braking system**.
– Possible **alarms or warning lights** related to ABS or electronic parking brake functions.
– Reduced or limited vehicle driveability depending on the system’s safety protocols.

In some vehicles, the problem might be silent, with no noticeable symptoms apart from the warning lights during a diagnostic scan.

—

**Most likely causes of trouble code C1163**

While each vehicle’s specifics can vary, the most common causes are generally consistent. Here are the likely culprits, ranked from the most to least probable:

1. **Damaged or frayed wiring or connector in the parking brake switch circuit**
This is often the primary cause. Over time, wiring insulation degrades or a connector becomes loose or corroded, leading to a short circuit to ground.

2. **Faulty parking brake switch (Switch # 2)**
The switch itself may be defective or have internal damage, causing it to create a permanent short to ground.

3. **Short circuit within the wiring harness or grounding point**
A wiring harness may have been compromised due to impact, rodents, or corrosion, creating a direct short.

4. **Incorrect or damaged ECU or relay**
Although less common, an internal fault in the control module or relays may trigger false signals or internal shorts.

5. **Recent repairs or modifications impacting the circuit**
Any recent work near the parking brake wiring could inadvertently cause a short or disconnection.

—

**How to diagnose trouble code C1163**

Diagnosing a C1163 involves systematic checks to identify whether the issue stems from wiring, switches, or the control module itself. Here are the standard steps:

1. **Visual inspection**:
Check the wiring, connectors, and switch for visible damage, corrosion, or loose connections.

2. **Verify circuit continuity**:
Use a multimeter to test the wiring between the parking brake switch and the ECU for continuity, ensuring no short to ground exists.

3. **Inspect the parking brake switch**:
Test the switch for proper operation according to the vehicle manufacturer’s specifications, verifying that it opens and closes correctly.

4. **Check for broken or damaged wiring insulation**:
Look for frayed wires, pinched cables, or signs of wear that could cause a short.

5. **Use live data or scan tool**:
Using a diagnostic scan tool, observe the switch state and circuit voltage signals when manipulating the parking brake or switch.

6. **Check ground points**:
Ensure grounding points are clean, secure, and free of corrosion.

7. **Clear the code and retest**:
After repairs, erase stored codes and run the system to verify the fault does not return.

—

**Possible repairs for trouble code C1163**

The necessary repairs typically depend on the identified cause. Here are common solutions in order of priority, each tailored to the probable causes:

– **Replace or repair damaged wiring**:
A basic repair that involves fixing or replacing frayed, corroded, or broken wiring. Usually performed by technicians familiar with automotive wiring.

– **Replace the parking brake switch (#2)**:
If the switch is faulty or internally damaged, replacing it is recommended. This is often a straightforward repair but requires some mechanical work.

– **Secure or replace connectors**:
Ensure all connectors are tightly connected, free of corrosion, or replace damaged terminals or connectors.

– **Check and clean grounding points**:
Corrosion can cause grounding issues; cleaning or rewiring ground points restores proper circuit function.

– **Replace the control module (if necessary)**:
In rare cases where the ECU or related relays are faulty, reprogramming or replacing the module might be required.

– **Professional diagnostics or software updates**:
In some advanced cases, an OEM-specific diagnostic tool might be necessary for calibration or reprogramming.

—

**Vehicles commonly associated with trouble code C1163 in Europe**

The occurrence of C1163 varies depending on the vehicle’s make and model. In European vehicles, this fault is typical among cars equipped with electric parking brake systems or advanced brake control units.

**Examples include:**

– Volkswagen Group: Volkswagen Golf, Polo, Tiguan, Audi A3, A4 (models with electronic parking brakes)
– BMW: 1 Series, 3 Series with electric parking brake
– Mercedes-Benz: C-Class, E-Class (models with electronic parking brake systems)
– Peugeot: 3008, 508
– Renault: Clio, Megane (models equipped with electronic parking brake)

Note: The prevalence depends on whether the vehicle has an electronic parking brake system, which is common in newer models.

—

**Frequent mistakes & best practices**

Common errors during diagnosis or repair can magnify the problem or lead to incorrect repairs. Some frequent mistakes include:

– **Ignoring visual inspection** — jumping straight to parts replacement without inspecting wiring or connectors.

– **Failing to verify switch operation** — replacing parts without confirming whether the switch itself is faulty or wiring is at fault.

– **Using incompatible or poor-quality replacement parts** — which can lead to recurring faults or further damage.

– **Overlooking ground connections** — poor grounding is often the root cause of shorts; neglecting this can result in ineffective repairs.

– **Misinterpreting live data** — not understanding the expected switch states or signals can lead to incorrect diagnosis.

– **Forgetting to clear codes after repairs** — and assuming the issue is fixed without verifying that the code does not return.

**Best practices include:**

– Always start with a visual inspection.
– Use proper diagnostic tools and follow manufacturer-specific procedures.
– Check wiring continuity and integrity before replacing parts.
– Document findings and repairs for future reference.
– Ensure ground points are clean and secure.
– Verify repairs by clearing codes and performing a retest.

—

**FAQ — trouble code C1163**

**Can this code disappear on its own?**
It’s rare. Usually, this fault persists until the underlying issue—wire damage, switch failure, or grounding problem—is addressed. In some cases, transient issues may clear temporarily but are likely to reappear if the cause isn’t fixed.

**Can I keep driving?**
Depends on the vehicle and system configuration. Typically, limited driving may be possible, but it’s not advisable to ignore the fault. The parking brake or brake system may not operate correctly, compromising safety. Always consult a professional if uncertain.

**Why does the code return after clearing?**
The underlying cause, such as damaged wiring, faulty switch, or poor grounding, remains unresolved. Clearing the code temporarily resets the system but does not fix the fault, so it reappears once the system performs its diagnostics again.

—

This comprehensive overview aims to equip both the dedicated car owner and the professional technician with the pertinent knowledge to understand, diagnose, and repair the C1163 trouble code effectively. Proper diagnosis and timely repairs ensure safe and reliable vehicle operation.