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

C1163 — Park Brake Switch # 2 Applied Circuit Short to Gnd. A fault in the ABS / stability control. Short, gentle driving to a shop is usually possible. Typical causes: blown fuse or low voltage to the ABS module, faulty ABS module or pump motor, damaged tone (reluctor) ring on the hub.

chassis (brakes/steering/suspension)

Is it safe to drive?

Drive with caution The base brakes usually still work, so careful driving is possible — but ABS and stability control are disabled, which lengthens stopping distances on slippery roads. Fix promptly and avoid harsh driving.

How to diagnose with an OBD scanner

Read the code and freeze frame Connect an OBD2 scanner, confirm C1163 is stored, and save the freeze frame data — it shows engine conditions when the fault was detected.
Check for companion codes and TSBs Related codes often reveal the real root cause. Also check manufacturer technical service bulletins (TSB) for your make and model — many C0xxx issues have factory fixes or software updates. Search by VIN on the manufacturer site or nhtsa.gov.
Inspect wiring and connectors Visually inspect the wiring harness and connectors related to the ABS / stability control for damage, corrosion, chafing or poor contact.
Subsystem check Read all four wheel speed PIDs while driving slowly — the faulty sensor drops out or reads implausibly.
Subsystem check Inspect the sensor and tone ring for metal debris and damage near the hub.
Verify the repair Clear the code, complete a full drive cycle including the conditions from the freeze frame, and confirm C1163 does not return.

Approximate repair cost

Repair cost depends on which component actually failed. Typical scenarios for C1163 (parts and labor, USD, independent shop rates): Repair sensor wiring: $80–$250; Replace a wheel speed sensor: $120–$350; ABS module repair or replacement: $400–$1,200. Overall, fixing C1163 usually costs between $80 and $1,200. An accurate diagnosis before buying parts saves money — the most expensive scenario is rarely the first one to check.

Common questions

What are the symptoms of C1163?

Drivers most often notice: ABS or ESC warning light on, speedometer or cruise control issues, brake pedal pulsation changes, stability control disabled message.

How much does it cost to fix C1163?

Repair sensor wiring — $80–$250; Replace a wheel speed sensor — $120–$350; ABS module repair or replacement — $400–$1,200. Exact cost depends on the root cause, your vehicle and local labor rates — a proper diagnosis is the cheapest first step.

What does OBD2 code C1163 mean?

What is the most common cause of C1163?

The most common causes are: blown fuse or low voltage to the ABS module, faulty ABS module or pump motor, damaged tone (reluctor) ring on the hub.

How do I diagnose C1163 myself?

Start with a scan: confirm C1163, save the freeze frame and note any companion codes. Then inspect the wiring and connectors related to the ABS / stability control, and verify the suspect component against live data before buying parts.

When your vehicle's control modules run their internal checks, they monitor the health of safety-critical systems like the anti-lock brakes and electronic stability control. C1163 pops up when the system detects that the park brake switch circuit is showing abnormal behavior — specifically, a short to ground condition on the secondary applied circuit. This is a chassis-related fault code, meaning it falls under the brake, steering, or suspension family of diagnostics.

The module doesn't just flag C1163 on a single bad reading. It compares live sensor data against factory-calibrated thresholds across multiple drive cycles before committing the code to memory. When it does store the fault, it also captures a freeze frame — a snapshot of engine RPM, load, coolant temperature, and vehicle speed at the exact moment the problem occurred. That snapshot is gold when you're trying to recreate the failure condition during diagnosis.

What makes C1163 tricky is that it's often a downstream symptom of another problem. The park brake switch circuit talks to the ABS module, so issues with wheel speed sensors, wiring corrosion, or low system voltage can all trigger this code. Understanding that connection keeps you from replacing parts that aren't actually faulty.

Common symptoms of C1163

ABS warning lamp stays illuminated on the dashboard
Speedometer behaves erratically or cruise control refuses to engage
Brake pedal feel changes — either too soft or with unexpected pulsation
Stability control system displays a disabled warning message
Anti-lock function fails to activate during emergency braking maneuvers
Traction control lamp may also be on alongside the ABS light

What causes C1163?

Corroded or damaged wiring harness feeding the park brake switch circuit
Failed wheel speed sensor sending bad data to the ABS module
Worn or contaminated tone ring (reluctor) on the wheel hub assembly
Blown fuse or insufficient voltage reaching the ABS control unit
Faulty park brake switch itself — internal short to ground
Moisture intrusion at the ABS module connector causing signal crossover
Failed ABS hydraulic pump motor drawing excessive current

How to diagnose C1163

Plug in a quality OBD2 scanner, retrieve C1163, and record all freeze frame data before clearing anything. This data tells you what the engine was doing when the module first spotted the fault.
Check for any related diagnostic trouble codes. P-codes and C-codes often appear in groups — if you find a wheel speed sensor code, solve that first. Also search for TSBs (technical service bulletins) specific to your vehicle's make, model, and model year on the manufacturer portal or NHTSA website.
physically inspect the wiring running to the park brake switch and ABS module. Look for cracked insulation, green corrosion buildup, loose pins in the connector, or wires that have rubbed through against suspension components.
Monitor live wheel speed data from all four corners while driving slowly in a safe area. A failing sensor will drop out intermittently or report speeds that don't match the others.
Remove the affected wheel speed sensor and check the tone ring for metal debris, chipping teeth, or rust buildup that could disrupt the signal.
Clear the code, complete a thorough drive cycle that replicates the freeze frame conditions (same speed, load, and temperature), then rescan to verify whether C1163 returns.

Repair options and costs

The right fix depends entirely on what the diagnostic points to. Here are the common repair paths and what they typically cost at an independent shop:

Sensor wiring repair or connector replacement: $80–$250
Individual wheel speed sensor replacement: $120–$350
ABS module diagnosis, repair, or full replacement: $400–$1,200

Labor rates vary by region, and some modules can be sent out for bench repair rather than replaced outright, which brings the high end down considerably.

How much does it cost to fix C1163?

The total bill for addressing C1163 lands somewhere between $80 and $1,200 depending on which component is actually at fault. In most straightforward cases, you're looking at wiring or sensor replacement — the less expensive end of the range. The ABS module itself is the priciest component, and shops usually confirm it's bad before recommending replacement. Getting a proper diagnosis before purchasing parts almost always saves money, because the most dramatic repair scenario is rarely the first one to investigate.

Can you drive with C1163?

Your base hydraulic brakes will continue functioning even with C1163 stored, so you're not completely stranded. However, the anti-lock and stability control systems are effectively offline. On wet pavement, ice, or gravel, that means noticeably longer stopping distances and no electronic correction if a wheel starts to skid. Driving safely is still possible in the short term, but this code demands prompt attention — don't treat it as a "check engine later" situation. Get it diagnosed and repaired before you encounter marginal road conditions.