C1174 — Park Brake Switch # 2 Applied Circuit Failure

C1174 — Park Brake Switch # 2 Applied Circuit Failure. A fault in the ABS / stability control. Short, gentle driving to a shop is usually possible. Typical causes: damaged sensor wiring or corroded connector, blown fuse or low voltage to the ABS module, 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 C1174 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 C1174 does not return.

Approximate repair cost

Repair cost depends on which component actually failed. Typical scenarios for C1174 (parts and labor, USD, independent shop rates): ABS module repair or replacement: $400–$1,200; Repair sensor wiring: $80–$250; Replace a wheel speed sensor: $120–$350. Overall, fixing C1174 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

How much does it cost to fix C1174?

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

How do I diagnose C1174 myself?

Start with a scan: confirm C1174, save the freeze frame and note any companion codes. Then inspect the wiring and connectors related to the park brake switch # 2 applied circuit, and verify the suspect component against live data before buying parts.

What are the symptoms of C1174?

Drivers most often notice: ABS not operating during hard braking, ABS or ESC warning light on, brake pedal pulsation changes, stability control disabled message.

What does OBD2 code C1174 mean?

Will C1174 clear itself?

Sometimes C1174 clears after a few drive cycles if the fault was intermittent — for example a loose connector or a tank of bad fuel. The underlying cause usually remains, so the code tends to return. Clear it once; if it comes back, diagnose rather than erase it repeatedly.

When your vehicle's onboard diagnostics detect a problem with the park brake switch input going into the ABS or stability control module, they log trouble code C1174. The official description for this code reads "Park Brake Switch # 2 Applied Circuit Failure." It falls within the chassis category, which means it involves the braking, steering, or suspension systems rather than the engine or transmission. In plain terms, the ABS controller is receiving a signal from the park brake circuit that it cannot interpret correctly — either the circuit is open, shorted, or returning data that falls outside the factory-calibrated range.

To make sense of why C1174 triggers, you need to understand how the system works. The ABS module constantly monitors multiple inputs — wheel speeds, brake fluid pressure, and signals from switches like the park brake — to decide when to intervene during braking. When the park brake switch circuit behaves unexpectedly, the module flags the fault. Most of the time this happens across multiple drive cycles, not on the very first glitch, which is why the code often survives a simple clear-and-forget attempt. One of the first things the module does when storing C1174 is capture a freeze frame: a snapshot of engine RPM, load, coolant temperature, and vehicle speed at the exact moment the problem was detected. That snapshot is gold when you start diagnosing, because it tells you under what conditions the fault appeared.

Common symptoms of C1174

The way C1174 shows up in everyday driving varies, but several patterns appear again and again.

The ABS warning light or electronic stability control lamp stays illuminated on the dashboard.
During hard braking, the ABS fails to activate — you may notice the wheels locking instead of pulsing.
The brake pedal can feel different, with changes in how it pulsates or resists pressure.
A message may appear stating that stability control has been disabled.
The speedometer or cruise control may behave erratically or stop working entirely.
In some cases, the vehicle may exhibit longer stopping distances than normal, especially on wet or loose surfaces.

What causes C1174?

The root causes of C1174 range from simple wiring issues to outright component failure. Most shops find the problem in one of the following areas, listed roughly from most to least common.

A wheel speed sensor has failed or is producing inconsistent readings.
The tone ring — the notched metal ring mounted on the hub that the sensor reads — is damaged or coated with debris.
The wiring harness or connector leading to the ABS module is damaged, corroded, or has a poor electrical connection.
The ABS control module itself has an internal fault and is no longer processing inputs correctly.
A blown fuse or insufficient voltage is reaching the ABS module.
The park brake switch itself is faulty or out of adjustment.

How to diagnose C1174

A systematic approach keeps you from throwing parts at the car and hoping something sticks. Follow these steps in order.

Plug in an OBD2 scanner and confirm that C1174 is stored. Save the freeze frame data before clearing anything — that snapshot tells you engine load, rpm, coolant temperature, and vehicle speed when the fault occurred, and that guides every step that follows.
Pull all related codes. C1174 rarely appears alone. P-codes for individual wheel speed sensors, for example, often point directly at the failing component. Also check for any manufacturer technical service bulletins that apply to your make, model, and model year — many C0xxx brake codes have documented factory fixes or software updates.
Inspect the wiring and connectors feeding the ABS and stability control circuits. Look for chafing, broken insulation, corrosion at the pins, and any signs that a connector is not fully seated. Wiggle the harness while monitoring live data to catch intermittent opens.
Read all four wheel speed PIDs using your scanner while driving slowly in a safe area. A faulty sensor will either drop out entirely or produce a reading that makes no sense compared to the others.
Physically examine the tone ring and sensor at each wheel. Remove any built-up metal debris, check for chipped or missing teeth on the ring, and verify that the sensor is seated correctly and shows no signs of cracking.
Clear C1174 and run a complete drive cycle — ideally replicating the conditions recorded in the freeze frame — and see whether the code returns. If it does, you are dealing with a hard failure rather than a one-time electrical glitch.

Repair options and costs for C1174

Once you have narrowed down which component is at fault, the repair path becomes clear. Labor rates shown below reflect typical independent shop pricing in USD.

Repair sensor wiring — $80 to $250. If the harness itself is damaged but the sensors and module are intact, splicing in new wire or replacing the connector is usually the most cost-effective fix.
Replace a wheel speed sensor — $120 to $350. Sensors fail more often than any other single component in this circuit, and replacement is straightforward on most vehicles.
ABS module repair or replacement — $400 to $1,200. In many cases the module can be sent out for bench repair rather than replaced outright, which brings the cost closer to the lower end. A full dealer replacement pushes toward the high end.

The total cost to fix C1174 typically falls somewhere between $80 and $1,200, depending entirely on which part has failed. The good news is that the least expensive scenario — a wiring repair — is also one of the most common root causes. Spending time on careful diagnosis before buying an expensive module is almost always the smarter move.

Can you drive with C1174?

Your ordinary foot brakes will still apply — the parking brake circuit fault does not disable the brake pedal itself. With C1174 stored, however, the ABS and electronic stability control are effectively offline. On dry pavement at low speed this may not feel dramatic, but on wet roads, gravel, or ice, stopping distances can increase noticeably and the vehicle becomes harder to control in a panic maneuver. Treat this code as a caution-level issue: you are not stranded, but you should schedule the repair promptly and drive defensively in the meantime.