C1107 — ABS Function Enabled Input Circuit Failure

C1107 — ABS Function Enabled Input Circuit Failure. A fault in the ABS / stability control. Short, gentle driving to a shop is usually possible. Typical causes: damaged tone (reluctor) ring on the hub, damaged sensor wiring or corroded connector, failed wheel speed sensor.

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 C1107 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 C1107 does not return.

Approximate repair cost

Repair cost depends on which component actually failed. Typical scenarios for C1107 (parts and labor, USD, independent shop rates): ABS module repair or replacement: $400–$1,200; Replace a wheel speed sensor: $120–$350; Repair sensor wiring: $80–$250. Overall, fixing C1107 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

Will C1107 clear itself?

Sometimes C1107 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.

How much does it cost to fix C1107?

ABS module repair or replacement — $400–$1,200; Replace a wheel speed sensor — $120–$350; Repair sensor wiring — $80–$250. 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 C1107 myself?

Start with a scan: confirm C1107, save the freeze frame and note any companion codes. Then inspect the wiring and connectors related to the ABS function enabled input circuit, and verify the suspect component against live data before buying parts.

What are the symptoms of C1107?

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

Is it safe to drive with C1107?

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.

When your vehicle's control unit stores code C1107, it's telling you there's a problem with the anti-lock braking system or its stability control functions. Specifically, this code points to an ABS function enabled input circuit failure — meaning the electronic brain detected a fault in the signal path that activates or monitors ABS operation. C1107 falls within the chassis category of diagnostic trouble codes, which covers brakes, steering, and suspension components rather than engine or transmission systems.

The module doesn't set C1107 after a single suspicious reading. Instead, it requires the fault condition to repeat under specific operating circumstances before triggering the warning light and logging the code. When this happens, the system saves freeze frame data — a snapshot of engine load, RPM, coolant temperature, and vehicle speed at the moment the problem occurred. That snapshot becomes your roadmap for reproducing the failure during testing.

Symptoms

The brake pedal may feel different during normal stops, with noticeable changes in pulsation behavior
Your dashboard displays a message that stability control has been disabled
The ABS or electronic stability control (ESC) warning light illuminates
Speedometer readings become erratic, or cruise control refuses to engage
The anti-lock function fails to activate during emergency braking maneuvers

Causes

Damage to the tone ring (also called a reluctor ring) mounted on the wheel hub
Worn or corroded sensor wiring, including damaged connector pins at the ABS harness
Internal failure of the ABS control module or its hydraulic pump motor
Complete failure of one or more wheel speed sensors
A blown fuse or insufficient voltage supply reaching the ABS module

How to Diagnose C1107

Plug in an OBD2 scanner, verify that C1107 is stored in the system, and record the freeze frame data — this information reveals the exact driving conditions when the fault first appeared.
Scan for any related trouble codes. Additional P-codes or C-codes often point directly to the failing component. Check for technical service bulletins (TSBs) specific to your make and model — manufacturers frequently publish known issues and software updates for these codes.
Perform a thorough visual inspection of the wiring harness and electrical connectors feeding the ABS and stability control system. Look for chafed insulation, bent pins, moisture intrusion, or corrosion buildup.
Monitor all four wheel speed sensor readings through the scanner while driving slowly in a safe location. A defective sensor will produce implausible values or drop out entirely.
Remove and inspect each wheel speed sensor and its corresponding tone ring. Metal debris, cracks, or missing teeth on the ring will trigger C1107.
Clear the code, then complete a drive cycle that replicates the conditions captured in the freeze frame data. If C1107 returns, the fault is confirmed and present.

Repair Options and Costs

The repair approach depends entirely on which component caused C1107:

ABS module repair or replacement: $400–$1,200 (often requires specialist service or remanufactured units)
Wheel speed sensor replacement: $120–$350 (individual sensor cost plus labor)
Sensor wiring harness repair: $80–$250 (connector replacement or wire splicing)

Labor rates vary by region and shop, but these ranges reflect typical charges at independent repair facilities in the United States.

Total Cost to Fix C1107

Expect to spend anywhere from $80 to $1,200 depending on the root cause. The wiring harness is the least expensive scenario to address, while full ABS module replacement represents the high end. A proper diagnosis before purchasing parts prevents waste — in most cases, the expensive repair isn't the actual problem.

Can You Drive With C1107?

Your conventional brakes remain functional, so driving cautiously is technically possible. However, both anti-lock braking and electronic stability control are disabled when C1107 is active. Stopping distances increase significantly on wet, icy, or loose surfaces. Have this code investigated promptly, and avoid aggressive driving until the issue is resolved.