C0667 — Right Rear Wheel Speed Sensor B Range/Performance

OBD2 code C0667 flags a problem with the ABS / stability control (C0667 — right rear wheel speed sensor b range/performance: causes, symptoms & fix). Short, gentle driving to a shop is usually possible. Common culprits: blown fuse or low voltage to the ABS module, damaged tone (reluctor) ring on the hub, damaged sensor wiring or corroded connector.

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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 C0667 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 C0667 does not return.

Approximate repair cost

Repair cost depends on which component actually failed. Typical scenarios for C0667 (parts and labor, USD, independent shop rates): Replace a wheel speed sensor: $120–$350; ABS module repair or replacement: $400–$1,200; Repair sensor wiring: $80–$250. Overall, fixing C0667 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 does OBD2 code C0667 mean?

How do I diagnose C0667 myself?

Start with a scan: confirm C0667, 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.

How much does it cost to fix C0667?

Replace a wheel speed sensor — $120–$350; ABS module repair or replacement — $400–$1,200; 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.

Will C0667 clear itself?

Sometimes C0667 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.

What are the symptoms of C0667?

Drivers most often notice: brake pedal pulsation changes, speedometer or cruise control issues, stability control disabled message, ABS not operating during hard braking.

C0667 — C0667 — Right Rear Wheel Speed Sensor B Range/Performance: Causes, Symptoms & Fix

When your vehicle's control module notices something off with the right rear wheel speed sensing circuit, it logs trouble code C0667. This code specifically points to the secondary speed sensor on the right rear wheel — the "B" designation in automotive shorthand refers to a redundant or backup sensor circuit. The ABS controller relies on precise wheel speed data to modulate brake pressure during emergency stops and to feed the stability system real-time motion data. When those readings fall outside expected parameters, C0667 appears.

The ABS module constantly monitors voltage signals from each wheel speed sensor. Each sensor generates an alternating current signal as a toothed reluctor ring spins past it; the frequency of that signal translates directly into wheel RPM. C0667 triggers when the right rear secondary sensor's signal either disappears entirely, spikes erratically, or simply doesn't match what the control module calculates as reasonable based on vehicle speed and the other three sensors. The module typically requires this fault to occur across multiple drive cycles before lighting up the dashboard — a deliberate design to filter out transient electrical noise. Once stored, the module captures a freeze frame snapshot showing engine RPM, calculated load, coolant temperature, and vehicle speed the instant the fault was detected, giving you a head start on pinpointing the trigger.

The presence of C0667 doesn't necessarily mean the sensor itself is dead. Sometimes a marginal signal fluctuates just enough to confuse the module's range-check logic without fully dropping out. Other times a wiring issue or corroded connector introduces resistance that distorts the signal. The tone ring — the toothed metal ring mounted to the hub — can accumulate road debris or suffer physical damage, generating phantom pulses. Regardless of the root cause, the result is the same: the ABS and electronic stability control systems lose confidence in one wheel's speed data and switch to a limited-function fallback mode.

Symptoms of C0667

An illuminated ABS warning lamp on the instrument cluster
A stability control disabled or ESC off message appearing briefly or staying lit
Noticeable brake pedal pulsation that differs from normal ABS engagement
Inaccurate speedometer reading or cruise control refusing to engage
Extended stopping distance when braking hard on wet or slippery pavement
The traction control system failing to intervene during wheelslip events
Occasional speedometer needle fluctuation or erratic behavior

Common Causes of C0667

The wheel speed sensor itself fails most frequently — heat, moisture, and mechanical stress take a toll over time. Sensor wiring and connectors rank second, with chafed insulation, broken strands, or corrosion at the harness junction creating intermittent or high-resistance faults. A damaged reluctor ring on the right rear hub assembly can produce incorrect signal patterns even when the sensor reads fine electrically. A blown fuse supplying the ABS module disrupts power entirely, preventing proper sensor operation. In rare cases, the ABS control module itself develops internal circuitry problems that corrupt sensor data processing.

How to Diagnose C0667

Start by connecting a quality OBD2 scanner to the vehicle's data port and confirm that C0667 is currently stored. Record the freeze frame data alongside the code — this snapshot reveals engine load, vehicle speed, coolant temperature, and RPM at the moment the fault occurred, narrowing down whether the problem happens during cold starts, specific speeds, or hard braking. Next, scan for any related trouble codes; codes in the C0xxx family often share common ground paths or power supplies, and manufacturer TSB databases may contain service bulletins addressing known sensor or wiring issues for your specific platform.

Perform a thorough visual inspection of the right rear wheel speed sensor wiring harness, paying close attention to the connector body, terminals, and any points where the harness bends near the suspension. Look for cracked insulation, rubbed-through wires, green corrosion growth, or a loose fit when the connector is seated. With the vehicle safely raised and supported, remove the sensor from the hub and inspect the sensing face for metal debris, pitting, or physical damage, then examine the reluctor ring teeth for chips, missing teeth, or accumulated grime that could disrupt the magnetic field.

Reinstall the sensor and use your scan tool's live data function to monitor all four wheel speed PIDs simultaneously during a slow test drive on a flat surface. The right rear reading should track smoothly with the others; a faulty sensor typically drops to zero, spikes intermittently, or shows a value that diverges significantly from the calculated vehicle speed. Once you have isolated the suspect component, clear the code and complete a full drive cycle that replicates the conditions recorded in the freeze frame. If C0667 does not return after this validation drive, the fault was likely temporary — but monitor the code status over the following days to confirm.

Repair Options for C0667

Replacing the right rear wheel speed sensor resolves the issue in the majority of C0667 cases and typically runs $120–$350 for parts and labor at an independent shop. If inspection reveals wiring damage, repairing the harness or connector individually generally costs $80–$250 depending on the extent of the work and whether harness replacement is required versus solder-and-tape splices. When the tone ring shows visible damage or the ABS module itself tests faulty, module-level repair or full replacement runs $400–$1,200 depending on whether you opt for a remanufactured unit or new OEM replacement.

Driving Safety with C0667

Base hydraulic braking remains functional, so you can drive the vehicle cautiously to a repair facility — but ABS and electronic stability control are effectively disabled. On dry pavement this limitation is manageable, yet stopping distances increase noticeably on rain-slicked roads, packed snow, or gravel where wheel-speed modulation normally prevents lockup. Traction control also cannot intervene if a rear wheel starts slipping. Prioritize fixing C0667 promptly; the repair is typically straightforward and far less costly than the consequences of over-reliance on compromised safety systems.