C0167 – ABS Valve Relay Circuit High

You’re looking up DTC C0167 because a warning indicator, ABS/traction light, or stability lamp appeared on the dash. Per SAE J2012-DA this code flags a chassis sensor signal circuit malfunction, but the exact sensor, corner, or control module it points to can vary by make, model, and year. That means you should test, not guess: verify power and ground, measure sensor voltages and resistance, and confirm module messages on the CAN/LIN bus or Mode $06 data. This guide is test-driven so you can confirm the fault or brief a shop accurately.

What Does C0167 Mean?

According to SAE J2012-DA, C0167 is a chassis code indicating a sensor signal circuit malfunction. The J2012-DA wording categorizes it as a circuit-level fault rather than automatically naming a specific corner or module, because manufacturers sometimes map the same numeric code to different sensors or control units.

Because the exact definition can vary by make/model/year, verify the failure with basic electrical and network testing: check sensor reference voltage and ground with a DVOM, measure resistance/continuity of the harness, observe live data or Mode $06 values from the affected module, and confirm required CAN/LIN frames are present with a diagnostic tool or oscilloscope.

Quick Reference

• Code type: Chassis sensor signal circuit malfunction (per SAE J2012-DA)
• Likely area: Sensor wiring, connector, or module input (varies by vehicle)
• First checks: Power, ground, sensor voltage, continuity, and bus messages
• Typical tools: OBD-II scanner, DVOM, scope, wiring diagrams

Real-World Example / Field Notes

A technician scanned a compact SUV and saw an ABS/stability lamp with frozen C0167 in freeze frame. Mode $06 showed erratic sensor counts and the affected ECU logged intermittent signal loss. The tech started with basic electrical checks: verified 5V reference and ground at the harness, then measured sensor resistance and continuity back to the module. An oscillogram while spinning the wheel showed a noisy, interrupted waveform. The root cause was a chafed harness where it passed over the suspension arm; repairing the wiring and securing the harness cleared the code and restored normal sensor data.

Symptoms of C0167

• Warning light — ABS/Traction control lamp may illuminate on the dash.
• ABS intervention — ABS may engage incorrectly or not at all during braking.
• Stability issues — Traction control or stability assist may be reduced or disabled.
• Inconsistent sensor data — Speed or wheel speed values shown on a scan tool may jump or be implausible.
• Stored freeze frame — Freeze frame or Mode $06 data shows abnormal readings for the affected circuit.
• Intermittent operation — Fault may come and go, often after vibration or moisture exposure.

Common Causes of C0167

Most Common Causes

Because C0167 is manufacturer-dependent, the exact component named by the code can vary. In practice, the most common causes are wiring and connector faults between the wheel speed/ABS sensor and the ECU, sensor signal plausibility failures (open, short, or noisy sensor), and loss of reference power or ground to the sensor or ABS module. Always confirm the exact J2012-DA text from your scan tool first, then focus tests on power/ground, sensor output, and network integrity.

Less Common Causes

Less often the issue is a failed ABS/ESC module, a shorted CAN/LIN segment, or internal sensor electronics failing under load or temperature. Intermittent PCM/module firmware glitches or contaminated tone rings (missing or damaged teeth) can also trigger the code. These are lower probability but should be considered after basic electrical and network tests.

Diagnosis: Step-by-Step Guide

Tools: OBD‑II scan tool capable of reading manufacturer DTC text and Mode $06, digital multimeter (DMM), automotive oscilloscope or graphing scan tool, backprobe pins or wire piercers, wiring diagrams/repair manual for the vehicle, basic hand tools, contact cleaner and dielectric grease, jumper wires or a fused power lead.

1. Read the code and view the exact J2012-DA description and freeze‑frame/Mode $06 data with your scan tool to confirm what the manufacturer lists for C0167.
2. Record related codes and live data for wheel speeds, ABS status, and reference voltages before clearing.
3. Visually inspect the wiring harness and connector for the sensor/module referenced by the J2012-DA text; look for corrosion, bent pins, rodent damage, or water intrusion.
4. Backprobe the connector and verify reference voltage (typically 5V), ground continuity, and sensor output signal with a DMM while key is ON and during wheel rotation.
5. Use an oscilloscope or graphing scan tool to check the sensor waveform while rotating the wheel; look for symmetry, missing pulses, excessive noise, or amplitude loss (sensor plausibility).
6. Wiggle test harness and connectors while monitoring live data to reproduce the fault and detect intermittent opens or shorts.
7. Check CAN/LIN if the code or scan tool suggests a network fault — measure bus voltage, termination, and look for errors in the module’s communication on the scanner.
8. Inspect tone ring or reluctor for damage, missing teeth, or heavy rust that would alter the sensor waveform.
9. Swap a known-good identical sensor or module only if wiring and connector tests confirm the harness is good; avoid replacing parts blindly.
10. Clear codes, perform a road test while monitoring live data and Mode $06, and verify the fault does not return before concluding the repair.

Professional tip: Be test-driven — confirm bad wiring or sensor with voltage/oscilloscope evidence before replacing modules. Many C0167 cases are fixed by repairing chafed wires or a poor ground; replacing the ABS module first is rarely the correct fix and increases cost and complexity.

Possible Fixes & Repair Costs

Because SAE J2012-DA wording for C0167 can vary by make/model, you should confirm the exact definition with the vehicle’s service literature and by running Mode $06 or live-data tests. Test-driven fixes focus on wiring/connectors, sensor plausibility, power and ground, and CAN/LIN message presence. Start with visual connector checks, back-probe for proper reference voltage and signal voltage, measure resistance to the sensor or harness, and verify expected CAN frames with a scope or scan tool before replacing modules.

Low-cost fixes: $20–$120 — includes cleaning/repairing a corroded connector, crimp/splice repair, or replacing a short sensor pigtail. Typical repairs: $120–$450 — includes replacing a faulty wheel/steering/ABS sensor assembly or repairing a damaged harness section; labor varies by access. High-cost repairs: $450–$1,200+ — includes replacing an ABS/ESC module, control module reprogramming, or extensive harness replacement and calibration. Factors affecting cost: part availability, reprogramming/bleeding procedures, labor rates, and whether multiple modules report faults. Always verify fault plausibility with bench or in-vehicle electrical tests and confirm CAN/LIN signaling before authorizing major parts replacement.

Can I Still Drive With C0167?

You can usually drive short distances with C0167, but safety systems like ABS, traction control, or stability control may be reduced or disabled depending on the vehicle. Drive cautiously and avoid slippery or high-speed situations until the fault is diagnosed. If the code is accompanied by warning lamps or limp-home behavior, stop and have the vehicle inspected. Prioritize tests of power/ground and bus communication to assess immediate risk.

What Happens If You Ignore C0167?

Ignoring C0167 can leave anti-lock and stability features compromised, increasing crash risk in emergency maneuvers or low-traction conditions. Intermittent faults may get worse, leading to higher repair costs later if a connector corrodes or a harness breaks completely.

Last updated: March 1, 2026

Vehicles Commonly Affected by C0167

C0167 appears across many manufacturers because it’s a chassis-related DTC in SAE J2012-DA terminology; you’ll see it on passenger cars, SUVs, and trucks from Toyota, Honda, Ford, GM, and various European makes. The exact meaning and affected component can change by year and model. Confirm vehicle-specific definitions with the factory code index and verify with electrical/network testing—back-probing sensors, checking reference voltages, and monitoring CAN messages will pinpoint the fault regardless of make.