C0117 – Chassis Steering Angle Sensor Circuit

Diagnostic Trouble Code C0117 is a chassis-class DTC that flags an abnormal steering-angle or steering-position signal at the system level. Under SAE convention it points to a circuit, plausibility, or communication issue affecting steering-input data used by stability and brake control systems, not a guaranteed failed component. Exact component responsibility — sensor, wiring, module, or network segment — varies by make, model, and year. Approach this with basic electrical and network testing at the Electronic Control Unit (ECU) level to confirm whether the fault is wiring/connectors, power/ground, sensor plausibility, or a network message issue.

What Does C0117 Mean?

At the SAE J2012 format level, the C0xxx family indicates a chassis system fault; C0117 specifically refers to an abnormal steering-angle/position circuit or signal condition reported to a chassis control module. This guide follows SAE J2012 formatting and notes that standardized DTC descriptions are published in the SAE J2012DA digital annex.

C0117 is shown here without a hyphen Failure Type Byte (FTB). An FTB, when present (for example C0117-1A), refines the fault into a subtype such as open/short/intermittent or a specific plausibility failure. Because manufacturers map chassis codes differently, confirm the exact definition and affected component for your vehicle with wiring diagrams and basic electrical and Controller Area Network (CAN) or LIN checks.

Quick Reference

• System: Steering angle/position signal or circuit used by stability/ABS systems
• Common symptoms: steering warning lamp, stability control disabled, ABS/ESC interventions
• Primary focus: wiring/connectors, power & ground, sensor plausibility, and CAN/LIN messages
• Recommended tests: scan for freeze-frame/Mode $06, measure sensor voltage/signal, check continuity and reference supply
• Repair approach: test-driven — confirm fault with measurements before replacing parts

Real-World Example / Field Notes

Example 1 — Intermittent steering warning after curb impact: A vehicle arrived with a steering-related warning light and intermittent stability faults after low-speed curb contact. The module reported C0117 as a stored chassis code. Field note: one possible cause commonly associated with this symptom is a loose or corroded connector at the steering-angle sensor. Techs confirmed normal sensor voltages with the wheel straight but intermittent signal drop while wiggling the harness at the column connector, which isolated a wiring/connector issue rather than the sensor itself.

Example 2 — Aftermarket steering-column work: A car that had recent steering-column surgery returned with C0117. One possible cause commonly associated with this pattern is misrouted or pinched wiring that altered the sensor reference or signal path. Workshop action: inspect the column harness, verify continuity to the module with the steering moved through its range, and measure the reference voltage. If reference voltage is missing while the module is powered, the fault points to power/ground or connector pin damage.

Example 3 — No obvious wiring damage, module reports implausible angle: A vehicle shows a steady out-of-range steering-position value on a scan tool while the wheels are straight. One possible cause commonly associated with this failure is a failed sensor that sends an implausible angle value to the ECU. Before replacing the sensor, confirm by comparing the sensor signal to a trusted steering-angle reference (or secondary sensor if available), check the sensor reference voltage and ground, and verify that the Controller Area Network (CAN) message carrying the angle is valid and not corrupted.

DISPLAY_LABEL: Chassis Circuit Fault – Speed Signal

Symptoms of C0117

• Warning Light — ABS or stability system lamp illuminates or stays on
• Intermittent Modulation — Unexpected ABS/ESC modulation under braking or on low-friction surfaces
• Traction Intervention — Traction control or stability intervention occurs unexpectedly or is disabled
• Speedometer Irregularity — Erratic or jumping vehicle speed readout or inconsistent cruise control behavior
• Fault Memory — C0117 stored in the chassis control module memory after a scan
• Poor Brake Feel — Pulsation or unusual pedal feedback when ABS activates

Common Causes of C0117

Most Common Causes

• Open, shorted, or high-resistance wiring or connector related to wheel speed/speed signal circuits commonly associated with chassis control modules
• Poor or intermittent power/ground to the speed-sensing circuit or the chassis control module
• Contaminated or damaged speed sensor tone ring or reluctor that produces implausible signals
• Controller Area Network (CAN) wiring or bus errors causing corrupted speed data between wheel sensors and the chassis control module

Less Common Causes

• Internal module fault in a chassis control module (ABS/ESC/traction control) — varies by make/model and requires bench or substitute-module verification
• Interference from aftermarket electronics or poor shielding causing signal degradation
• Mechanical wheel bearing damage that changes sensor air gap intermittently

Diagnosis: Step-by-Step Guide

Tools: digital multimeter, oscilloscope (preferred), bi-directional scan tool with live data and module data, wiring diagrams, back-probing pins or breakout leads, contact cleaner, basic hand tools, insulated jumper wires, and a battery/voltage drop tester.

1. Verify the concern: confirm the customer symptom and note which warning lamps are on. Record freeze-frame and DTC confirmation status with a scan tool.
2. Collect data: with your scan tool, monitor wheel speed inputs and chassis module status. Save live data and any Mode 06 or manufacturer-specific sensor plausibility values.
3. Evaluate likely causes: compare suspect sensor signals for plausibility against vehicle speed. Look for a stationary sensor reporting motion or vice versa.
4. Inspect wiring/connectors: visually check harnesses, connectors, and tone rings for damage, corrosion, or movement. Wiggle test while watching live data to find intermittent faults.
5. Power and ground checks: measure module supply voltage and ground reference under key-on and crank conditions. Voltage drop or high resistance here often mimics sensor faults.
6. Signal verification: use a multimeter to check AC or frequency output at the sensor while rotating the hub; confirm expected waveform with an oscilloscope for amplitude and waveform shape.
7. Bus and network checks: verify Controller Area Network (CAN) bus integrity — measure CAN high/low idle voltages and look for error frames or lost messages on the scan tool. If multiple modules report inconsistent speed, suspect network issues.
8. Confirm the fault: a repeatable bad waveform, open/short on the wiring, or a verified power/ground issue confirms the repair target. If module failure is suspected, confirm by swapping with a known-good module only after verifying wiring and signals.
9. Rectify only the confirmed fault: repair wiring, replace the sensor, or service connectors based on the failing test. After repair, clear codes and perform a targeted road test while monitoring live data.

Professional tip: avoid replacing sensors or modules without first proving the root cause with waveform or continuity tests. Most C0117 cases are wiring, connector, or tone-ring related — start with low-cost, verifiable electrical checks and use an oscilloscope to document the fault before parts replacement.

DISPLAY_LABEL: Chassis Circuit Fault — Wheel Speed Signal

Possible Fixes & Repair Costs

Do not replace parts without confirming the fault with tests. Typical fixes for a C0117 condition focus on wiring/connectors, sensor plausibility, and module power/ground or network integrity. Low-cost repairs often involve cleaning or repairing a corroded connector or pin and re-seating harness clamps; only justify this after continuity and resistance checks show intermittent or high resistance. Mid-range repairs usually replace a damaged harness section or sensor after bench and in-situ signal tests confirm an open/short or implausible waveform. High-end repairs include module replacement and programming when bench and network tests show a failed control module or unresolved bus errors after wiring and sensor checks.

Cost ranges (approximate, parts & labor): Low: $40–$150 for connector repair or cleaning. Typical: $150–$450 for sensor replacement or wiring repair. High: $450–$1,200+ for control module replacement and programming. Factors affecting cost: diagnostic time, accessibility, vehicle make/model programming fees, and whether additional modules or alignment steps are required. Each repair recommendation must point back to a confirming test: continuity/voltage proof for wiring, oscilloscope waveform or sensor resistance for sensor, and bus traffic/voltage tests for module replacement.

Can I Still Drive With C0117?

You can often drive short distances with a C0117 code, but risk depends on what the code is indicating on your vehicle. If the code correlates to a wheel speed signal intermittency, traction control and stability features may be degraded or disabled; braking performance can be unaffected for standard braking but electronic aids will be compromised. Do a quick scan for active warnings, test the sensor signal at road speed if possible, and avoid high-speed driving or slippery conditions until the fault is diagnosed and cleared.

What Happens If You Ignore C0117?

Ignoring C0117 can leave stability and traction control systems degraded or disabled, increasing crash risk in low-traction situations. Intermittent faults may progress to permanent failure, potentially causing additional modules to set related network errors. Address the issue after confirming with electrical and network tests to avoid cascading faults and higher repair costs.

Last updated: March 1, 2026

Key Takeaways

C0117 is a chassis-level diagnostic code associated with wheel speed signal circuits; standardized DTC structure follows SAE J2012 and full descriptions are in the SAE J2012DA digital annex. The exact component or location varies by make/model/year, so you must confirm with electrical and network testing. Follow a test-driven diagnostic flow: verify symptom, collect scan data, evaluate likely causes with wiring diagrams, test to confirm, repair the confirmed fault, and verify the fix. Prioritize wiring/connectors, sensor plausibility, power/ground, and vehicle network checks.

Vehicles Commonly Affected by C0117

This code is commonly seen on a wide range of passenger cars, SUVs, and light trucks where wheel speed sensing is used for anti-lock and stability systems. It is often reported by owners of European, Asian, and American makes in vehicles equipped with electronic stability control and wheel speed sensors. Vehicle-specific implementations vary, so confirm the exact subsystem description for your make, model, and year using wiring diagrams and module documentation.