Code
C0710
HUMMER
C — Chassis
Steering Position Signal Malfunction
AI status
Completed
Completed
100%
Causes
- Faulty steering angle/position sensor
- Damaged wiring harness or broken connector (open, short to power/ground)
- Corroded or loose connector at sensor or control module
- Faulty steering column module, clock spring or torque sensor
- Loss of reference power or ground to the sensor
- CAN bus or data link communication fault between sensor and control module
Symptoms
- EPS (electric power steering) warning lamp or steering assist reduced/lost
- Stability control/ABS or traction control warnings and degraded functionality
- Steering feel abnormal, intermittent loss of assist, or jerky assist
- Steering-related driver-assist features (lane keep, adaptive cruise) disabled
- Stored steering/ABS/BCM codes and possible limp mode
What to check
- Read and record all stored codes and freeze-frame data with a capable scan tool
- Check for related codes (ABS, ESP, BCM, U-codes) that indicate communication problems
- Visually inspect steering column harness, connectors, clock spring and sensor mounting
- Backprobe sensor connector: verify 5V reference, ground, and signal voltage at key angles
- Wiggle harness and connectors while monitoring live data for intermittent changes
- Confirm steering angle sensor output moves smoothly when turning wheel and returns to center
Signal parameters
- 5 V reference present at sensor (where applicable)
- Signal voltage typically 0–5 V with ~2.5 V near center (varies by sensor type)
- Signal should change smoothly and proportionally as the wheel is turned
- Update rate commonly 10–100 Hz for analog/digital sensors; CAN messages updated multiple times/sec
- No sudden jumps, flatlines, or signals stuck at 0 V or supply voltage
Diagnostic algorithm
- Connect a diagnostic scanner, record C0710 and any other codes, note freeze-frame data.
- Clear codes and attempt to re-create fault to confirm persistence.
- Visually inspect steering wheel area, clock spring, sensor connectors and harness for damage or corrosion.
- Backprobe sensor connector: verify reference voltage, ground continuity and signal variation while rotating wheel.
- Wiggle test harness and connectors while monitoring live steering angle/position signal for intermittent faults.
- If sensor uses CAN/messages, check CAN bus for errors and verify other modules communicate normally.
- If electrical supply/ground and wiring check good but signal abnormal, replace steering angle/position sensor or steering column module per manufacturer instructions.
- After repair or sensor replacement, perform required steering angle sensor calibration/relearn and clear codes.
- Road test and confirm proper operation and that no related codes return.
- If fault persists after sensor replacement and calibration, inspect/replace control module or perform detailed wiring harness repair as required.
Likely causes
- Corroded/loose connector at the steering angle sensor or control module (most common)
- Open/short in steering angle sensor signal or 5V reference wiring
- Failed steering angle sensor or steering column module
- Missing/incorrect steering angle calibration after repairs
- CAN/data-bus fault preventing valid position messages
Fault status
Status
Steering Position Signal Malfunction — steering angle/position input is missing or out of range. May disable power steering assist and stability/driver-assist functions until repaired.
Repair difficulty: Medium
Diagnostic time: 1.0-3.0 hours
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Repair manuals
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138
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