Code
C2242
Generic
C — Chassis
Steering Angle Sensor B Circuit Range/Performance
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EN: 1
RU: 2
AI status
Completed
Completed
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Causes
- Faulty steering angle sensor (channel B)
- Damaged, corroded, loose or shorted wiring/connectors in the sensor circuit (power, ground, signal)
- Incorrect or lost sensor reference voltage or ground
- Intermittent connection (wiggle/intermittent failure)
- Faulty ABS/ESC/steering control module or internal module calibration error
- Improper sensor alignment/calibration (zero-point not set)
Symptoms
- Illuminated ABS, ESC or Traction Control warning lamp
- Steering angle-related warnings on dash (e.g., 'Service Stability')
- Intermittent or persistent diagnostic trouble code C2242 stored
- Reduced or disabled stability/traction control intervention
- Possible unusual behavior from steering angle-dependent systems
- No obvious steering feel change (mechanical steering may still feel normal)
What to check
- Retrieve DTCs and freeze-frame data with a scan tool; note conditions when the fault set
- Check for related codes (ABS, ESC, other steering angle codes)
- Visual inspection of steering column area, sensor connector and harness for damage, corrosion or looseness
- Verify battery voltage and proper vehicle grounding
- Compare live data: steering angle sensor B vs sensor A (if available) and vs vehicle speed/wheel angle data
- Wiggle harness/connectors while monitoring live data to reproduce the fault
Signal parameters
- Typical supply/reference voltage: ~5.0 V (verify with vehicle spec)
- Signal output (typical): ~0.5–4.5 V proportional to steering angle (varies by manufacturer)
- Expected ground at sensor: ~0 V
- Angle output range: ±360–±720 degrees total rotation (reported as degrees or counts over CAN)
- Resolution: often 0.1–1.0 degree increments (depends on sensor)
- Resistance (for some potentiometric sensors): few kiloohms across terminals (check OEM spec)
Diagnostic algorithm
- Connect a capable scan tool. Record freeze-frame data and note when C2242 set (vehicle speed, steering position, ignition status).
- Check for other related codes (ABS/ESC/steering). If multiple modules report steering angle faults, consider shared power/ground issue.
- Visually inspect sensor connector and wiring at the steering column for corrosion, pulled pins, pinched wires or physical damage.
- With ignition ON, monitor live data for Steering Angle Sensor B and Steering Angle Sensor A (if present). Verify both tracks move together and that B is within expected range relative to A and wheel movement.
- Perform wiggle test on harness and connectors while observing live data to identify intermittent faults.
- Measure reference voltage and ground at the sensor connector. Compare to spec. If reference voltage missing or noisy, trace back to fuse, ignition feed or module power.
- Measure signal voltage while slowly turning the steering wheel through full range. Signal should change smoothly without jumps or dropouts. Check resistance where applicable per OEM procedure.
- If wiring and supply are good but signal is out of range or erratic, try disconnecting the sensor and observe codes/live data behavior per service manual before replacement.
- If a sensor is replaced or repaired, clear codes and perform required steering angle sensor calibration/zero-point procedure with the scan tool and perform a road test to verify.
- If fault persists after sensor replacement and calibration, investigate ABS/ESC control module inputs/grounds and consider module fault or programming issue.
Likely causes
- Corroded or loose connector at the steering angle sensor
- Broken or pinched signal wire between sensor and control module
- Failed steering angle sensor element (potentiometer or encoder)
- Loss of reference voltage or ground to sensor
- Sensor needs recalibration after battery disconnect or steering work
Fault status
Status
When C2242 is set the stability/traction control system may be disabled or limited. The ABS/ESC warning lamp and/or a stability system message may display. The fault is stored in module memory and may include freeze-frame data indicating the vehicle and steering conditions when the error occurred. Clearing the code without correcting the root cause may result in reoccurrence.
Repair difficulty: Medium
Diagnostic time: 1.0-3.0 hours
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