Code
C2115
Generic
C — Chassis
Chassis sensor signal circuit malfunction
Views:
UK: 0
EN: 0
RU: 0
AI status
Completed
Completed
100%
Causes
- Open, short to ground, or short to battery in sensor wiring
- Corroded or loose sensor connector or terminal
- Failed chassis sensor (wheel speed, steering angle, yaw/accel, brake pressure)
- Poor ground or low supply voltage to sensor/control module
- Faulty ABS/ESP/chassis control module or internal input circuitry
- CAN/data-bus communication errors or ECU software issue
Symptoms
- ABS, ESC/ESP or traction control warning light illuminated
- Loss or reduction of ABS/ESC/traction control function
- Inconsistent or missing wheel speed or vehicle speed reading
- Intermittent steering assist or stability control intervention
- Diagnostic trouble codes stored for related sensors or communications
What to check
- Read stored trouble codes and freeze frame with a scan tool; note related codes and occurrence frequency
- Verify battery voltage is within specification (typically ~12.6 V at rest, ~13.5–14.5 V while running)
- Visually inspect wiring, connectors, and sensor mounting points for damage, corrosion, or water ingress
- Backprobe sensor connector to measure supply, ground and signal while operating or spinning the wheel (if safe)
- Check module grounds and power fuses/relays related to ABS/ESP/control module
- Verify CAN/data-bus communication to the chassis control module with a scan tool
Signal parameters
- Hall-effect sensor: 0–5 V square wave; typically idle ~0.5–2.5 V switching to near 0–5 V depending on design
- Variable reluctance (magnetic) wheel speed sensor: AC voltage that increases with wheel speed (may be tens of mV at low speed to volts at higher speed)
- Potentiometric/analog angle or pressure sensors: typically 0.5–4.5 V range for valid travel
- Yaw/accel sensors: digital/CAN message at module-specific data rate (check scan tool live data)
- Expected CAN bus voltages: CAN_H typically ~2.5–3.5 V idle, CAN_L ~1.5–1.0 V idle (verify per vehicle)
Diagnostic algorithm
- Retrieve C2115 and any related codes. Record freeze-frame and live data for implicated sensors.
- Check vehicle battery and main power/ground to ABS/ESP module. Repair poor battery or ground connections first.
- Perform visual inspection of suspected sensor wiring and connectors (look for abrasion, pin damage, corrosion, water).
- Backprobe the sensor connector: verify reference voltage/power and ground are present with ignition ON. If missing, trace power/ground circuit and fuses/relays.
- With connector connected (where safe), monitor sensor signal with a multimeter or oscilloscope while operating the system or spinning the wheel. Compare to expected signal parameters.
- If signal absent or out of range, disconnect connector and check for short to ground or battery using an ohmmeter; repair wiring as needed.
- If wiring and powers are good but signal still faulty, replace the suspect sensor and retest.
- If sensor replacement does not clear the fault, check module inputs and CAN communication. Use a known-good scan tool to command/monitor messages and consider replacing or reprogramming the chassis control module if internal failure is suspected.
- After repairs, clear codes and perform a road test or system activation to confirm repair and that C2115 does not return.
- If intermittent, perform extended driving or wiggle-testing to reproduce and locate intermittent connector/wiring faults.
Likely causes
- Damaged wiring harness at wheel/steering area (pinched/abraded)
- Sensor connector contaminated with corrosion or moisture
- Failed wheel speed or steering angle sensor due to debris or impact
- Loose ground strap or corroded chassis ground near module
- Intermittent connector contact causing sporadic signal loss
Fault status
Status
Chassis sensor signal circuit malfunction — module detected abnormal or missing input from a chassis sensor. May be caused by wiring, connector, sensor, or module fault.
Repair difficulty: Medium
Diagnostic time: 0.5-3.0 hours
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Code
C2115
HYUNDAI
C — Chassis
Valve Relay Electrical
Views:
UK: 11
EN: 19
RU: 12
AI status
Completed
Completed
100%
Causes
- Open, short to ground, or short to battery in sensor wiring
- Corroded or loose sensor connector or terminal
- Failed chassis sensor (wheel speed, steering angle, yaw/accel, brake pressure)
- Poor ground or low supply voltage to sensor/control module
- Faulty ABS/ESP/chassis control module or internal input circuitry
- CAN/data-bus communication errors or ECU software issue
Symptoms
- ABS, ESC/ESP or traction control warning light illuminated
- Loss or reduction of ABS/ESC/traction control function
- Inconsistent or missing wheel speed or vehicle speed reading
- Intermittent steering assist or stability control intervention
- Diagnostic trouble codes stored for related sensors or communications
What to check
- Read stored trouble codes and freeze frame with a scan tool; note related codes and occurrence frequency
- Verify battery voltage is within specification (typically ~12.6 V at rest, ~13.5–14.5 V while running)
- Visually inspect wiring, connectors, and sensor mounting points for damage, corrosion, or water ingress
- Backprobe sensor connector to measure supply, ground and signal while operating or spinning the wheel (if safe)
- Check module grounds and power fuses/relays related to ABS/ESP/control module
- Verify CAN/data-bus communication to the chassis control module with a scan tool
Signal parameters
- Hall-effect sensor: 0–5 V square wave; typically idle ~0.5–2.5 V switching to near 0–5 V depending on design
- Variable reluctance (magnetic) wheel speed sensor: AC voltage that increases with wheel speed (may be tens of mV at low speed to volts at higher speed)
- Potentiometric/analog angle or pressure sensors: typically 0.5–4.5 V range for valid travel
- Yaw/accel sensors: digital/CAN message at module-specific data rate (check scan tool live data)
- Expected CAN bus voltages: CAN_H typically ~2.5–3.5 V idle, CAN_L ~1.5–1.0 V idle (verify per vehicle)
Diagnostic algorithm
- Retrieve C2115 and any related codes. Record freeze-frame and live data for implicated sensors.
- Check vehicle battery and main power/ground to ABS/ESP module. Repair poor battery or ground connections first.
- Perform visual inspection of suspected sensor wiring and connectors (look for abrasion, pin damage, corrosion, water).
- Backprobe the sensor connector: verify reference voltage/power and ground are present with ignition ON. If missing, trace power/ground circuit and fuses/relays.
- With connector connected (where safe), monitor sensor signal with a multimeter or oscilloscope while operating the system or spinning the wheel. Compare to expected signal parameters.
- If signal absent or out of range, disconnect connector and check for short to ground or battery using an ohmmeter; repair wiring as needed.
- If wiring and powers are good but signal still faulty, replace the suspect sensor and retest.
- If sensor replacement does not clear the fault, check module inputs and CAN communication. Use a known-good scan tool to command/monitor messages and consider replacing or reprogramming the chassis control module if internal failure is suspected.
- After repairs, clear codes and perform a road test or system activation to confirm repair and that C2115 does not return.
- If intermittent, perform extended driving or wiggle-testing to reproduce and locate intermittent connector/wiring faults.
Likely causes
- Damaged wiring harness at wheel/steering area (pinched/abraded)
- Sensor connector contaminated with corrosion or moisture
- Failed wheel speed or steering angle sensor due to debris or impact
- Loose ground strap or corroded chassis ground near module
- Intermittent connector contact causing sporadic signal loss
Fault status
Status
Chassis sensor signal circuit malfunction — module detected abnormal or missing input from a chassis sensor. May be caused by wiring, connector, sensor, or module fault.
Repair difficulty: Medium
Diagnostic time: 0.5-3.0 hours
Similar codes
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