Code
C1116
HYUNDAI
C — Chassis
Sensor GND
Views:
UK: 9
EN: 16
RU: 13
AI status
Completed
Completed
100%
Causes
- Open or corroded ground connection at sensor or harness
- Broken or chafed ground wire in the harness
- Poor chassis or battery negative grounding
- Water or corrosion in sensor connector
- Short to battery positive or other circuit
- Damaged sensor internal ground
Symptoms
- Related system warning lamp (ABS, ESC, VDC or chassis control) illuminated
- Intermittent or erratic sensor readings in live data
- Reduced function or disablement of affected safety/drive systems
- DTC remains after routine driving or returns after clearing
What to check
- Retrieve freeze frame and live data from scan tool to identify which sensor is involved
- Visually inspect sensor connector and wiring for damage, corrosion, or contamination
- Inspect battery negative and chassis ground straps for tightness and corrosion
- Backprobe sensor ground pin with ignition ON and measure voltage to chassis
- Check continuity between sensor ground pin and ECU ground/chassis (ohms)
- Wiggle harness and connectors while monitoring live data/scan tool for intermittent changes
Signal parameters
- Sensor ground voltage to chassis: ~0.0 V (should be near 0 V with key ON)
- Sensor ground continuity to ECU/chassis: low resistance (typically
- Reference voltage to sensor (if present): typically ~5 V — verify against live data
- No voltage present on ground pin; any significant voltage (>0.5 V) indicates high resistance/poor ground
Diagnostic algorithm
- Connect a scan tool, record active/confirmed codes and live data; note which sensor is flagged. 2) Visually inspect sensor connector, wiring and nearby components for corrosion, pin damage, or water ingress. 3) With ignition ON (engine OFF), backprobe the sensor ground pin and measure voltage to chassis; expect ~0 V. 4) Measure continuity (ohms) between sensor ground pin and known good chassis ground/ECU ground. Replace or repair if continuity is high or open. 5) Inspect/clean battery negative and chassis ground straps; torque to spec. 6) Wiggle the harness and connectors while watching live data to locate intermittent faults. 7) If a short to positive is suspected, isolate sections of wiring and perform resistance/voltage checks to locate short. 8) Repair wiring or connector (crimp/solder and heat-shrink or replace connector as required). 9) Clear codes and perform a road or functional test; re-scan to confirm repair. 10) If wiring and connectors test good and problem persists, suspect sensor internal fault or control module ground—consult technical service bulletins and consider module testing/replacement as last step.
Likely causes
- Corroded or loose sensor ground connector
- Broken/abraded ground wire between sensor and ECU/chassis
- Bad chassis/battery negative ground connection
Fault status
Status
Control module detected abnormal sensor ground circuit (open/high resistance or short). This stores a diagnostic trouble code and may limit or disable affected systems until the ground fault is corrected.
Repair difficulty: Medium
Diagnostic time: 0.5-2.0 hours
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