Code
C1381
HYUNDAI
C — Chassis
Sensor Internal Error
Views:
UK: 15
EN: 29
RU: 22
AI status
Completed
Completed
100%
Causes
- Failed sensor internal electronics or circuitry
- Corroded, bent or damaged sensor connector pins
- Open/shorted wiring between sensor and control module
- Intermittent power (reference voltage) or ground loss
- Water ingress or contamination at the sensor
- Faulty control module or CAN bus communication errors
Symptoms
- ABS, ESC or traction control warning lamp illuminated
- Loss or limited functionality of ABS/stability/traction systems
- Diagnostic trouble code C1381 stored in chassis control module
- Intermittent or permanent fault indications
- Noisy or erratic sensor live-data values (if readable)
What to check
- Read trouble codes and freeze-frame with a scan tool; note related codes and module ID
- Check battery voltage and charging system before testing sensors
- Visually inspect the sensor, connector, and wiring for damage, corrosion or moisture
- Verify connector pins are clean, straight and fully seated
- Check reference voltage and ground at the sensor with key on
- Monitor live-data or raw sensor values with scan tool for plausibility
Signal parameters
- Reference voltage (typically 5 V) present at sensor connector pins
- Sensor output voltage or frequency within expected range (spec depends on sensor type)
- Sensor resistance/continuity within manufacturer specification
- Stable ground continuity (
- Valid CAN message for sensor present on bus (check ID and frequency)
- No repeated checksum or communication error messages
Diagnostic algorithm
- Connect a capable scan tool, record C1381 and any related DTCs, capture freeze-frame and live data.
- Inspect sensor and harness for physical damage, corrosion, water entry or connector pin issues; repair as needed.
- With harness connected, verify reference voltage and ground at the sensor connector (key ON). Compare to spec.
- Check sensor output (voltage/frequency) while operating or simulating conditions; verify within expected range.
- Perform continuity/resistance checks from sensor pins back to the control module to rule out wiring faults.
- Wiggle test wiring and connector while monitoring live data for intermittent changes.
- If available, swap with a known-good sensor of same type (or use diagnostic bench test) to confirm internal sensor fault.
- If sensor swap fixes the fault, replace the defective sensor. If not, inspect/replace wiring or repair/replace the control module as indicated.
- Check for applicable technical service bulletins (TSBs) or software updates for the control module; reflash if required.
- Clear codes, perform a road or functional test, and verify the fault does not return and systems operate normally.
Likely causes
- Sensor hardware failure (internal short/open)
- Poor connector contact or corrosion at sensor plug
- Loss of reference voltage or ground to the sensor
- Damaged wiring harness (pinched, chafed, rodent damage)
- Control module not receiving valid sensor data (module fault or CAN issue)
Fault status
Status
C1381 — Sensor internal circuit/self-test failure detected. Service recommended.
Repair difficulty: Medium
Diagnostic time: 1.0-2.0 hours
Similar codes
Your experience will help others
+100 karma for a short comment :)
Was this AI description helpful?
Your feedback helps improve AI descriptions.
👍 Like
0
👎 Dislike
0
Send to email
Code
C1381
MITSUBISHI
C — Chassis
Straight G SNSR.stuck/low gain
Views:
UK: 18
EN: 30
RU: 23
AI status
Completed
Completed
100%
Causes
- Failed sensor internal electronics or circuitry
- Corroded, bent or damaged sensor connector pins
- Open/shorted wiring between sensor and control module
- Intermittent power (reference voltage) or ground loss
- Water ingress or contamination at the sensor
- Faulty control module or CAN bus communication errors
Symptoms
- ABS, ESC or traction control warning lamp illuminated
- Loss or limited functionality of ABS/stability/traction systems
- Diagnostic trouble code C1381 stored in chassis control module
- Intermittent or permanent fault indications
- Noisy or erratic sensor live-data values (if readable)
What to check
- Read trouble codes and freeze-frame with a scan tool; note related codes and module ID
- Check battery voltage and charging system before testing sensors
- Visually inspect the sensor, connector, and wiring for damage, corrosion or moisture
- Verify connector pins are clean, straight and fully seated
- Check reference voltage and ground at the sensor with key on
- Monitor live-data or raw sensor values with scan tool for plausibility
Signal parameters
- Reference voltage (typically 5 V) present at sensor connector pins
- Sensor output voltage or frequency within expected range (spec depends on sensor type)
- Sensor resistance/continuity within manufacturer specification
- Stable ground continuity (
- Valid CAN message for sensor present on bus (check ID and frequency)
- No repeated checksum or communication error messages
Diagnostic algorithm
- Connect a capable scan tool, record C1381 and any related DTCs, capture freeze-frame and live data.
- Inspect sensor and harness for physical damage, corrosion, water entry or connector pin issues; repair as needed.
- With harness connected, verify reference voltage and ground at the sensor connector (key ON). Compare to spec.
- Check sensor output (voltage/frequency) while operating or simulating conditions; verify within expected range.
- Perform continuity/resistance checks from sensor pins back to the control module to rule out wiring faults.
- Wiggle test wiring and connector while monitoring live data for intermittent changes.
- If available, swap with a known-good sensor of same type (or use diagnostic bench test) to confirm internal sensor fault.
- If sensor swap fixes the fault, replace the defective sensor. If not, inspect/replace wiring or repair/replace the control module as indicated.
- Check for applicable technical service bulletins (TSBs) or software updates for the control module; reflash if required.
- Clear codes, perform a road or functional test, and verify the fault does not return and systems operate normally.
Likely causes
- Sensor hardware failure (internal short/open)
- Poor connector contact or corrosion at sensor plug
- Loss of reference voltage or ground to the sensor
- Damaged wiring harness (pinched, chafed, rodent damage)
- Control module not receiving valid sensor data (module fault or CAN issue)
Fault status
Status
C1381 — Sensor internal circuit/self-test failure detected. Service recommended.
Repair difficulty: Medium
Diagnostic time: 1.0-2.0 hours
Similar codes
Your experience will help others
+100 karma for a short comment :)
Was this AI description helpful?
Your feedback helps improve AI descriptions.
👍 Like
0
👎 Dislike
0
Send to email