Code
C1430
HYUNDAI
C — Chassis
Overtemperature Detected
Views:
UK: 14
EN: 17
RU: 18
AI status
Completed
Completed
100%
Causes
- Actual overheating of the control module or nearby component (pump, valve, motor, power electronics)
- Blocked ventilation or cooling, contaminated/low brake fluid restricting heat dissipation
- Electrical overload or high resistance causing excessive heating (short, poor connection, corroded terminal)
- Failed temperature sensor or open/shorted sensor circuit
- Internal module fault (driver circuits, thermal protection, PCB damage)
- Software or calibration error reporting false overtemperature
Symptoms
- ABS, ESC (VSC), or brake system warning lamp illuminated
- Reduced or disabled ABS/traction control functionality
- Intermittent system operation that returns after cooling
- Unusual smells (hot/electrical) or visible heat damage near module
- Stored freeze-frame data showing elevated temperature values
What to check
- Read DTCs and freeze-frame data with a capable scan tool; note reported temperature and operating conditions
- Visual inspection for heat damage, melted insulation, corrosion or oil/fluid contamination around module and harness
- Check brake fluid level and condition; replace if contaminated or aged
- Inspect and wiggle harness connectors, check for loose/corroded terminals and proper grounding
- Measure module power and ground voltages during operation; compare to nominal battery voltage
- If available, monitor live temperature sensor data or module internal temperature via scan tool
Signal parameters
- Temperature sensor output typically reported over CAN as °C or via 0–5 V analog; verify with manufacturer data
- Expected idle/normal operating temps: within ambient to typical under-hood range; fault occurs when reported temp exceeds module threshold
- Pump/motor current draw: should be within manufacturer-specified range; abnormally high current indicates mechanical or hydraulic binding
- Power supply: module supply should remain near battery voltage (within ~0.5–1.0 V under load); large drops indicate wiring or connection issues
Diagnostic algorithm
- Retrieve all stored codes and freeze-frame data. Note conditions when C1430 set (vehicle speed, engine temp, recent braking events).
- Visually inspect ABS/related module and wiring for heat damage, corrosion, loose connectors, or fluid contamination. Secure grounds.
- Check brake fluid level/condition; correct as required. Replace fluid if contaminated or overdue.
- With a scan tool, monitor module internal temperature (if available) and related sensor values while attempting to recreate the condition safely (short test drives or ABS activation on low-traction surface).
- Measure supply and ground voltages at module during normal operation and during test; look for voltage drops or spikes.
- Measure pump/motor current during activation. High current suggests hydraulic restriction or failing motor; low/erratic current may indicate electrical fault.
- Inspect and test temperature sensor circuit for open/short and verify sensor output with a multimeter/oscilloscope against expected behavior as temp changes.
- If wiring and sensors check good and overheating confirmed, consider module replacement or repair per manufacturer service information. Follow safe procedures for module replacement and bleeding brakes if needed.
- After repairs, clear codes and verify the fault does not return under identical operating conditions.
Likely causes
- ABS/ESP hydraulic pump running excessively and overheating (stuck valve or repeated ABS activation)
- Damaged or loose power/ground connections to the control module increasing resistance and heat
- Contaminated/old brake fluid reducing cooling and increasing component temperature
- Failed temperature sensor inside the module or bad sensor wiring harness
- Internal control module failure requiring replacement
Fault status
Status
Overtemperature detected — control module/component temperature above permitted threshold. System may be limited until cooled; inspect module, wiring, and related thermal sensors.
Repair difficulty: Medium
Diagnostic time: 1-3 hours
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