Code
C1250
HYUNDAI
C — Chassis
Front Right(FR) Height Sensor High | Height Sensor Supply Right / Pressure Sensor General Electrical Failure
Views:
UK: 14
EN: 25
RU: 15
AI status
Completed
Completed
100%
Causes
- Open or short in front-right height sensor wiring (signal, supply, or ground)
- Corroded or loose connector at the FR height/pressure sensor
- Failed front-right height or pressure sensor (internal short or high output)
- Faulty height/air suspension control module or loss of reference supply
- Blown fuse or defective power/ground for sensor circuit
- Mechanical binding or damage to the sensor or its linkage affecting readings
Symptoms
- Height/suspension warning lamp or ABS/VDC light illuminated
- Incorrect ride height at the front-right corner (too high or too low)
- Suspension leveling/auto-ride-height function disabled or not responding
- Diagnostic trouble codes stored for height sensor or suspension system
- Intermittent loss of suspension control or limp-home mode
What to check
- Retrieve freeze-frame and live data with a scan tool; note FR height sensor raw value and compare to other corners
- Visually inspect FR sensor, linkage, and wiring harness for damage, corrosion, pin push-out, or water intrusion
- Check related fuses and relays for the suspension/height sensor supply
- Backprobe sensor connector to measure reference voltage, signal voltage and ground continuity
- Wiggle harness/connectors while observing live data for intermittent changes
- Measure continuity and resistance of signal/supply/ground wires between sensor and module
Signal parameters
- Typical reference supply: ~5.0 V (vehicle-dependent) — should be within ±0.25 V of nominal
- Expected sensor output: variable 0.1–4.9 V over travel; mid-travel often ~2.5 V (confirm with live data)
- High-signal fault: sensor signal reading near supply voltage (e.g., >4.7 V) or stuck at high value
- Open-circuit: sensor signal may float or show out-of-range/high value on scan tool
- Ground continuity: low resistance to vehicle chassis (
Diagnostic algorithm
- Connect a capable scan tool. Read and record all stored DTCs, freeze-frame data, and live FR height sensor values. Note if code is current or history.
- Visually inspect the FR sensor, mounting, linkage and harness for physical damage, corrosion, water entry, or pin damage at the connector.
- With ignition ON (engine off), backprobe connector: verify reference supply voltage at sensor (typically ~5 V). If missing or incorrect, trace power/fuse/relay to module.
- Measure sensor output voltage while moving linkage slowly by hand: signal should vary smoothly across expected range. If signal is fixed high, suspect short to supply or bad sensor.
- Check sensor ground circuit continuity to chassis and to module ground. Repair any high-resistance or open grounds.
- Inspect wiring: check continuity from sensor pins to suspension control module pins, and check for shorts to battery voltage or ground. Repair chafing or damaged wiring.
- Perform a wiggle test of harness and connector while observing live data for intermittent faults; repair connector or pigtail as required.
- If wiring and connectors are good but fault remains, replace the FR height/pressure sensor with a known-good unit and re-check.
- If replacement sensor does not clear the fault, test or replace the suspension/height control module or investigate CAN/network communication faults as per manufacturer procedures.
- After repairs, clear codes and perform a road or function test; monitor live data to confirm proper sensor behaviour and that the code does not return.
Likely causes
- FR height sensor signal wire shorted to battery voltage causing high reading
- FR height sensor output open-circuit or intermittent due to connector corrosion
- FR height/pressure sensor internal failure producing out-of-range voltage
- Poor ground at suspension control module or sensor ground
- Faulty module electronics or CAN/communication fault preventing valid sensor reading
Fault status
Status
Front-right height sensor circuit: high voltage or electrical failure detected (possible sensor, wiring, supply, or module fault).
Repair difficulty: Medium
Diagnostic time: 1.0-3.0 hours
Similar codes
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Code
C1250
LAND ROVER
C — Chassis
Rear inlet valve Right rear inlet valve comparison of wheel speed
Views:
UK: 5
EN: 16
RU: 8
AI status
Completed
Completed
100%
Causes
- Open or short in front-right height sensor wiring (signal, supply, or ground)
- Corroded or loose connector at the FR height/pressure sensor
- Failed front-right height or pressure sensor (internal short or high output)
- Faulty height/air suspension control module or loss of reference supply
- Blown fuse or defective power/ground for sensor circuit
- Mechanical binding or damage to the sensor or its linkage affecting readings
Symptoms
- Height/suspension warning lamp or ABS/VDC light illuminated
- Incorrect ride height at the front-right corner (too high or too low)
- Suspension leveling/auto-ride-height function disabled or not responding
- Diagnostic trouble codes stored for height sensor or suspension system
- Intermittent loss of suspension control or limp-home mode
What to check
- Retrieve freeze-frame and live data with a scan tool; note FR height sensor raw value and compare to other corners
- Visually inspect FR sensor, linkage, and wiring harness for damage, corrosion, pin push-out, or water intrusion
- Check related fuses and relays for the suspension/height sensor supply
- Backprobe sensor connector to measure reference voltage, signal voltage and ground continuity
- Wiggle harness/connectors while observing live data for intermittent changes
- Measure continuity and resistance of signal/supply/ground wires between sensor and module
Signal parameters
- Typical reference supply: ~5.0 V (vehicle-dependent) — should be within ±0.25 V of nominal
- Expected sensor output: variable 0.1–4.9 V over travel; mid-travel often ~2.5 V (confirm with live data)
- High-signal fault: sensor signal reading near supply voltage (e.g., >4.7 V) or stuck at high value
- Open-circuit: sensor signal may float or show out-of-range/high value on scan tool
- Ground continuity: low resistance to vehicle chassis (
Diagnostic algorithm
- Connect a capable scan tool. Read and record all stored DTCs, freeze-frame data, and live FR height sensor values. Note if code is current or history.
- Visually inspect the FR sensor, mounting, linkage and harness for physical damage, corrosion, water entry, or pin damage at the connector.
- With ignition ON (engine off), backprobe connector: verify reference supply voltage at sensor (typically ~5 V). If missing or incorrect, trace power/fuse/relay to module.
- Measure sensor output voltage while moving linkage slowly by hand: signal should vary smoothly across expected range. If signal is fixed high, suspect short to supply or bad sensor.
- Check sensor ground circuit continuity to chassis and to module ground. Repair any high-resistance or open grounds.
- Inspect wiring: check continuity from sensor pins to suspension control module pins, and check for shorts to battery voltage or ground. Repair chafing or damaged wiring.
- Perform a wiggle test of harness and connector while observing live data for intermittent faults; repair connector or pigtail as required.
- If wiring and connectors are good but fault remains, replace the FR height/pressure sensor with a known-good unit and re-check.
- If replacement sensor does not clear the fault, test or replace the suspension/height control module or investigate CAN/network communication faults as per manufacturer procedures.
- After repairs, clear codes and perform a road or function test; monitor live data to confirm proper sensor behaviour and that the code does not return.
Likely causes
- FR height sensor signal wire shorted to battery voltage causing high reading
- FR height sensor output open-circuit or intermittent due to connector corrosion
- FR height/pressure sensor internal failure producing out-of-range voltage
- Poor ground at suspension control module or sensor ground
- Faulty module electronics or CAN/communication fault preventing valid sensor reading
Fault status
Status
Front-right height sensor circuit: high voltage or electrical failure detected (possible sensor, wiring, supply, or module fault).
Repair difficulty: Medium
Diagnostic time: 1.0-3.0 hours
Similar codes
Workshop Manuals
Repair manuals for LAND ROVER
3
Land Rover Defender 300Tdi — Workshop Manual (1996 model year)
Workshop Manual199,00 UAH
Land Rover Defender Workshop Manual Supplement & Body Repair Manual (1999 & 2002 MY)
Workshop Manual199,00 UAH
Land Rover Range Rover — Electrical Library (LRL 0453ENG, 2002)
Workshop Manual199,00 UAH
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Code
C1250
Other
C — Chassis
ABS Inlet Valve Coil LR Circuit Failure
Views:
UK: 13
EN: 30
RU: 17
AI status
Completed
Completed
100%
Causes
- Open or short in front-right height sensor wiring (signal, supply, or ground)
- Corroded or loose connector at the FR height/pressure sensor
- Failed front-right height or pressure sensor (internal short or high output)
- Faulty height/air suspension control module or loss of reference supply
- Blown fuse or defective power/ground for sensor circuit
- Mechanical binding or damage to the sensor or its linkage affecting readings
Symptoms
- Height/suspension warning lamp or ABS/VDC light illuminated
- Incorrect ride height at the front-right corner (too high or too low)
- Suspension leveling/auto-ride-height function disabled or not responding
- Diagnostic trouble codes stored for height sensor or suspension system
- Intermittent loss of suspension control or limp-home mode
What to check
- Retrieve freeze-frame and live data with a scan tool; note FR height sensor raw value and compare to other corners
- Visually inspect FR sensor, linkage, and wiring harness for damage, corrosion, pin push-out, or water intrusion
- Check related fuses and relays for the suspension/height sensor supply
- Backprobe sensor connector to measure reference voltage, signal voltage and ground continuity
- Wiggle harness/connectors while observing live data for intermittent changes
- Measure continuity and resistance of signal/supply/ground wires between sensor and module
Signal parameters
- Typical reference supply: ~5.0 V (vehicle-dependent) — should be within ±0.25 V of nominal
- Expected sensor output: variable 0.1–4.9 V over travel; mid-travel often ~2.5 V (confirm with live data)
- High-signal fault: sensor signal reading near supply voltage (e.g., >4.7 V) or stuck at high value
- Open-circuit: sensor signal may float or show out-of-range/high value on scan tool
- Ground continuity: low resistance to vehicle chassis (
Diagnostic algorithm
- Connect a capable scan tool. Read and record all stored DTCs, freeze-frame data, and live FR height sensor values. Note if code is current or history.
- Visually inspect the FR sensor, mounting, linkage and harness for physical damage, corrosion, water entry, or pin damage at the connector.
- With ignition ON (engine off), backprobe connector: verify reference supply voltage at sensor (typically ~5 V). If missing or incorrect, trace power/fuse/relay to module.
- Measure sensor output voltage while moving linkage slowly by hand: signal should vary smoothly across expected range. If signal is fixed high, suspect short to supply or bad sensor.
- Check sensor ground circuit continuity to chassis and to module ground. Repair any high-resistance or open grounds.
- Inspect wiring: check continuity from sensor pins to suspension control module pins, and check for shorts to battery voltage or ground. Repair chafing or damaged wiring.
- Perform a wiggle test of harness and connector while observing live data for intermittent faults; repair connector or pigtail as required.
- If wiring and connectors are good but fault remains, replace the FR height/pressure sensor with a known-good unit and re-check.
- If replacement sensor does not clear the fault, test or replace the suspension/height control module or investigate CAN/network communication faults as per manufacturer procedures.
- After repairs, clear codes and perform a road or function test; monitor live data to confirm proper sensor behaviour and that the code does not return.
Likely causes
- FR height sensor signal wire shorted to battery voltage causing high reading
- FR height sensor output open-circuit or intermittent due to connector corrosion
- FR height/pressure sensor internal failure producing out-of-range voltage
- Poor ground at suspension control module or sensor ground
- Faulty module electronics or CAN/communication fault preventing valid sensor reading
Fault status
Status
Front-right height sensor circuit: high voltage or electrical failure detected (possible sensor, wiring, supply, or module fault).
Repair difficulty: Medium
Diagnostic time: 1.0-3.0 hours
Similar codes
Workshop Manuals
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Land Rover Defender 300Tdi — Workshop Manual (1996 model year)
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