Code
C1281
HUMMER
C — Chassis
VSES Sensors Uncorrelated
Views:
UK: 10
EN: 24
RU: 13
AI status
Completed
Completed
100%
Causes
- Faulty wheel/vehicle speed sensors (passive or active)
- Damaged or missing tone/reluctor ring at wheel or transmission
- Corroded, damaged or loose sensor connectors or wiring harness
- Intermittent open, short or high-resistance connection in sensor circuit
- Faulty ABS/traction control module or gateway module (bad inputs or processing)
- Incorrect software/calibration or failed recent module update
Symptoms
- ABS, traction control (TC) or stability control (ESP) warning lamp illuminated
- Cruise control may be disabled or behave erratically
- Speedometer or odometer reading inconsistent or jumping
- Loss or reduction of traction/stability control functionality
- Intermittent fault — warning may occur only while turning, braking, or under load
- Diagnostic trouble codes related to wheel speed, VSS, or CAN communication present
What to check
- Connect a capable scan tool and record freeze frame and live data for all related speed sensors (wheel speeds, vehicle speed sensor, transmission output)
- Check for other stored codes (ABS, CAN, PCM) that could point to root cause
- Compare wheel speed sensor values at rest and during a slow, controlled road test — all wheels should report proportional speeds
- Visually inspect sensor connectors, wiring harnesses, and tone rings for damage, contamination, missing teeth or looseness
- Perform a wiggle test on suspect wiring/connectors while watching live data for intermittent changes
- Check fuses and engine/body grounds related to ABS/traction modules
Signal parameters
- Passive (variable reluctor) sensor: produces AC voltage that increases with speed — small mV to ~1–2 VAC at low speeds, increasing with wheel speed (exact values vehicle-specific)
- Active (Hall/VR) sensor: powered (typically 5V) with a digital square-wave output ~0–5 V; frequency rises with speed
- Typical wheel-speed message update: tens to hundreds of Hz on module CAN messages (module-specific)
- Resistance/continuity: passive sensors often have measurable coil resistance (manufacturer spec required) — open or short indicates failure
Diagnostic algorithm
- Retrieve and record all stored DTCs, freeze frame and live data for wheel speeds, VSS and related modules. Do not assume a single code is the only fault.
- Clear codes and perform a controlled road test while monitoring live sensor data to reproduce the fault. Note which sensors diverge and under what conditions.
- Visually inspect connectors, pins and wiring at each suspect sensor and at the ABS/traction module. Repair any corrosion, bent pins or intermittent fits.
- With ignition on, backprobe the suspect sensor connector: for passive sensors measure AC output while rotating the wheel (jack safely supported), for active sensors confirm supply voltage (typically 5 V) and switching output (0–5 V).
- Measure sensor coil resistance or continuity against manufacturer specs; check for short to ground or open circuit.
- Inspect tone/reluctor rings for missing/chipped teeth, heavy rust or debris and correct wheel hub alignment or component damage if present.
- Wiggle the harness and connectors while watching live data to locate intermittent faults.
- If wiring and sensors test good, check module grounds and CAN-bus integrity; scan for communication errors and inspect module connectors.
- If a specific sensor or harness is confirmed faulty, replace the sensor or repair harness/tone ring as required.
- After repairs clear codes, perform relearn/calibration procedures if required by the manufacturer, then road test to verify the issue is resolved.
- If faults persist after sensors and wiring are verified, consider module diagnostics, reflashing software or replacing the ABS/traction module per factory procedures.
Likely causes
- One or more wheel speed sensors failed or producing noisy signal
- Reluctor/tone ring damage or contamination on one wheel or transmission output
- Connector corrosion or wiring chafing at suspension/steering that breaks signal intermittently
- ABS module input channel fault or poor ground causing misreading of otherwise good sensors
Fault status
Status
VSES Sensors Uncorrelated — multiple speed/position sensors are reporting inconsistent or uncorrelated signals. This can disable ABS/traction/stability control and illuminate warning lamps.
Repair difficulty: Medium
Diagnostic time: 1–3 hours
Similar codes
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Code
C1281
HYUNDAI
C — Chassis
G-Sensor(Rear Right(RR)) | Acceleration sensor Rear-LH Malfunction | Acceleration sensor Rear-RH Malfunction | G - Sensor (Rear) | Acceleration Sensor Rear
Views:
UK: 15
EN: 24
RU: 13
AI status
Completed
Completed
100%
Causes
- Faulty wheel/vehicle speed sensors (passive or active)
- Damaged or missing tone/reluctor ring at wheel or transmission
- Corroded, damaged or loose sensor connectors or wiring harness
- Intermittent open, short or high-resistance connection in sensor circuit
- Faulty ABS/traction control module or gateway module (bad inputs or processing)
- Incorrect software/calibration or failed recent module update
Symptoms
- ABS, traction control (TC) or stability control (ESP) warning lamp illuminated
- Cruise control may be disabled or behave erratically
- Speedometer or odometer reading inconsistent or jumping
- Loss or reduction of traction/stability control functionality
- Intermittent fault — warning may occur only while turning, braking, or under load
- Diagnostic trouble codes related to wheel speed, VSS, or CAN communication present
What to check
- Connect a capable scan tool and record freeze frame and live data for all related speed sensors (wheel speeds, vehicle speed sensor, transmission output)
- Check for other stored codes (ABS, CAN, PCM) that could point to root cause
- Compare wheel speed sensor values at rest and during a slow, controlled road test — all wheels should report proportional speeds
- Visually inspect sensor connectors, wiring harnesses, and tone rings for damage, contamination, missing teeth or looseness
- Perform a wiggle test on suspect wiring/connectors while watching live data for intermittent changes
- Check fuses and engine/body grounds related to ABS/traction modules
Signal parameters
- Passive (variable reluctor) sensor: produces AC voltage that increases with speed — small mV to ~1–2 VAC at low speeds, increasing with wheel speed (exact values vehicle-specific)
- Active (Hall/VR) sensor: powered (typically 5V) with a digital square-wave output ~0–5 V; frequency rises with speed
- Typical wheel-speed message update: tens to hundreds of Hz on module CAN messages (module-specific)
- Resistance/continuity: passive sensors often have measurable coil resistance (manufacturer spec required) — open or short indicates failure
Diagnostic algorithm
- Retrieve and record all stored DTCs, freeze frame and live data for wheel speeds, VSS and related modules. Do not assume a single code is the only fault.
- Clear codes and perform a controlled road test while monitoring live sensor data to reproduce the fault. Note which sensors diverge and under what conditions.
- Visually inspect connectors, pins and wiring at each suspect sensor and at the ABS/traction module. Repair any corrosion, bent pins or intermittent fits.
- With ignition on, backprobe the suspect sensor connector: for passive sensors measure AC output while rotating the wheel (jack safely supported), for active sensors confirm supply voltage (typically 5 V) and switching output (0–5 V).
- Measure sensor coil resistance or continuity against manufacturer specs; check for short to ground or open circuit.
- Inspect tone/reluctor rings for missing/chipped teeth, heavy rust or debris and correct wheel hub alignment or component damage if present.
- Wiggle the harness and connectors while watching live data to locate intermittent faults.
- If wiring and sensors test good, check module grounds and CAN-bus integrity; scan for communication errors and inspect module connectors.
- If a specific sensor or harness is confirmed faulty, replace the sensor or repair harness/tone ring as required.
- After repairs clear codes, perform relearn/calibration procedures if required by the manufacturer, then road test to verify the issue is resolved.
- If faults persist after sensors and wiring are verified, consider module diagnostics, reflashing software or replacing the ABS/traction module per factory procedures.
Likely causes
- One or more wheel speed sensors failed or producing noisy signal
- Reluctor/tone ring damage or contamination on one wheel or transmission output
- Connector corrosion or wiring chafing at suspension/steering that breaks signal intermittently
- ABS module input channel fault or poor ground causing misreading of otherwise good sensors
Fault status
Status
VSES Sensors Uncorrelated — multiple speed/position sensors are reporting inconsistent or uncorrelated signals. This can disable ABS/traction/stability control and illuminate warning lamps.
Repair difficulty: Medium
Diagnostic time: 1–3 hours
Similar codes
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Code
C1281
LAND ROVER
C — Chassis
Lateral accelerometer - circuit failure
Views:
UK: 10
EN: 10
RU: 6
AI status
Completed
Completed
100%
Causes
- Faulty wheel/vehicle speed sensors (passive or active)
- Damaged or missing tone/reluctor ring at wheel or transmission
- Corroded, damaged or loose sensor connectors or wiring harness
- Intermittent open, short or high-resistance connection in sensor circuit
- Faulty ABS/traction control module or gateway module (bad inputs or processing)
- Incorrect software/calibration or failed recent module update
Symptoms
- ABS, traction control (TC) or stability control (ESP) warning lamp illuminated
- Cruise control may be disabled or behave erratically
- Speedometer or odometer reading inconsistent or jumping
- Loss or reduction of traction/stability control functionality
- Intermittent fault — warning may occur only while turning, braking, or under load
- Diagnostic trouble codes related to wheel speed, VSS, or CAN communication present
What to check
- Connect a capable scan tool and record freeze frame and live data for all related speed sensors (wheel speeds, vehicle speed sensor, transmission output)
- Check for other stored codes (ABS, CAN, PCM) that could point to root cause
- Compare wheel speed sensor values at rest and during a slow, controlled road test — all wheels should report proportional speeds
- Visually inspect sensor connectors, wiring harnesses, and tone rings for damage, contamination, missing teeth or looseness
- Perform a wiggle test on suspect wiring/connectors while watching live data for intermittent changes
- Check fuses and engine/body grounds related to ABS/traction modules
Signal parameters
- Passive (variable reluctor) sensor: produces AC voltage that increases with speed — small mV to ~1–2 VAC at low speeds, increasing with wheel speed (exact values vehicle-specific)
- Active (Hall/VR) sensor: powered (typically 5V) with a digital square-wave output ~0–5 V; frequency rises with speed
- Typical wheel-speed message update: tens to hundreds of Hz on module CAN messages (module-specific)
- Resistance/continuity: passive sensors often have measurable coil resistance (manufacturer spec required) — open or short indicates failure
Diagnostic algorithm
- Retrieve and record all stored DTCs, freeze frame and live data for wheel speeds, VSS and related modules. Do not assume a single code is the only fault.
- Clear codes and perform a controlled road test while monitoring live sensor data to reproduce the fault. Note which sensors diverge and under what conditions.
- Visually inspect connectors, pins and wiring at each suspect sensor and at the ABS/traction module. Repair any corrosion, bent pins or intermittent fits.
- With ignition on, backprobe the suspect sensor connector: for passive sensors measure AC output while rotating the wheel (jack safely supported), for active sensors confirm supply voltage (typically 5 V) and switching output (0–5 V).
- Measure sensor coil resistance or continuity against manufacturer specs; check for short to ground or open circuit.
- Inspect tone/reluctor rings for missing/chipped teeth, heavy rust or debris and correct wheel hub alignment or component damage if present.
- Wiggle the harness and connectors while watching live data to locate intermittent faults.
- If wiring and sensors test good, check module grounds and CAN-bus integrity; scan for communication errors and inspect module connectors.
- If a specific sensor or harness is confirmed faulty, replace the sensor or repair harness/tone ring as required.
- After repairs clear codes, perform relearn/calibration procedures if required by the manufacturer, then road test to verify the issue is resolved.
- If faults persist after sensors and wiring are verified, consider module diagnostics, reflashing software or replacing the ABS/traction module per factory procedures.
Likely causes
- One or more wheel speed sensors failed or producing noisy signal
- Reluctor/tone ring damage or contamination on one wheel or transmission output
- Connector corrosion or wiring chafing at suspension/steering that breaks signal intermittently
- ABS module input channel fault or poor ground causing misreading of otherwise good sensors
Fault status
Status
VSES Sensors Uncorrelated — multiple speed/position sensors are reporting inconsistent or uncorrelated signals. This can disable ABS/traction/stability control and illuminate warning lamps.
Repair difficulty: Medium
Diagnostic time: 1–3 hours
Similar codes
Workshop Manuals
Repair manuals for LAND ROVER
2
Land Rover Defender 300Tdi — Workshop Manual (1996 model year)
Workshop ManualOfficial workshop manual for the Land Rover Defender 300Tdi (from 1996 model year). Contains specifications, adjustment, fault diagnosis and step-by-step repair and overhaul procedures for engine, transmission, axles, suspension, brakes, electrical and body. Intended for dealer workshops and trained technicians.
199,00 UAH
Land Rover Defender Workshop Manual Supplement & Body Repair Manual (1999 & 2002 MY)
Workshop ManualWorkshop Manual Supplement and Body Repair Manual for the Land Rover Defender. Includes general specifications, maintenance schedules, tuning data and step‑by‑step repair procedures for engine, transmission, suspension, brakes, electrical and body repairs. Covers Defender models from 1999 and 2002 model years.
199,00 UAH
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Code
C1281
MITSUBISHI
C — Chassis
Motor fail safe relay(stuck off)
Views:
UK: 14
EN: 23
RU: 12
AI status
Completed
Completed
100%
Causes
- Faulty wheel/vehicle speed sensors (passive or active)
- Damaged or missing tone/reluctor ring at wheel or transmission
- Corroded, damaged or loose sensor connectors or wiring harness
- Intermittent open, short or high-resistance connection in sensor circuit
- Faulty ABS/traction control module or gateway module (bad inputs or processing)
- Incorrect software/calibration or failed recent module update
Symptoms
- ABS, traction control (TC) or stability control (ESP) warning lamp illuminated
- Cruise control may be disabled or behave erratically
- Speedometer or odometer reading inconsistent or jumping
- Loss or reduction of traction/stability control functionality
- Intermittent fault — warning may occur only while turning, braking, or under load
- Diagnostic trouble codes related to wheel speed, VSS, or CAN communication present
What to check
- Connect a capable scan tool and record freeze frame and live data for all related speed sensors (wheel speeds, vehicle speed sensor, transmission output)
- Check for other stored codes (ABS, CAN, PCM) that could point to root cause
- Compare wheel speed sensor values at rest and during a slow, controlled road test — all wheels should report proportional speeds
- Visually inspect sensor connectors, wiring harnesses, and tone rings for damage, contamination, missing teeth or looseness
- Perform a wiggle test on suspect wiring/connectors while watching live data for intermittent changes
- Check fuses and engine/body grounds related to ABS/traction modules
Signal parameters
- Passive (variable reluctor) sensor: produces AC voltage that increases with speed — small mV to ~1–2 VAC at low speeds, increasing with wheel speed (exact values vehicle-specific)
- Active (Hall/VR) sensor: powered (typically 5V) with a digital square-wave output ~0–5 V; frequency rises with speed
- Typical wheel-speed message update: tens to hundreds of Hz on module CAN messages (module-specific)
- Resistance/continuity: passive sensors often have measurable coil resistance (manufacturer spec required) — open or short indicates failure
Diagnostic algorithm
- Retrieve and record all stored DTCs, freeze frame and live data for wheel speeds, VSS and related modules. Do not assume a single code is the only fault.
- Clear codes and perform a controlled road test while monitoring live sensor data to reproduce the fault. Note which sensors diverge and under what conditions.
- Visually inspect connectors, pins and wiring at each suspect sensor and at the ABS/traction module. Repair any corrosion, bent pins or intermittent fits.
- With ignition on, backprobe the suspect sensor connector: for passive sensors measure AC output while rotating the wheel (jack safely supported), for active sensors confirm supply voltage (typically 5 V) and switching output (0–5 V).
- Measure sensor coil resistance or continuity against manufacturer specs; check for short to ground or open circuit.
- Inspect tone/reluctor rings for missing/chipped teeth, heavy rust or debris and correct wheel hub alignment or component damage if present.
- Wiggle the harness and connectors while watching live data to locate intermittent faults.
- If wiring and sensors test good, check module grounds and CAN-bus integrity; scan for communication errors and inspect module connectors.
- If a specific sensor or harness is confirmed faulty, replace the sensor or repair harness/tone ring as required.
- After repairs clear codes, perform relearn/calibration procedures if required by the manufacturer, then road test to verify the issue is resolved.
- If faults persist after sensors and wiring are verified, consider module diagnostics, reflashing software or replacing the ABS/traction module per factory procedures.
Likely causes
- One or more wheel speed sensors failed or producing noisy signal
- Reluctor/tone ring damage or contamination on one wheel or transmission output
- Connector corrosion or wiring chafing at suspension/steering that breaks signal intermittently
- ABS module input channel fault or poor ground causing misreading of otherwise good sensors
Fault status
Status
VSES Sensors Uncorrelated — multiple speed/position sensors are reporting inconsistent or uncorrelated signals. This can disable ABS/traction/stability control and illuminate warning lamps.
Repair difficulty: Medium
Diagnostic time: 1–3 hours
Similar codes
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+100 karma for a short comment :)
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Code
C1281
Other
C — Chassis
Lateral Accelerometer circuit Failure
Views:
UK: 19
EN: 33
RU: 26
AI status
Completed
Completed
100%
Causes
- Faulty wheel/vehicle speed sensors (passive or active)
- Damaged or missing tone/reluctor ring at wheel or transmission
- Corroded, damaged or loose sensor connectors or wiring harness
- Intermittent open, short or high-resistance connection in sensor circuit
- Faulty ABS/traction control module or gateway module (bad inputs or processing)
- Incorrect software/calibration or failed recent module update
Symptoms
- ABS, traction control (TC) or stability control (ESP) warning lamp illuminated
- Cruise control may be disabled or behave erratically
- Speedometer or odometer reading inconsistent or jumping
- Loss or reduction of traction/stability control functionality
- Intermittent fault — warning may occur only while turning, braking, or under load
- Diagnostic trouble codes related to wheel speed, VSS, or CAN communication present
What to check
- Connect a capable scan tool and record freeze frame and live data for all related speed sensors (wheel speeds, vehicle speed sensor, transmission output)
- Check for other stored codes (ABS, CAN, PCM) that could point to root cause
- Compare wheel speed sensor values at rest and during a slow, controlled road test — all wheels should report proportional speeds
- Visually inspect sensor connectors, wiring harnesses, and tone rings for damage, contamination, missing teeth or looseness
- Perform a wiggle test on suspect wiring/connectors while watching live data for intermittent changes
- Check fuses and engine/body grounds related to ABS/traction modules
Signal parameters
- Passive (variable reluctor) sensor: produces AC voltage that increases with speed — small mV to ~1–2 VAC at low speeds, increasing with wheel speed (exact values vehicle-specific)
- Active (Hall/VR) sensor: powered (typically 5V) with a digital square-wave output ~0–5 V; frequency rises with speed
- Typical wheel-speed message update: tens to hundreds of Hz on module CAN messages (module-specific)
- Resistance/continuity: passive sensors often have measurable coil resistance (manufacturer spec required) — open or short indicates failure
Diagnostic algorithm
- Retrieve and record all stored DTCs, freeze frame and live data for wheel speeds, VSS and related modules. Do not assume a single code is the only fault.
- Clear codes and perform a controlled road test while monitoring live sensor data to reproduce the fault. Note which sensors diverge and under what conditions.
- Visually inspect connectors, pins and wiring at each suspect sensor and at the ABS/traction module. Repair any corrosion, bent pins or intermittent fits.
- With ignition on, backprobe the suspect sensor connector: for passive sensors measure AC output while rotating the wheel (jack safely supported), for active sensors confirm supply voltage (typically 5 V) and switching output (0–5 V).
- Measure sensor coil resistance or continuity against manufacturer specs; check for short to ground or open circuit.
- Inspect tone/reluctor rings for missing/chipped teeth, heavy rust or debris and correct wheel hub alignment or component damage if present.
- Wiggle the harness and connectors while watching live data to locate intermittent faults.
- If wiring and sensors test good, check module grounds and CAN-bus integrity; scan for communication errors and inspect module connectors.
- If a specific sensor or harness is confirmed faulty, replace the sensor or repair harness/tone ring as required.
- After repairs clear codes, perform relearn/calibration procedures if required by the manufacturer, then road test to verify the issue is resolved.
- If faults persist after sensors and wiring are verified, consider module diagnostics, reflashing software or replacing the ABS/traction module per factory procedures.
Likely causes
- One or more wheel speed sensors failed or producing noisy signal
- Reluctor/tone ring damage or contamination on one wheel or transmission output
- Connector corrosion or wiring chafing at suspension/steering that breaks signal intermittently
- ABS module input channel fault or poor ground causing misreading of otherwise good sensors
Fault status
Status
VSES Sensors Uncorrelated — multiple speed/position sensors are reporting inconsistent or uncorrelated signals. This can disable ABS/traction/stability control and illuminate warning lamps.
Repair difficulty: Medium
Diagnostic time: 1–3 hours
Similar codes
Workshop Manuals
Available brands with manuals
1
LAND ROVER 2
Land Rover Defender 300Tdi — Workshop Manual (1996 model year)
Workshop ManualOfficial workshop manual for the Land Rover Defender 300Tdi (from 1996 model year). Contains specifications, adjustment, fault diagnosis and step-by-step repair and overhaul procedures for engine, transmission, axles, suspension, brakes, electrical and body. Intended for dealer workshops and trained technicians.
199,00 UAH
Land Rover Defender Workshop Manual Supplement & Body Repair Manual (1999 & 2002 MY)
Workshop ManualWorkshop Manual Supplement and Body Repair Manual for the Land Rover Defender. Includes general specifications, maintenance schedules, tuning data and step‑by‑step repair procedures for engine, transmission, suspension, brakes, electrical and body repairs. Covers Defender models from 1999 and 2002 model years.
199,00 UAH
Your experience will help others
+100 karma for a short comment :)
Was this AI description helpful?
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Send to email