Code
B1443
LAND ROVER
B — Body
left rear parking assistance side sensor
Views:
UK: 3
EN: 4
RU: 3
AI status
Completed
Completed
100%
Causes
- Faulty left rear side parking sensor (failed transducer or internal electronics)
- Damaged connector, corroded pins, or poor connection at the sensor
- Wire harness damage (open, short to ground or battery, chafing)
- Poor ground or supply voltage to the sensor
- Water ingress or contamination of sensor or connector
- Fault in parking aid control module or related CAN/LIN bus communication
Symptoms
- Rear parking aid warning displayed on dash or message centre
- Left rear side sensor not detecting objects or giving false detections
- Parksense/parking aid disabled or partial system operation
- Audible warning chime or continuous beeping in reverse
- Stored DTC B1443 in module memory
What to check
- Read and record all stored codes and freeze/frame data with a diagnostic scanner
- Inspect left rear sensor and surrounding bumper area for physical damage
- Visually inspect sensor connector for corrosion, bent pins, or water
- Check harness along bumper for damage, pinches, or abrasion
- Verify battery voltage and chassis/engine ground condition
- Confirm if fault is permanent or intermittent by cycling ignition and activating parking aid
Signal parameters
- Sensor supply voltage: approx. vehicle battery voltage (about 11–14 V) when key on/engine running
- Sensor ground: near 0 Ω to chassis (verify continuity)
- Ultrasonic transducer frequency: typical ultrasonic parking sensors operate near ~40 kHz (module-driven pulses)
- Signal behavior: when parking aid is active, expect pulsed drive and a return echo signal or valid data on sensor line/module
- Data bus: parking aid module will report sensor status over vehicle CAN/LIN — check for valid messages with scanner
Diagnostic algorithm
- Connect a capable diagnostic scanner, read B1443 and any related codes, note freeze frame/cycle count.
- Visually inspect the left rear sensor, mount, and wiring for obvious damage, contamination, or misalignment. Clean if necessary.
- With ignition on, probe the sensor connector: verify battery supply voltage on the power pin(s) and good ground continuity to chassis.
- If supply/ground are good, activate parking aid and measure for expected pulsed drive signal or echo on the signal pin using an oscilloscope or lab scope if available.
- Wiggle-test the harness and connector while monitoring voltage/signals to look for intermittent faults.
- If wiring or connector shows faults (open/short/corrosion), repair wiring or replace the connector and retest.
- If wiring and supply are good but the sensor shows no valid signal or abnormal return, swap the suspect sensor with a known-good sensor (if available) or temporarily fit a replacement to confirm sensor failure.
- If a replacement sensor functions correctly, replace the faulty sensor and clear codes; confirm proper operation of the parking aid.
- If swapping sensors does not clear the fault and signals to the sensor are correct, inspect/diagnose the parking aid control module and CAN/LIN communications; consider module replacement only after confirming harness and sensor integrity.
- After repairs, clear DTCs and perform a system test in both reverse and parking aid test modes to confirm the fault is resolved.
Likely causes
- Corroded/damaged sensor connector or wiring at rear bumper
- Failed sensor element due to water ingress or impact
- Intermittent ground or low supply voltage at the sensor
- Faulty parking aid control module (less likely than wiring/sensor)
Fault status
Status
Left rear parking assistance side sensor fault — circuit or signal invalid (open/short/communication error).
Repair difficulty: Medium
Diagnostic time: 0.5-2.0 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
B1443
MITSUBISHI
B — Body
FR curtain ABG squib SHT.to BAT
Views:
UK: 6
EN: 8
RU: 5
AI status
Completed
Completed
100%
Causes
- Faulty left rear side parking sensor (failed transducer or internal electronics)
- Damaged connector, corroded pins, or poor connection at the sensor
- Wire harness damage (open, short to ground or battery, chafing)
- Poor ground or supply voltage to the sensor
- Water ingress or contamination of sensor or connector
- Fault in parking aid control module or related CAN/LIN bus communication
Symptoms
- Rear parking aid warning displayed on dash or message centre
- Left rear side sensor not detecting objects or giving false detections
- Parksense/parking aid disabled or partial system operation
- Audible warning chime or continuous beeping in reverse
- Stored DTC B1443 in module memory
What to check
- Read and record all stored codes and freeze/frame data with a diagnostic scanner
- Inspect left rear sensor and surrounding bumper area for physical damage
- Visually inspect sensor connector for corrosion, bent pins, or water
- Check harness along bumper for damage, pinches, or abrasion
- Verify battery voltage and chassis/engine ground condition
- Confirm if fault is permanent or intermittent by cycling ignition and activating parking aid
Signal parameters
- Sensor supply voltage: approx. vehicle battery voltage (about 11–14 V) when key on/engine running
- Sensor ground: near 0 Ω to chassis (verify continuity)
- Ultrasonic transducer frequency: typical ultrasonic parking sensors operate near ~40 kHz (module-driven pulses)
- Signal behavior: when parking aid is active, expect pulsed drive and a return echo signal or valid data on sensor line/module
- Data bus: parking aid module will report sensor status over vehicle CAN/LIN — check for valid messages with scanner
Diagnostic algorithm
- Connect a capable diagnostic scanner, read B1443 and any related codes, note freeze frame/cycle count.
- Visually inspect the left rear sensor, mount, and wiring for obvious damage, contamination, or misalignment. Clean if necessary.
- With ignition on, probe the sensor connector: verify battery supply voltage on the power pin(s) and good ground continuity to chassis.
- If supply/ground are good, activate parking aid and measure for expected pulsed drive signal or echo on the signal pin using an oscilloscope or lab scope if available.
- Wiggle-test the harness and connector while monitoring voltage/signals to look for intermittent faults.
- If wiring or connector shows faults (open/short/corrosion), repair wiring or replace the connector and retest.
- If wiring and supply are good but the sensor shows no valid signal or abnormal return, swap the suspect sensor with a known-good sensor (if available) or temporarily fit a replacement to confirm sensor failure.
- If a replacement sensor functions correctly, replace the faulty sensor and clear codes; confirm proper operation of the parking aid.
- If swapping sensors does not clear the fault and signals to the sensor are correct, inspect/diagnose the parking aid control module and CAN/LIN communications; consider module replacement only after confirming harness and sensor integrity.
- After repairs, clear DTCs and perform a system test in both reverse and parking aid test modes to confirm the fault is resolved.
Likely causes
- Corroded/damaged sensor connector or wiring at rear bumper
- Failed sensor element due to water ingress or impact
- Intermittent ground or low supply voltage at the sensor
- Faulty parking aid control module (less likely than wiring/sensor)
Fault status
Status
Left rear parking assistance side sensor fault — circuit or signal invalid (open/short/communication error).
Repair difficulty: Medium
Diagnostic time: 0.5-2.0 hours
Similar codes
Your experience will help others
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Was this AI description helpful?
Your feedback helps improve AI descriptions.
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0
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Code
B1443
Other
B — Body
Door Handle Switch Circuit Open
Views:
UK: 12
EN: 21
RU: 15
AI status
Completed
Completed
100%
Causes
- Faulty left rear side parking sensor (failed transducer or internal electronics)
- Damaged connector, corroded pins, or poor connection at the sensor
- Wire harness damage (open, short to ground or battery, chafing)
- Poor ground or supply voltage to the sensor
- Water ingress or contamination of sensor or connector
- Fault in parking aid control module or related CAN/LIN bus communication
Symptoms
- Rear parking aid warning displayed on dash or message centre
- Left rear side sensor not detecting objects or giving false detections
- Parksense/parking aid disabled or partial system operation
- Audible warning chime or continuous beeping in reverse
- Stored DTC B1443 in module memory
What to check
- Read and record all stored codes and freeze/frame data with a diagnostic scanner
- Inspect left rear sensor and surrounding bumper area for physical damage
- Visually inspect sensor connector for corrosion, bent pins, or water
- Check harness along bumper for damage, pinches, or abrasion
- Verify battery voltage and chassis/engine ground condition
- Confirm if fault is permanent or intermittent by cycling ignition and activating parking aid
Signal parameters
- Sensor supply voltage: approx. vehicle battery voltage (about 11–14 V) when key on/engine running
- Sensor ground: near 0 Ω to chassis (verify continuity)
- Ultrasonic transducer frequency: typical ultrasonic parking sensors operate near ~40 kHz (module-driven pulses)
- Signal behavior: when parking aid is active, expect pulsed drive and a return echo signal or valid data on sensor line/module
- Data bus: parking aid module will report sensor status over vehicle CAN/LIN — check for valid messages with scanner
Diagnostic algorithm
- Connect a capable diagnostic scanner, read B1443 and any related codes, note freeze frame/cycle count.
- Visually inspect the left rear sensor, mount, and wiring for obvious damage, contamination, or misalignment. Clean if necessary.
- With ignition on, probe the sensor connector: verify battery supply voltage on the power pin(s) and good ground continuity to chassis.
- If supply/ground are good, activate parking aid and measure for expected pulsed drive signal or echo on the signal pin using an oscilloscope or lab scope if available.
- Wiggle-test the harness and connector while monitoring voltage/signals to look for intermittent faults.
- If wiring or connector shows faults (open/short/corrosion), repair wiring or replace the connector and retest.
- If wiring and supply are good but the sensor shows no valid signal or abnormal return, swap the suspect sensor with a known-good sensor (if available) or temporarily fit a replacement to confirm sensor failure.
- If a replacement sensor functions correctly, replace the faulty sensor and clear codes; confirm proper operation of the parking aid.
- If swapping sensors does not clear the fault and signals to the sensor are correct, inspect/diagnose the parking aid control module and CAN/LIN communications; consider module replacement only after confirming harness and sensor integrity.
- After repairs, clear DTCs and perform a system test in both reverse and parking aid test modes to confirm the fault is resolved.
Likely causes
- Corroded/damaged sensor connector or wiring at rear bumper
- Failed sensor element due to water ingress or impact
- Intermittent ground or low supply voltage at the sensor
- Faulty parking aid control module (less likely than wiring/sensor)
Fault status
Status
Left rear parking assistance side sensor fault — circuit or signal invalid (open/short/communication error).
Repair difficulty: Medium
Diagnostic time: 0.5-2.0 hours
Similar codes
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LAND ROVER 3
Land Rover Defender 300Tdi — Workshop Manual (1996 model year)
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Land Rover Defender Workshop Manual Supplement & Body Repair Manual (1999 & 2002 MY)
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