B1443

Code

LAND ROVER B — Body

left rear parking assistance side sensor

Brand: LAND ROVER

Type: B — Body

Views: UK: 19 EN: 24 RU: 19

AI status

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Page language: EN

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

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Manual library for LAND ROVER

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Browse 413 LAND ROVER manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.

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