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Home / DTC / B1454 — Right rear parking assist sensor

B1454 — Right rear parking assist sensor

Detailed page for trouble code B1454.

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B1454

LAND ROVER B — Body

Right rear parking assist sensor

Brand: LAND ROVER
Type: B — Body
AI status
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Page language: EN

Causes

  • Failed/defective right rear parking assist ultrasonic sensor
  • Corroded/damaged connector or wiring harness to the right rear sensor
  • Open, short or intermittent wiring (power, ground or signal)
  • Water ingress/contamination in sensor or connector
  • Sensor mechanically damaged or misaligned due to bumper damage
  • Faulty parking assist control module or related ECU software/configuration error

Symptoms

  • Rear parking aid warning or message on dash/infotainment
  • Right rear sensor not detecting objects (no beep/indicator) or constant alarm tone
  • Reduced accuracy or missing distance readings for right rear quadrant
  • Inconsistent or intermittent parking aid operation
  • Possible stored diagnostic trouble code(s) and disabled parking assist function

What to check

  • Read stored DTCs and freeze frame data with a Land Rover-capable scan tool
  • Visually inspect right rear bumper area and sensor for damage, debris or misalignment
  • Check sensor face for dirt/ice/obstruction and clean before testing
  • Inspect connector and pins for corrosion, bent pins, moisture or pushed-out terminals
  • Backprobe connector with ignition ON to verify supply voltage and ground presence
  • Use scan tool to perform an active test (exercise the right rear sensor) and observe live data (distance or status)

Signal parameters

  • Supply voltage: vehicle battery/ignition-switched supply present at sensor connector (nominal ~12 V with key on)
  • Ground: good continuity from sensor ground to chassis/vehicle ground
  • Sensor signaling: ultrasonic sensors are pulsed/triggered by the control module and return timing/frequency or a digital status — live-data should show distance or a valid ‘active’ state when probed with a dealer scan tool
  • When inactive, sensor signal lines typically rest near 0 V; during diagnostics you may see short duration pulses or encoded data on the signal line — use an oscilloscope or capable scan tool for waveform check
  • CAN/Module data: ECU should report a valid distance (cm) or ‘OK’ status for the right rear sensor when functioning

Diagnostic algorithm

  1. Connect an appropriate diagnostic scan tool and read all stored codes and freeze frame; note any related codes and system messages.
  2. Visually inspect the right rear sensor, sensor face and surrounding bumper area for damage, foreign material, ice, or misalignment; clean sensor surface and retest.
  3. Inspect the sensor connector: disconnect, check pins for corrosion/bending, apply dielectric grease if previously serviceable; reconnect firmly.
  4. With ignition ON, backprobe the connector to verify presence of battery/ignition supply and a good ground. Record voltages. If no supply or ground, trace wiring to fuse/relay/ECU.
  5. Use the scan tool’s component bi-directional test to activate the right rear sensor and observe live data (distance or status). If the scan tool shows no response, suspect sensor or wiring.
  6. Perform a wiggle test on the harness from the sensor to the control module while monitoring live data to find intermittent opens/shorts.
  7. If power/ground present but no valid signal, disconnect sensor and measure resistance where applicable or use an oscilloscope to look for trigger/echo pulses during active testing.
  8. Swap the right rear sensor with another known good sensor (same type/position-compatible) and re-run diagnostics to determine if fault follows the sensor or remains at the location. Do not swap sensors across different sensor types without confirming compatibility.
  9. If wiring and sensor test OK, inspect control module connectors and check for related module codes; consider module reflash or replacement per manufacturer guidance.
  10. After repair or replacement, clear codes, perform relearns/calibrations if required by the manufacturer (some systems require parking sensor calibration), and road-test to verify proper operation.

Likely causes

  • Corroded/contaminated sensor connector or harness (most common)
  • Physical damage to sensor or bumper area (impact or deformation)
  • Intermittent wiring fault where harness rubs/chafes or connector pin is bent
  • Failed sensor element (water ingress or electronics failure)
  • Less likely: control module fault or software calibration issue

Fault status

⚠️ Status
Right rear parking assist sensor fault — sensor not responding / circuit open or short / signal invalid (B1454).
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-1.5 hours

Similar codes

B1450 B1451 B1452 B1453 B1455 B1456
320

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