B13B5

Code

LAND ROVER B — Body

rear central sensor

Brand: LAND ROVER

Type: B — Body

Views: UK: 14 EN: 24 RU: 17

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Page language: EN

Causes

Damaged or faulty rear central ultrasonic/parking sensor
Open/short/corroded wiring or damaged connector at the sensor
Water ingress or contamination of sensor or connector
Loose or damaged sensor mounting (mechanical impact)
Body control module (BCM) or parking aid module software/firmware issue
Intermittent connection or pin corrosion at wiring harness

Symptoms

Parking assist / parking aid message or warning lamp on instrument cluster
’Rear central sensor’ (or similar) fault message displayed on infotainment or driver information
Rear parking sensors partially or completely inoperative (no beeps or incorrect distance)
False beeps or constant beeping from rear sensors
Reduced functionality of automatic parking or Park Assist features

What to check

Read stored and pending DTCs with an OEM-capable scan tool; record freeze-frame/live data
Visually inspect rear central sensor, mounting and surrounding lens for damage or contamination
Inspect sensor connector for corrosion, bent pins, moisture or loose fit
Check wiring harness along route for chafing, pinch points, or previous repair areas
Check for related network/communication codes (U-codes) in BCM or parking aid module
With key on, measure supply voltage at sensor connector (back-probe) and check ground continuity

Signal parameters

Connector supply voltage (Key ON): approximately battery voltage range (typically 11–14 V)
Ground continuity to chassis ground expected (low resistance)
Sensor output: pulsed/echo response — ultrasonic sensors emit pulses and return echo amplitude/interval (not a steady DC voltage)
Live-data items: distance or echo strength values, sensor status flags (OK/FAULT/NOISE)
For communication faults, check CAN/LIN bus status and module messages for loss of comm

Diagnostic algorithm

Verify DTC B13B5 with a scan tool; note related codes and live-data channels.
Visually inspect the rear central sensor and lens; clean off dirt/ice and recheck operation.
Inspect and back-probe the sensor connector: confirm battery voltage at supply pin with key ON and good ground continuity.
Use scan tool live data and an assistant to move an object behind the central sensor to confirm it produces distance/echo changes.
Perform a wiggle test of the harness and connector while watching live data/DTCs to locate intermittent wiring faults.
If supply/ground good but no signal, disconnect sensor and measure wiring for short to power/ground and continuity to module connector.
If wiring and connector are confirmed good, swap the suspected central sensor with a known-good sensor (if available) or replace the sensor and retest.
If replacing sensor does not clear fault, inspect/replace/ reflash the parking aid or body control module and check for network communication issues.
Clear codes after repair and re-check system operation under real conditions; perform any required calibration/teach-in procedures per manufacturer.
If intermittent after repair, consider harness replacement or routing changes to eliminate future chafing or water exposure.

Likely causes

Corroded connector or wiring at the rear central sensor (most common)
Sensor element failed due to impact or water ingress
Intermittent harness damage (chafing, broken conductor)
Fault in parking aid / body control module or lost communication

Fault status

⚠️ Status

Rear central sensor fault (B13B5) — rear parking sensor may be inoperative. Service recommended.

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 0.5 - 2.0 hours

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