P0AEB

Code

LAND ROVER P — Powertrain

Hybrid battery temperature sensor D - high circuit

Brand: LAND ROVER

Type: P — Powertrain

Views: UK: 17 EN: 28 RU: 18

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Page language: EN

Causes

Open circuit or broken wiring to battery temperature sensor D
Corroded, loose or damaged connector at the sensor or control module
Failed temperature sensor (thermistor) on the high-voltage battery pack
Water ingress or contamination at connector or sensor
Short to vehicle battery positive (pull-up) or other voltage source
Faulty battery management control module (BMC) or hybrid control module

Symptoms

Malfunction Indicator Lamp (MIL) illuminated
Reduced hybrid system performance or limited power mode
Reduced regen or charge capability from the battery
Incorrect battery pack temperature readings in scan tool data
Possible thermal management faults (fan/heater behavior irregular)
Possible inability to start hybrid system or charge high-voltage battery

What to check

Read freeze frame and live data with a capable scan tool; confirm sensor D reported voltage/resistance and compare to other battery temp sensors
Visually inspect the sensor D connector and wiring for damage, corrosion, chafing or water ingress
Verify high-voltage system is de-energized and follow manufacturer safety procedures before touching battery pack components
Check continuity and resistance of the sensor circuit (pin-to-pin) back to the battery management module
Confirm connector pins are straight, seated and have good contact; wiggle test for intermittent faults
Check for related codes for other battery temperature sensors or BMC communications faults

Signal parameters

Sensor type: usually NTC thermistor (resistance decreases as temperature increases)
Nominal signal: typically a voltage measured at the BMC input within a 0–5 V range (vehicle-specific)
High-circuit symptom: voltage near supply (pull-up) or open-circuit reported by controller
Resistance behavior: open circuit or very high resistance when the circuit is 'high'
Compare with other battery temp sensor channels to identify inconsistency

Diagnostic algorithm

Retrieve DTC, freeze frame and live data for all battery temperature sensors using a manufacturer-capable scan tool.
Confirm the code is current (not historic). Note reported voltage/resistance for sensor D and compare to other sensors and expected ranges.
Visually inspect the sensor D harness and connector for damage, corrosion, pin deformation, moisture or evidence of repairs.
De-energize the high-voltage system per manufacturer procedure and isolate the battery before performing resistance/continuity tests.
With HV system disabled and battery isolated, measure continuity between the sensor D connector and the battery management module connector; check for opens, shorts to supply, and shorts to ground.
Measure the sensor element resistance at the sensor (if accessible) and compare to expected NTC values at ambient temperature; replace sensor if open/high resistance.
If wiring and sensor check good, re-energize system and monitor live voltage/sensor feed while backprobing at the module connector (observe HV safety protocols). Look for pull-up voltage or intermittent signals.
Check connectors for water/dirt; clean or replace as needed and apply dielectric grease if recommended by manufacturer.
If wiring and sensor are good but module input still reads high, inspect/replace the battery management module or have module bench-tested by qualified technician.
Clear codes and perform test drive/operation; verify code does not return and that thermal management and hybrid system behavior return to normal.

Likely causes

Open or high-resistance wiring between sensor D and battery management module
Damaged sensor element (thermistor) - open or out-of-range resistance
Connector corrosion or bent pins causing loss of continuity
Water/dirt causing intermittent high readings
Faulty module input or internal pull-up resistor failure (less common)

Fault status

⚠️ Status

Hybrid battery temperature sensor D — high circuit (open or high-resistance). Battery management controller detects out-of-range/high voltage from sensor D; may cause reduced hybrid operation or thermal management faults.

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 1.0-3.0 hours

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P0AEB — Hybrid battery temperature sensor D - high circuit