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Home / DTC / P0A2A — Drive motor A - sensor circuit temperature

P0A2A — Drive motor A - sensor circuit temperature

Detailed page for trouble code P0A2A.

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P0A2A

LAND ROVER P — Powertrain

Drive motor A - sensor circuit temperature

Brand: LAND ROVER
Type: P — Powertrain
AI status
Completed
ready
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Page language: EN

Causes

  • Open or short in temperature sensor wiring (to ground or battery voltage)
  • Corroded, loose or damaged sensor connector(s)
  • Failed temperature sensor (thermistor/RTD) inside the drive motor
  • Drive motor controller (inverter) internal fault or bad reference/ground
  • Moisture/water ingress or contamination at sensor or connector
  • Incorrect service, retrofit, or connector pinned incorrectly

Symptoms

  • Malfunction indicator lamp (MIL) / warning lamp on
  • Reduced drive performance or torque limitation (limp mode)
  • Loss of regenerative braking or limited charging behaviour
  • Drive motor overtemperature warning (false or real)
  • Stored freeze-frame data and related EV drive DTCs

What to check

  • Scan for P0A2A and any related DTCs; record freeze-frame and live-data values
  • Ensure vehicle is powered down and high-voltage system isolated per manufacturer procedures before inspecting harness/connector
  • Visually inspect the motor sensor connector and harness for damage, corrosion, water ingress, or pin deformation
  • Check continuity and insulation of sensor wiring (resistance and shorts to ground / battery voltage) between sensor connector and motor controller
  • Measure sensor signal and reference voltages at the connector with ignition states per service manual (use insulated probes suitable for HV where required)
  • Compare sensor resistance vs. temperature (ambient) to service specifications or heat/cool sensor to verify thermistor/RTD behavior

Signal parameters

  • Sensor type: typically a temperature sensing element (NTC thermistor or RTD) mounted to the motor housing or windings
  • Expected behavior: thermistor resistance normally decreases as temperature increases (RTDs increase); verify type in service data
  • Signal interface: commonly a low-voltage sensor input to inverter (voltage divider or ADC); nominal signal levels typically within 0–5 V depending on design
  • Practical ranges: depending on sensor type the resistance at ambient can be in the low ohm to kilo-ohm range; consult Land Rover service data for exact values
  • Fault signatures: open-circuit (very high resistance), short-to-ground or short-to-Vb (near 0 Ω), or steady out-of-range voltage/ADC value

Diagnostic algorithm

  1. Retrieve DTCs and freeze-frame; note whether code is current or historic and if other EV subsystem codes are present.
  2. Follow manufacturer high-voltage safety procedures: disable HV system and wait for capacitors to discharge before any connector/harness work.
  3. Visually inspect sensor connector and harness for obvious damage, pin corrosion, water or separation from motor ingress points.
  4. With HV isolated, unplug sensor connector (if accessible) and check pin condition. Measure sensor element resistance at the connector; compare to service spec or check for open/short.
  5. If sensor resistance is within spec, reconnect and backprobe the sensor signal/reference with the system energized (follow safety rules). Verify reference voltage and signal behaviour at ambient and when warming/cooling the sensor (heat gun or ice) to confirm proper change.
  6. Perform continuity and insulation tests on the harness between the sensor connector and motor controller; check for short to ground or supply.
  7. Wiggle the harness/connector while monitoring live data to identify intermittent harness faults.
  8. If wiring and sensor check out, scan inverter/drive controller internal diagnostics and check for software updates or calibrations. Consider controller replacement or repair only after confirming sensor and harness integrity.
  9. After any repair or replacement, clear codes and road/test to confirm fault does not return and monitor live temperature values.
  10. If uncertain or if HV system repair is required, refer to Land Rover service procedures or escalate to qualified high-voltage technician.

Likely causes

  • Damaged/contaminated connector at motor temperature sensor
  • Broken/chafed sensor harness between motor and inverter
  • Failed temperature sensor element (open/short or out-of-spec resistance)
  • Intermittent connection due to corrosion or vibration
  • Faulty motor controller temperature input (less common)

Fault status

⚠️ Status
Drive Motor A temperature sensor circuit fault detected — signal out-of-range/open/short. Inspect sensor, connector, harness and motor controller inputs.
🔴 Repair difficulty: Hard
⏱️ Diagnostic time: 2-6 hours

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P0A2B P0A2C P0115 P0118 P0A80
413

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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