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Home / DTC / P0E2B — Drive Motor Inverter Temperature Sensor H Circuit High

P0E2B — Drive Motor Inverter Temperature Sensor H Circuit High

Detailed page for trouble code P0E2B.

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P0E2B

Generic P — Powertrain

Drive Motor Inverter Temperature Sensor H Circuit High

Brand: Generic
Type: P — Powertrain
Views: UK: 13 EN: 16 RU: 10
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Page language: EN

Causes

  • Open or high-resistance wiring between inverter and control module
  • Connector corrosion, damage, or poor pin contact at sensor or inverter
  • Sensor element failure (open circuit or out-of-spec)
  • Short to battery positive or another voltage source on the sensor circuit
  • Inverter control module/internal connector fault or damage
  • Aftermarket modifications, water ingress, or physical damage to inverter harness

Symptoms

  • Hybrid/EV warning lamp or inverter warning illumination
  • Reduced drive power, limp-home or reduced functionality mode
  • Inverter temperature reading abnormal or out-of-range in scan tool
  • Possible unexpected inverter shutdown or derate
  • No obvious external electrical symptoms (if fault is internal to inverter)

What to check

  • Record freeze frame and permanent/fault data with a scanner; note reported inverter temperature and raw sensor voltage
  • Visually inspect inverter service area, sensor connector, and wiring for damage, corrosion, water intrusion, or pinch points
  • Verify HV safety procedures before any work: remove service plug/enable service mode and follow manufacturer high-voltage isolation steps
  • With vehicle safe and low-voltage systems powered per service manual, backprobe sensor connector and measure signal voltage with ignition on (or as specified) and compare to expected range
  • Check sensor circuit continuity and resistance to known good reference (ignition off, battery disconnected) and watch for open circuit or short to battery + or ground
  • Swap/compare readings with a matching known-good sensor or harness connector if available (or inspect for other stored inverter sensor codes)

Signal parameters

  • Typical thermistor signal voltage range: ~0.1 V to ~4.9 V (varies by manufacturer)
  • Circuit High indication: sensor signal voltage above upper threshold (example >4.5 V) or open/infinite resistance
  • Expected ambient sensor resistance at 25°C: manufacturer-specific (example 10 kΩ NTC — reference only)
  • Expected temperature reading with healthy sensor at ambient: within normal ambient +/− tolerance (example 20–40°C)
  • If signal high, scan tool may show an implausibly low or high temperature (or a specific 'sensor open' indicator depending on ECU calibration)

Diagnostic algorithm

  1. Retrieve freeze frame and permanent codes. Note whether code is active or historical and any related inverter/hybrid DTCs.
  2. Review manufacturer service information for the inverter temperature sensor pinout, expected voltages/resistances, and safety interlocks.
  3. Perform a visual inspection of harness, connector, and inverter for damage, water, or contamination. Repair obvious issues.
  4. Put vehicle into required service mode and isolate high-voltage system following the service manual before any HV component access.
  5. With appropriate safety measures, backprobe the sensor signal and ground reference. With ignition/vehicle in the state required by the manual, record the sensor signal voltage. A voltage above the specified upper limit indicates Circuit High.
  6. With ignition off and low-voltage battery disconnected (or following manual), measure resistance of the sensor circuit from connector to inverter ground and from signal to battery positive to check for opens or shorts.
  7. Wiggle test the harness and connector while monitoring live data or signal voltage to find intermittent open/shorts.
  8. If wiring and connectors are good, replace the inverter temperature sensor assembly per manufacturer instructions, or if sensor is internal to the inverter, consider inverter replacement or factory repair.
  9. After repair, clear codes and road/test to confirm the DTC does not return and that inverter temperature readings are normal.
  10. If fault persists and wiring is confirmed good, suspect inverter control module hardware fault — contact manufacturer or authorized repair facility for module-level diagnostics or replacement.

Likely causes

  • Disconnected or loose sensor connector at the inverter
  • Broken wire in harness (chafe point) causing intermittent open
  • Failed thermistor inside inverter assembly
  • Shorted harness to a constant voltage source (rare)
  • Inverter internal PCB/connector fault

Fault status

⚠️ Status
Drive Motor Inverter Temperature Sensor H Circuit High — controller detected sensor circuit voltage above allowed range (possible open circuit or short to voltage) affecting inverter temperature sensing. May cause inverter derate or fault lights.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.0-3.0 hours

Similar codes

P0E2A P0E2C P0E2D P0A7F
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