P0E2B: Drive Motor Inverter Temperature Sensor H Circuit High

What it means

The drive motor inverter temperature sensor H circuit signal is above the expected range.

At a glance

• Usually lights the check-engine light
• The engine or gearbox may go into limp mode

How it works

Inverter temperature sensor H measures temperature at its monitored point in the drive motor inverter. P0E2B sets when the H circuit signal rises above its expected range, which can happen if the signal is shorted to battery positive or the sensor circuit is open.

Common causes

Most likely first.

1. Signal wire shorted to B+
2. Open sensor
3. Connector pins corroded - high contact resistance

Symptoms

• EV/hybrid system warning light on
• Reduced motor power or torque
• Possible limp mode or vehicle shutdown

How to diagnose it

1. Save freeze-frame data and compare sensor H's live reading with other inverter temperatures to confirm whether it is implausibly high or fixed.
2. Power the vehicle down according to its service instructions and inspect sensor H's connector and harness for corrosion, damage, a loose pin, or contact with a power feed.
3. Check the H signal wire for a short to battery positive using the manufacturer's wiring diagram and test procedure.
4. Test the sensor H circuit for an open and check connector pins for high contact resistance.
5. If the circuit and sensor test correctly, check the inverter control module input using the manufacturer's diagnostic procedure.

Common fixes

• Clean and secure corroded or loose sensor H connector pins.
• Repair a signal wire shorted to battery positive or an open in the H circuit.
• Replace sensor H if it tests open or outside the manufacturer's specification.
• Repair the inverter control module input circuit if the sensor and wiring test correctly.

Can I keep driving?

Avoid normal driving if the vehicle has reduced torque or an EV/hybrid warning, as limp mode or shutdown may follow. Stop safely if power drops suddenly and arrange service.