P0E29: Drive Motor Inverter Temperature Sensor H Circuit Range/Performance

With P0E29 the controller doubts the reading of inverter temperature sensor H although its voltage is valid. On the 2023 Outlander PHEV Mitsubishi uses it for IGBT sensor 8 of the front motor unit, the V-phase H2 position. The cold-start comparison is the same one used for sensors 1 to 7: soak of 600 s or more, IGBTs off, supply at least 8 V, test window of 1.5 s; a difference above 47 °C to either of two reference IGBT temperatures, held for 0.1 s, stores P0E29-00 and lights the MIL and the hybrid warning light. A sensor that is wrong by that much after a cold soak is offset, not overheated. The sibling for the U-phase sensor is P0E24. Mitsubishi verifies it on a test drive before installing a new power drive unit.

Symptoms

• MIL and hybrid warning light on
• Driving usually unaffected

Most likely causes

• Sensor H offset against the other IGBT sensors
• Measuring circuit in the power drive unit faulty
• Uneven cooling of the inverter

What to check, in order

Start with the simplest. You can tick off each step.

1. Read the codes with a hybrid-compatible scanner and write down the freeze frame data
2. Compare the reading with other engine data while varying the engine speed.
3. Make sure the battery cooling air intake is clean
4. Check the 12 V auxiliary battery, which can also trigger warnings
5. Leave any high-voltage measurements to a specialized repair shop

Good to know

• It affects emissions.

What each character of P0E29 means

• P: Powertrain: engine and transmission
• 0: Generic code: same on every make
• E: Subsystem depends on the code range
• 29: Specific fault in that system

Frequently asked questions

Can I keep driving with code P0E29?

If the car still runs, drive as little as possible and go to a specialized repair shop. Do not touch the orange cables: they carry high voltage.

What causes code P0E29?

The most common causes are: sensor H offset against the other IGBT sensors; measuring circuit in the power drive unit faulty; uneven cooling of the inverter.

Related codes

• P0E28Drive Motor Inverter Temperature Sensor H Circuit
• P0E2ADrive Motor Inverter Temperature Sensor H Circuit Low
• P0E2BDrive Motor Inverter Temperature Sensor H Circuit High
• P0E2CDrive Motor Inverter Temperature Sensor H Circuit Intermittent/Erratic
• P0E24Drive Motor Inverter Temperature Sensor G Circuit Range/Performance
• P0AF3Drive Motor Inverter Temperature Sensor B Circuit Range/Performance

Sources

• mitsubishitechinfo.com: N503240300000700USA
• mitsubishitechinfo.com: N503230070000900USA
• law.cornell.edu: 13 CCR 1968.2

Values and procedures vary by manufacturer. If it affects brakes, steering, fuel or high voltage, see a professional. Updated: 2026-11-04. How we build these pages.