Powertrain, generic · Hybrid propulsion

P0DF4 Generator Inverter Temperature Sensor B Circuit Range/Performance

Check engine lightOn

EmissionsRelevant

Drive cycleRequired

Limp modePossible

P0DF4 reports that temperature sensor B of the generator inverter delivers an electrically valid signal whose value does not fit the other sensors. Mitsubishi documents the check for the Outlander PHEV: a single time in each drive cycle, following at least 600 s of standstill and with the IGBTs switched off, the V-phase high-side sensor may not differ by more than 47 °C from the other two phase sensors for 0.1 s; otherwise P0DF4-00 is stored and the power drive unit is replaced. Volvo lists ECM P0DF400 for 2022-on T8 plug-in hybrids and warns it can be misdetected, showing Propulsion System Service Required; for builds from week 202147 to 202446 ECM software 3.4.4 cures it. Out-of-range signals are P0DF5 and P0DF6.

Likely causes

Control software misdetection (Volvo T8, ECM update available)

Sensor in the power module drifted or stuck at one value

Internal fault in the power drive unit (Mitsubishi replaces the unit)

Symptoms

Message such as Propulsion System Service Required
Engine warning light on
Turtle symbol and reduced power in some cases

Repair estimate

DifficultyShop_onlyWorkshop job

Parts and labour€80–4,500

Time0.5–5 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

generator inverter temp sensor bwiring harnesshybrid control module

References: mitsubishitechinfo.com, static.nhtsa.gov, static.nhtsa.gov, mitsubishitechinfo.com.