Powertrain, generic · Hybrid propulsion

P0CB3 Hybrid/EV Battery Temperature Sensor O Circuit Range/Performance

Check engine lightOn
EmissionsRelevant
Drive cycleRequired
Limp modePossible

P0CB3 is a plausibility code: sensor O delivers an electrically valid reading, yet it strays too far from the rest of the pack. In GM's 2012 Volt table 12OBDG01A the check waits until propulsion, plug-in charging and battery thermal conditioning have all been off for more than 21,600 s; a gap above 25.3 °C to the average in 50 of 67 samples then counts as a Type B failure. The HPC2 tables 18OBDG02 and 19OBDG02 use 25.00 °C, sample every 25 ms and pause while sensor circuit faults or a communication loss with the battery electronics are present. Mitsubishi assigns P0CB3 to module sensor [14] of the Outlander PHEV and fails it at a deviation of 13 °C or more held for 0.32 s, after a soak above 3,600 s and with the pack between −30 and 60 °C.

Likely causes

Thermistor O drifting while its voltage stays in range
Sensor O no longer seated firmly against its module
Module section really warmer or colder, e.g. weak cell or uneven cooling

Symptoms

  • Warning lamp typically appearing after the car has stood for hours
  • Battery power limited

Repair estimate

DifficultyShop_onlyWorkshop job
Parts and labour€80–2,500
Time0.5–5 h

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

Parts involved

hv battery temp sensor owiring harnessbms

Related codes

P0CB2P0CB4P0CB5P0CB6P0CAEP0CB8

References: gsi.ext.gm.com, gsi.ext.gm.com, mitsubishitechinfo.com, mitsubishitechinfo.com.