Powertrain, generic · Hybrid propulsion

P0AEA Hybrid/EV Battery Temperature Sensor D Circuit Low

Check engine lightOn
EmissionsRelevant
Drive cycleRequired
Limp modePossible

P0AEA means the voltage of battery temperature sensor D is below its valid range. GM uses NTC thermistors with a pull-up on the sensing board, so a low voltage reads as an extremely hot cell, usually from a short to ground. Thresholds vary: above 160 °C in 8 of 10 samples in the 2016 and 2019 tables; above 95 °C in 30 of 40 on the 2011 and 2013 two-mode hybrids; below 0.3 V, about 90 °C, in 7 of 10 in the eAssist table 13OBDG05C; above 87.5 °C for 1.4 s within 2 s in a 2018 controller. All are Type B, two trips. Volt bulletin 18-NA-342 lists P0AEA among codes that can set falsely and calls for a software update first. A genuinely hot pack would trip lower limits earlier, so treat it as electrical.

Likely causes

Sensor D signal wire shorted to ground
Temperature sensor D internally shorted
Outdated controller software (GM Volt, bulletin 18-NA-342)
Moisture or damage on the battery sensing board

Symptoms

  • Malfunction indicator lamp after two trips
  • Charge and drive power strongly limited
  • Battery cooling running more than usual

Repair estimate

DifficultyShop_onlyWorkshop job
Parts and labour€60–2,500
Time0.5–5 h

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

Parts involved

hv battery temp sensor dwiring harnessbms

Related codes

P0AEBP0AE8P0AE9P0AECP0ACC

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