Powertrain, generic · Hybrid propulsion

P0CAD Hybrid/EV Battery Temperature Sensor N Circuit

Check engine lightOn
EmissionsRelevant
Drive cycleRequired
Limp modePossible

P0CAD stands for an electrical problem with battery temperature sensor N that the controller cannot assign to a specific failure type. Public manufacturer documentation for this exact code does not exist. GM's 2011 hybrid rationality list places N fourteenth among sixteen sensors, while its tables from 2012 onward cover N only with the specific codes P0CAE to P0CB1. On the plug-in Outlander, Mitsubishi equates N with module sensor [13] and likewise separates only rationality, short and open. CARB section (e)(15.3.1) is the basis for permanent monitoring of such input circuits. A pack controller without this reading has to plan conservatively for that section. Because the sensor lives inside the traction battery, checks are made only after the high-voltage system has been isolated.

Likely causes

Connector or wire fault between sensor N and the monitoring board
Thermistor N defective
Faulty input channel of the cell monitoring board

Symptoms

  • Hybrid or EV system message
  • Battery power reduced until repaired

Repair estimate

DifficultyShop_onlyWorkshop job
Parts and labour€150–2,500
Time1–5 h

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

Parts involved

hv battery temp sensor nwiring harnessbms

Related codes

P0CAEP0CAFP0CB0P0CB1P0CA8P0CB2

References: law.cornell.edu, gsi.ext.gm.com, mitsubishitechinfo.com.