Powertrain, generic · Hybrid propulsion

P0CB7 Hybrid/EV Battery Temperature Sensor P Circuit

Check engine lightOn
EmissionsRelevant
Drive cycleRequired
Limp modePossible

P0CB7 covers an electrical fault of battery temperature sensor P that the controller cannot pin down as low, high or intermittent. No manufacturer lists this code on a public official server. In GM's 2011 Volt rationality table P is the sixteenth and last sensor, and GM gives it only P0CB8 to P0CBB; Mitsubishi's Outlander PHEV treats P as module sensor [15] with rationality, short and open codes. In this block P is the final sensor letter, the next code P0CBC already concerns drive motor cooling. CARB requires the battery temperature sensors to be monitored under section (e)(15.2.3)(A)(iv), with circuit faults and range violations to be told apart per (e)(15.2.1). A missing value of P makes the battery controller act cautiously and lower power. Checking means opening the de-energised pack.

Likely causes

Loose or corroded plug of sensor P
Damaged wiring of sensor P inside the pack
Measuring channel for sensor P in the monitoring unit faulty

Symptoms

  • Hybrid or EV warning message
  • Limited electric power 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 pwiring harnessbms

Related codes

P0CB8P0CB9P0CBAP0CBBP0CB2

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