OBD-II code · Powertrain (generic)

P0CAF Hybrid/EV Battery Temperature Sensor N Circuit Low

The HV battery temperature sensor N reports a circuit low fault. Cell-group temperature monitoring impaired on this channel.

Is it safe to drive with P0CAF?

The car may go into limp mode (reduced power). Get it diagnosed before a long trip.

Common causes

Most likelySignal wire shorted to ground
PossibleInternal sensor short
Less likelyConnector pins corroded - high contact resistance

Symptoms

EV/hybrid system warning light on
Reduced power output or limp mode
Charging may fail or be slowed
Reduced electric range

Repair at a glance

Difficulty: Medium
DIY friendly: Best left to a mechanic
Typical labour: 0.5–3 h
Emissions test: Usually unaffected
Parts involved: Hv Battery Temp Sensor N, Wiring Harness, Bms

Related codes

Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.