P0514
Battery Temperature Sensor Circuit Range or Performance
The battery temperature sensor reports a value within plausible range yet inconsistent with engine bay or coolant temperature. Modern alternator regulation uses battery temperature to adjust charging voltage, so an offset here causes over- or undercharging.
- Check engine light: Yes
- Emissions related: No
- Repair difficulty: easy
Symptoms
- EV/hybrid system warning light on
- Reduced power output or limp mode
- Charging may fail or be slowed
- Reduced electric range
Common causes
Ordered by how often each turns out to be the cause.
- Sensor element driftedCommon
Parts involved
- Battery Temperature Sensor
P0514 is a generic OBD-II code defined by SAE J2012. Exact wording and diagnostic procedure vary by manufacturer and model. Code definitions are drawn from the public-domain OBDex dataset; the workshop notes are our own.