Powertrain, generic · Vehicle speed, idle control and auxiliary inputs

P0514 Battery Temperature Sensor Circuit Range/Performance

Check engine lightOn
EmissionsNot relevant
Drive cycleRequired
Limp modeNo

The battery temperature sensor – usually an NTC in the battery tray or inside an intelligent battery sensor on the negative terminal – lets the module adjust the charging voltage (higher when cold, lower when warm) and supports battery management and start-stop. P0514 is the plausibility check of the temperature signal. On FCA/Alfa Romeo the temperature comes from the intelligent battery sensor on the negative terminal; P0514 means its value is implausible, and several cases on the Alfa Giulia 2.0 were fixed by engine module software. A fixed substitute temperature is then used; CARB requires plausibility faults to have their own code.

Likely causes

Engine module software (false trigger)
Battery sensor or NTC drifting
Corrosion at sensor or connector near the battery acid
Sensor fitted wrongly after a battery change

Symptoms

  • Possibly check engine light
  • Charging voltage too high or too low
  • Start-stop not working

Repair estimate

DifficultyEasyDIY possible
Parts and labour€0–250
Time0.3–1 h

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

Parts involved

battery temperature sensorsensor wiringengine control module

Related codes

P0515P0516P0517P0562P0563

References: static.nhtsa.gov, static.nhtsa.gov, law.cornell.edu.