P0514
Battery Temperature Sensor Circuit Range/Performance
- Severity
- Medium
- Driving
- Drivable — book it in
The battery temperature sensor is answering, but the temperature it reports is not plausible - it does not change as conditions do, or it disagrees with ambient temperature by more than the module will accept. The sensor is working; it is just not telling the truth, so charging compensation will be wrong.
Possible causes
- CommonFailed or drifting temperature sensor
- CommonSensor dislodged so it no longer contacts the battery
- CommonHigh resistance in the wiring skewing the reading
- PossibleAcid or corrosion damage to the sensor
- PossibleBattery genuinely much hotter than ambient - which is itself a fault
What you might notice
- Battery warning light on
- Charging voltage slightly wrong for conditions
- Shorter battery life
- Check engine light on
What to check, in order
- Compare the reported temperature with ambient on a cold vehicle that has stood overnight.
- Check the sensor is properly seated against the battery. A dislodged sensor reads air temperature rather than battery temperature and produces exactly this.
- Consider whether the battery genuinely is hot. A hot battery on a cool day means it is being overcharged or is failing internally, and that is the more serious finding.
- Check the wiring and connector for high resistance and acid damage.
- Check charging voltage against specification.
Read this code from your own car
Plug an ELM327 adapter into the OBD-II port under the dashboard. Pin16 reads every stored, pending and permanent code, explains each one like this page does — offline, with no account — and shows what the car recorded when the fault was set.
Where this code sits
P00xxP01xxP02xxP03xxP04xxP05xxP06xxP07xxP08xxP09xxP0AxxP0BxxP0CxxP0DxxP0ExxP0FxxP10xxP11xxP12xxP13xxP14xxP15xxP16xxP17xxP18xxP19xxP1AxxP1BxxP1CxxP1DxxP1ExxP1FxxP20xxP21xxP22xxP23xxP24xxP25xxP26xxP27xxP28xxP29xxP2AxxP2BxxP2CxxP2DxxP2ExxP2FxxP30xxP31xxP32xxP33xxP34xxP35xxP36xxP37xxP38xxP39xxP3AxxP3BxxP3CxxP3DxxP3ExxP3Fxx
Vehicle speed control, idle control and auxiliary inputs
P0500P0501P0502P0503P0504P0505P0506P0507P0508P0509P0510P0511P0512P0513P0514P0515P0516P0517P0518P0519P0520P0521P0522P0523P0524P0525P0526P0527P0528P0529P0530P0531P0532P0533P0534P0535P0536P0537P0538P0539P0540P0541P0542P0543P0544P0545P0546P0547P0548P0549P0550P0551P0552P0553P0554P0555P0556P0557P0558P0559P0560P0561P0562P0563P0564P0565P0566P0567P0568P0569P0570P0571P0572P0573P0574P0575P0576P0577P0578P0579P0580P0581P0582P0583P0584P0585P0586P0587P0588P0589P0590P0591P0592P0593P0594P0595P0596P0597P0598P0599