P0517Battery Temperature Sensor Circuit High
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Needs a drive cycle to confirm a fix
- How the car detects it
- 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. P0517 means the signal voltage is above its limit, close to the reference; with an NTC that means very cold, or more often an open circuit – sensor unplugged, wire broken – or a short to positive. The module then assumes a cold battery and may charge too high. No manufacturer document available to us names this code; the description follows CARB's input component rules. A fixed substitute temperature is then used.
- What you may notice
- Possibly check engine light
- Charging voltage too high
- Battery gassing or overcharged
- Likely causes
- LikelySensor unplugged or forgotten after a battery change
- LikelyWire or connector open or corroded
- PossibleSensor open internally
- RareSignal line shorted to positive
- Repair
- Easy · Often possible to do yourself.Typical cost: €20 – €150
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.