P0516Battery Temperature Sensor Circuit Low
- 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. P0516 means the signal voltage stays below its limit for a minimum time; with an NTC in a voltage divider a low voltage means very hot, or more often a signal line shorted to ground or an internal short. The module then assumes a hot battery and may charge too little. 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 low
- Battery weak, starting problems in the cold
- Likely causes
- LikelySignal line shorted to ground (chafed at the battery tray)
- PossibleSensor shorted internally
- PossibleMoisture or acid in the connector
- RareModule
- 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.