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2003 TOYOTA TACOMA
2.7L I4•RWD•AUTOMATIC•gas•3RZ-FE
5 active safety recalls on this vehicle — view recalls
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Repairs0Labor1066Torque2197Fluid17DTC3480Battery2Maintenance0Recalls5
P0516low severityPowertrain

Battery Temperature Sensor Circuit Low

on 2003 Toyota Tacoma 2.7L I4 · RWD

What this code means

The battery temperature sensor circuit reads lower voltage than expected. This may cause the charging system to misjudge battery temperature.

Symptoms

  • Check engine light on
  • Charging irregularities
  • Battery warnings

Common causes

  • Short to ground in sensor wiring
  • Faulty battery temperature sensor
  • Corroded connector
  • Faulty PCM input circuit

Diagnostic steps

  1. Scan battery temp sensor voltage
  2. Inspect wiring for short to ground
  3. Test sensor resistance
  4. Check connector for corrosion
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