OBD-II Error Code P0516: How to Fix Battery Temperature Sensor Low

Easy 30-60 minutes Medium Severity Verified June 2026
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Error Code
P0516
Brand
OBD-II Generic
Product Type
automotive
Severity
Medium
DIY Difficulty
Easy
Estimated Fix Time
30-60 minutes
Error P0516 indicates a low voltage condition in the battery temperature sensor circuit. This sensor monitors battery temperature for proper charging. A faulty sensor, wiring issue, or damaged ECU can cause this code. While the vehicle may still run, incorrect charging can affect battery life.
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Tools You'll Need

How to Fix Error Code P0516

  1. Clear the Code and Retest

    Ensure engine is off and key is out before connecting scanner.

  2. Visually Inspect the Battery Temperature Sensor and Wiring

    Disconnect the battery negative terminal before working on electrical components.

  3. Test the Sensor Resistance

  4. Check Voltage at Sensor Connector

    Be careful not to short test leads to ground.

  5. Replace the Battery Temperature Sensor

    Always wear safety glasses when working on the battery.

  6. Clear Code and Verify Repair

Parts You May Need

Battery temperature sensor
Check Price on Amazon
Battery temperature sensor
Check Price on Amazon
Battery temperature sensor
Check Price on Amazon
Battery temperature sensor
Check Price on Amazon
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When to Call a Professional

If you've replaced the sensor and checked wiring but the code returns, the engine control unit (ECU) may be faulty. Professional diagnosis is recommended.

Frequently Asked Questions

Can I drive with error P0516?
Yes, but the battery may not charge correctly, leading to a dead battery or starting issues. It's best to fix it promptly.
What does a battery temperature sensor do?
It measures battery temperature and sends data to the ECU to adjust charging voltage. This optimizes battery life and performance.
Will P0516 cause my check engine light to come on?
Yes, the check engine light will illuminate. The code will be stored in the ECU memory.
How much does it cost to fix P0516?
DIY cost is $15-40 for a new sensor. Professional repair may cost $100-200 including labor.
Is P0516 common on certain cars?
It can occur on any vehicle but is more common in older models where wiring degrades. Check for recalls if applicable.

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