AutoCodesToyota – P0516 Toyota

P0516 Toyota Code - Battery Temperature Sensor Circuit Low

Quick Answer

The battery temperature sensor built into the generator control ECU assembly detects the battery temperature. Common causes include Faulty Battery Temperature Sensor (Built into the Generator control ECU assembly), Battery Temperature Sensor harness is open or shorted, Battery Temperature Sensor circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means
P0516 Toyota indicates Battery Temperature Sensor Circuit Low.
Common causes
Common causes include Faulty Battery Temperature Sensor (Built into the Generator control ECU assembly), Battery Temperature Sensor harness is open or shorted, Battery Temperature Sensor circuit poor electrical connection.
Severity
High - diagnose this code as soon as possible.
Can I drive?
Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
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Code Popularity 9,984
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Apr 06, 2024
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Code P0516 Toyota Description

The battery temperature sensor built into the generator control ECU assembly detects the battery temperature. A thermistor is integrated into the battery temperature sensor, and the resistance of the thermistor changes according to the battery temperature. The resistance of the thermistor increases as the battery temperature decreases and decreases as the temperature increases. The generator control ECU assembly reduces the amount of charging current based on this signal in order to protect the battery. The Diagnostic Trouble Code (DTC) will be set when the battery temperature sensor output value is abnormally low for 0.5 seconds or more with the ignition switch ON.
OBDII Code P0516 Toyota - Battery Temperature Sensor Circuit Low - AutoCodes.com
P0516 Toyota Code - Battery Temperature Sensor Circuit Low

What are the Possible Causes of the DTC P0516 Toyota?

  • Faulty Battery Temperature Sensor (Built into the Generator control ECU assembly)
  • Battery Temperature Sensor harness is open or shorted
  • Battery Temperature Sensor circuit poor electrical connection

How to Fix the DTC P0516 Toyota?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0516 Toyota code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

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Information for Specific Toyota Models

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P0516 Toyota Code

1. What does the OBDII code P0516 mean on a Toyota?

P0516 indicates a "Battery Temperature Sensor Circuit Low," meaning the vehicle's computer has detected an abnormally low voltage signal from the battery temperature sensor.

2. What are the common symptoms of code P0516 in a Toyota?

Symptoms may include an illuminated check engine light, erratic charging behavior, difficulty starting the vehicle, or unusual battery performance.

3. What causes the P0516 code to appear?

Common causes include a faulty battery temperature sensor, damaged wiring or connectors, a malfunctioning alternator, or issues with the vehicle’s PCM (Powertrain Control Module).

4. Can I drive my Toyota with a P0516 code?

While the vehicle may remain drivable, ignoring the code can lead to battery charging issues or further electrical system damage, so it’s best to diagnose and repair it promptly.

5. How is the P0516 code diagnosed?

Technicians use a scan tool to confirm the code, inspect the battery temperature sensor and its wiring, and test for proper voltage and resistance in the circuit.

6. How do I fix the P0516 code on my Toyota?

Repairs may involve replacing the battery temperature sensor, repairing damaged wiring or connectors, or updating/replacing the PCM if necessary.

7. Can a dead battery trigger the P0516 code?

A dead or failing battery is unlikely to directly trigger the code but could exacerbate related electrical issues, making it important to test the battery's health.

8. Where is the battery temperature sensor located on a Toyota?

The sensor is typically located near or on the battery itself, often integrated into the battery tray or mounting area.

9. How much does it cost to fix the P0516 code?

Repair costs vary but may range from $50 to $200, depending on whether only the sensor needs replacement or if additional repairs (e.g., wiring) are required.

10. Can a P0516 code clear itself after repairs?

After fixing the underlying issue, the code may clear on its own after several drive cycles, or it can be cleared manually using an OBDII scan tool.

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