AutoCodes – Generic – B1516:66

B1516:66 Code - Battery Current Sensor Incorrect Mounting

Quick Answer

The Battery Current Sensor is a 3-wire hall effect current sensor. Common causes include Faulty Battery Current Sensor, Battery Current Sensor harness is open or shorted, Battery Current 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: B1516:66 indicates Battery Current Sensor Incorrect Mounting.
Common causes: Common causes include Faulty Battery Current Sensor, Battery Current Sensor harness is open or shorted, Battery Current 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 3,207

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Apr 20, 2023

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
Comments
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Code B1516:66 Description

The Battery Current Sensor is a 3-wire hall effect current sensor. The Body Control Module (BCM) supplies 5 V and ground to the battery current sensor. The battery current sensor measures the amount of current flowing to or from the battery, and supplies a Pulse Width Modulation (PWM) signal to the BCM. The Diagnostic Trouble Code (DTC) will be set when the battery current polarity is positive for 2 min.

OBDII Code B1516:66 - Battery Current Sensor Incorrect Mounting - AutoCodes.com — B1516:66 Code - Battery Current Sensor Incorrect Mounting

What does this mean?

What are the Possible Causes of the DTC B1516:66?

Faulty Battery Current Sensor
Battery Current Sensor harness is open or shorted
Battery Current Sensor circuit poor electrical connection
Faulty Body Control Module (BCM)

How to Fix the DTC B1516:66?

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 does this mean?

Code Tech Notes

B1516:08 Battery Current Sensor Signal Invalid
B1516:66 Battery Current Sensor Incorrect Mounting

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B1516:66 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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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.