Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means that the car's computer has detected a problem with one of the wires or sensors that checks the battery voltage in a hybrid or electric vehicle.
The vehicle's control module has identified an issue with the voltage sensing circuit for the hybrid or electric vehicle battery, specifically circuit J.
The P0B68 code is triggered when the Powertrain Control Module (PCM) or Battery Energy Control Module (BECM) detects an abnormal voltage reading from the voltage sense circuit 'J' of the hybrid/EV battery pack. This could be due to a short, open circuit, or a faulty sensor.
• Check Engine Light is on
• Reduced fuel efficiency
• Limited power or performance
• Faulty battery voltage sensor
• Damaged or corroded wiring or connectors
• Faulty Battery Energy Control Module (BECM)
PCM: Powertrain Control Module
BECM: Battery Energy Control Module
• Use an OBD-II scanner to confirm the code.
• Inspect the wiring and connectors for damage or corrosion.
• Test the battery voltage sensor and circuit for proper operation.
• Replace or repair damaged wiring and connectors.
• Replace the faulty battery voltage sensor.
• Replace the Battery Energy Control Module if necessary.
• OBD-II scanner
• Multimeter
• Basic hand tools
$200 - $800
Moderate
• Toyota Prius
• Chevrolet Volt
• Nissan Leaf
• Regular maintenance of battery and electrical systems
• Ensure connectors are clean and secure
• Avoid overcharging the battery
Sensor Issue
• Avoid driving the vehicle until the issue is resolved to prevent further damage.
• Consult with a certified technician for a proper diagnosis.
Check with your vehicle manufacturer for warranty coverage on hybrid/EV components.
This code has become more common as hybrid and electric vehicles have increased in popularity.
Moderate – Addressing this issue promptly can prevent further damage to the vehicle's battery system.
Driving with this code may lead to reduced vehicle performance and should be addressed to ensure safety and compliance with emissions standards.
• Vehicle should be off and parked in a safe location.
• Ensure the battery is fully charged before testing.
The battery voltage sensor is typically located near the battery pack in hybrid or electric vehicles.
Q: Can I drive my car with a P0B68 code?
A: It's not recommended to drive with this code as it may lead to reduced performance and potential damage to the battery system.
Q: How can I prevent this code from appearing?
A: Regular maintenance and ensuring the battery and electrical systems are in good condition can help prevent this code.
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