Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means there's a problem with the part of the car that checks if the electric motor is safely separated from other parts. It's like if a toy's battery was touching something it shouldn't be.
The code P1AF6 indicates an issue with the sensor that monitors the voltage isolation of Drive Motor 'B'. This sensor ensures that the motor's electrical system is properly isolated from the vehicle's chassis.
P1AF6 is triggered when the Powertrain Control Module (PCM) detects a low voltage signal from the Drive Motor 'B' Voltage Isolation Sensor. This sensor is crucial for maintaining the safety and efficiency of the hybrid or electric vehicle's drive system by ensuring that the motor's electrical circuits are not leaking current to the chassis.
• Check Engine Light is on
• Reduced vehicle performance
• Potential safety risk due to electrical leakage
• Faulty Drive Motor 'B' Voltage Isolation Sensor
• Damaged wiring or connectors in the sensor circuit
• Faulty PCM
PCM: Powertrain Control Module
Voltage Isolation: The separation of electrical circuits to prevent unwanted current flow
• Use an OBD-II scanner to confirm the code.
• Inspect the wiring and connectors for damage or corrosion.
• Test the Drive Motor 'B' Voltage Isolation Sensor for proper operation.
• Replace the faulty Drive Motor 'B' Voltage Isolation Sensor.
• Repair or replace damaged wiring or connectors.
• Reprogram or replace the PCM if necessary.
• OBD-II Scanner
• Multimeter
• Basic hand tools
$200 - $600
Moderate
• Chevrolet Volt
• Nissan Leaf
• Toyota Prius
• Regular maintenance checks
• Ensure proper insulation of electrical components
• Avoid exposure to extreme moisture
Sensor Issue
• Do not drive the vehicle until the issue is resolved.
• Consult with a certified technician for repairs.
Check with your vehicle manufacturer for specific warranty coverage related to the electric drive system.
This code has become more common with the rise of hybrid and electric vehicles, highlighting the importance of electrical isolation in these systems.
High – This issue can pose a safety risk and should be addressed immediately.
Driving with this code active may violate safety regulations and increase the risk of electrical shock.
• Vehicle is in 'Ready' mode
• Drive Motor 'B' is operational
The Drive Motor 'B' Voltage Isolation Sensor is typically located near the drive motor or integrated within the motor control module.
Q: Can I drive with a P1AF6 code?
A: It is not recommended to drive with this code active as it poses a safety risk.
Q: What happens if I ignore this code?
A: Ignoring this code can lead to potential electrical hazards and reduced vehicle performance.
Pro · Four-system diagnostics
A handheld scanner aimed at engine, transmission, ABS, and airbag diagnostic work.
Chassis and ABS faults usually need a scanner that can read brake-system data directly.
View on Amazon
Universal · Torque wrench
Useful when reassembly torque matters for wheel, suspension, and under-hood fasteners.
Useful when wheel, hub, or suspension hardware needs correct reassembly torque.
View on Amazon
Universal · Drive-on ramps
Helpful for safer access underneath the vehicle during exhaust, EVAP, and underbody inspection work.
Helpful for safer access during underbody inspection work.
View on AmazonThese are optional diagnostic tools, not guaranteed fixes. As an Amazon Associate I earn from qualifying purchases.