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 electric car's battery system. It's like when a toy car's battery isn't connected properly, so it can't run.
The P1AF2 code indicates that the vehicle's control module has detected a fault in the isolation of the power supply circuit for Drive Motor 'B'.
This code is set when the hybrid or electric vehicle's control module detects an isolation fault in the power supply circuit for Drive Motor 'B'. This could mean that the electrical insulation is compromised, potentially causing a short circuit or improper current flow.
• Warning light on the dashboard
• Reduced vehicle performance
• Inability to start the vehicle
• Damaged wiring or connectors in the power supply circuit
• Faulty drive motor inverter
• Compromised insulation in the battery or motor circuit
Drive Motor: An electric motor used to propel the vehicle.
Inverter: A device that converts DC power from the battery to AC power for the electric motor.
• Check for any stored trouble codes and freeze frame data
• Inspect the wiring and connectors for damage or corrosion
• Test the drive motor inverter for faults
• Repair or replace damaged wiring or connectors
• Replace the drive motor inverter if faulty
• Ensure proper insulation and isolation of the circuit
• OBD-II scanner
• Multimeter
• Insulation resistance tester
$200 - $800
Difficult
• Chevrolet Volt
• Nissan Leaf
• Toyota Prius
• Regularly inspect and maintain the electrical system
• Avoid exposure of electrical components to moisture
• Schedule periodic check-ups for hybrid and electric vehicles
Electrical System Fault
• Do not drive the vehicle until the issue is resolved
• Consult a professional mechanic or dealership
• Consider regular maintenance for hybrid/electric vehicles
Check with your vehicle manufacturer for warranty coverage on hybrid/electric components.
This code has been more common as electric and hybrid vehicles become more prevalent, highlighting the importance of maintaining electrical systems.
High – This issue can affect vehicle performance and safety, and should be addressed promptly.
Driving with this fault can lead to reduced performance and potential safety risks. It is advisable to seek professional repair services.
• Vehicle must be in a safe, stationary position
• Ensure the vehicle is powered off before inspection
The drive motor and its power supply components are typically located near the vehicle's battery pack or electric motor assembly.
Q: Can I drive my car with this code?
A: It is not recommended to drive your vehicle with this code, as it can lead to further damage or safety issues.
Q: How can I prevent this issue in the future?
A: Regular maintenance and inspection of the vehicle's electrical system can help prevent this issue.
High-End · Full-system diagnostics
A full-system bidirectional platform aimed at advanced DIY users and professional diagnostic workflows.
Network faults often require full-system access instead of a generic code reader alone.
View on Amazon
Universal · Digital multimeter
A solid entry-level multimeter for voltage, continuity, resistance, and basic electrical troubleshooting.
Helpful for checking voltage drops, grounds, and basic circuit health when modules are not communicating.
View on Amazon
Universal · Wire connectors and repair kit
Useful when diagnosis points toward damaged wiring, corroded terminals, or connector repairs.
Useful if diagnosis points toward damaged connectors, wiring, or terminal repairs.
View on AmazonThese are optional diagnostic tools, not guaranteed fixes. As an Amazon Associate I earn from qualifying purchases.