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 your car that helps control the electric motor. It's like a switch that isn't working right.
The P1AFF code indicates an issue with the inverter that controls the drive motor 'B'. The inverter is responsible for converting electrical energy to drive the motor.
The P1AFF code is triggered when the powertrain control module (PCM) detects a malfunction in the inverter circuit associated with drive motor 'B'. This could be due to a failure in the inverter's ability to switch on or off correctly, which can affect the performance of the drive motor.
• Reduced vehicle performance
• Warning light on the dashboard
• Unusual noises from the motor
• Faulty drive motor 'B' inverter
• Wiring issues in the inverter circuit
• Failed powertrain control module (PCM)
Inverter: A device that converts direct current (DC) to alternating current (AC) to power electric motors.
PCM: Powertrain Control Module, the computer that controls engine and transmission functions.
• Use an OBD-II scanner to confirm the code.
• Inspect the wiring and connectors for damage or corrosion.
• Test the inverter for proper operation.
• Repair or replace damaged wiring or connectors.
• Replace the faulty inverter.
• Reprogram or replace the PCM if necessary.
• OBD-II scanner
• Multimeter
• Basic hand tools
$500 - $1500
Difficult
• Chevrolet Volt
• Nissan Leaf
• Toyota Prius
• Regular maintenance checks
• Ensure proper cooling of the inverter
• Avoid overloading the vehicle
Electrical System Issue
• Avoid driving the vehicle until repaired.
• Consult with a professional mechanic.
Check with the manufacturer for warranty coverage on hybrid or electric components.
This code has become more common with the rise of hybrid and electric vehicles, where inverters play a crucial role.
High – This issue can affect vehicle performance and should be addressed promptly.
Driving with this code may lead to reduced performance and potential safety risks. Consult a professional mechanic.
• Vehicle at operating temperature
• Inverter under load
The inverter is typically located near the drive motor or within the powertrain assembly.
Q: Can I drive with a P1AFF code?
A: It's not recommended as it may lead to reduced performance and potential safety issues.
Q: How can I prevent inverter issues?
A: Regular maintenance and avoiding overloading the vehicle can help prevent issues.
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.