Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
The car's computer is getting a signal that says the electric motor's voltage isn't being measured correctly. It's like if a toy's battery checker says the battery is full, but the toy doesn't work.
This code indicates that the voltage isolation sensor for Drive Motor 'A' is reading a higher voltage than expected, which can mean there's a problem with the sensor or the circuit.
The P1AF5 code is triggered when the Powertrain Control Module (PCM) detects a high voltage condition in the voltage isolation sensor circuit for Drive Motor 'A'. This sensor is responsible for ensuring that the voltage levels in the motor are isolated correctly to prevent electrical faults.
• Check Engine Light is on
• Reduced vehicle performance
• Potentially limited electric motor operation
• Faulty voltage isolation sensor
• Wiring issues such as shorts or opens in the circuit
• Faulty PCM or related control module
PCM: Powertrain Control Module
OBD-II: On-Board Diagnostics, Second Generation
• Use an OBD-II scanner to confirm the code.
• Inspect the wiring and connectors for the voltage isolation sensor.
• Test the voltage isolation sensor for proper operation.
• Replace the faulty voltage isolation sensor.
• Repair or replace damaged wiring or connectors.
• Reprogram or replace the PCM if necessary.
• OBD-II scanner
• Multimeter
• Basic hand tools
$150 - $500
Moderate
• Chevrolet Volt
• Nissan Leaf
• Toyota Prius
• Regular maintenance checks of the electrical system
• Ensure all sensors and wiring are in good condition
• Avoid water exposure to sensitive electrical components
Sensor Issue
• Do not ignore the Check Engine Light.
• Have the vehicle inspected by a professional as soon as possible.
Check with the vehicle manufacturer for warranty coverage on electrical components.
This code has been associated with hybrid and electric vehicles as they rely heavily on precise voltage management.
Moderate – It should be addressed soon to avoid potential damage to the vehicle's electrical system.
Driving with this code may lead to further electrical issues and reduced vehicle performance.
• Vehicle must be in a safe, stationary position.
• Ensure the vehicle's battery is fully charged.
The voltage isolation sensor is typically located near the drive motor or within the vehicle's power control module.
Q: Can I drive my car with a P1AF5 code?
A: It's not recommended to drive for extended periods with this code, as it may lead to further electrical issues.
Q: How do I reset the P1AF5 code?
A: After repairs, use an OBD-II scanner to clear the code. If the issue is resolved, it should not return.
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