DTC Troubleshooting: U0129 (1.5L Engine, PGM-FI System): Notes

DTC U0129  : PF-CAN Malfunction (Powertrain Control Module (PCM)-Electric Vacuum Pump Control Unit)

How to use this service information .

NOTICE: 

Before you troubleshoot, review the How to Troubleshoot - Refer to: How to Troubleshoot the Fuel and Emissions Systems (1.5L Engine) or How to Troubleshoot the Brake Booster Pressure Monitoring System or How to Troubleshoot the Fuel and Emissions Systems (2.0L Engine) (2024 2025) or How to Troubleshoot the CVT System .

NOTE: 

• DTC may be stored if the electric vacuum pump control unit does not start normally.
• DTC may be stored due to the power/ground circuit failure of the electric vacuum pump control unit. Before this troubleshooting, check the power/ground circuit of the electric vacuum pump control unit first.