DTC Troubleshooting: U0101 (1.5L Engine, PGM-FI System): Notes

DTC U0101  : PF-CAN Malfunction (Powertrain Control Module (PCM)-Transmission Control Module (TCM))

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 TCM does not start normally.
• DTC may be stored due to the power/ground circuit failure of the TCM. Before this troubleshooting, check the power/ground circuit of the TCM first.