DTC Troubleshooting: P027F, P2DD8 (3.5L Engine) (2025): Notes

DTC P027F  : Cold Start Air Fuel Ratio Control System Command Rich Bank1 DTC P2DD8  : Cold Start Air Fuel Ratio Control System Command Rich Bank2

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 (3.5L Engine) or How to Troubleshoot the Fuel and Emissions Systems (3.0L Engine) .