A P0303 diagnostic code on your 2022 Cadillac Escalade indicates the engine control module has detected repeated misfires in cylinder 3. The full-size luxury SUV uses GM's powerful 6.2L V8 with Dynamic Fuel Management.
6.2L V8 Engine Configuration
The 2022 Escalade uses the L87 6.2L V8 producing 420 horsepower with Dynamic Fuel Management (DFM). Cylinder 3 is located on the driver's side (left) bank. DFM allows the engine to deactivate cylinders, adding diagnostic complexity.
Common Causes
- DFM Lifter Problems: Cylinder deactivation lifters can fail
- Ignition Coil Failure: Individual coil packs fail over time
- Spark Plug Issues: V8 engines require specific spark plugs
- Fuel Injector Problems: Direct injection deposits or failures
- AFM/DFM Solenoid Issues: Oil control solenoid failures
Diagnostic Approach
Use GM diagnostic equipment to monitor DFM operation. Check if misfires correlate with cylinder deactivation events. Test ignition components systematically. Review TSBs for known DFM issues.
Repair Solutions
Replace failed ignition coils with AC Delco components. For DFM-related failures, lifter replacement may be required. Some owners opt for DFM delete during major repairs to prevent recurrence.