The P0303 diagnostic trouble code on your 2024 Cadillac Escalade indicates the powertrain control module has detected consistent misfires in cylinder 3. The flagship SUV continues with the powerful 6.2L V8 featuring Dynamic Fuel Management.
2024 Escalade Powertrain
The 2024 Escalade's L87 6.2L V8 produces 420 horsepower with DFM for improved efficiency. Cylinder 3 is on the driver's side bank. The Escalade-V uses a supercharged variant with different characteristics.
Typical Causes
- DFM Component Failure: Cylinder deactivation lifters and solenoids
- Ignition Coil Problems: Coil-on-plug units fail over time
- Spark Plug Condition: V8 requires specific plugs
- Fuel Injector Issues: Direct injection deposits
- Software Calibration: ECM updates may address concerns
Diagnostic Process
Use GM diagnostics to monitor DFM operation and misfire data. Check for correlation between DFM events and misfires. Test ignition components systematically. Check for applicable TSBs.
Repair Recommendations
Replace faulty ignition coils with AC Delco parts. For DFM-related issues, lifter replacement following GM procedures is required. Dealer service ensures warranty coverage.