A P0303 code in your 2020 Chevrolet Camaro indicates the engine control module has detected excessive misfires at cylinder 3. The Camaro offers multiple powertrain options—the 2.0L Turbo four-cylinder, 3.6L V6, naturally aspirated 6.2L LT1 V8, and the supercharged 6.2L LT4 V8 in the ZL1. Each engine requires specific diagnostic considerations for this performance-oriented sports car.
Cylinder 3 Location by Engine
In the 2.0L Turbo inline-four, cylinder 3 is third from the front. For the V6 and V8 engines, cylinder 3 is on the driver's side bank, second position from the front following GM's traditional numbering. The supercharged LT4 shares this layout with the LT1. These high-performance engines demand precise cylinder operation.
Performance Engine Characteristics
The Camaro's engines are designed for performance, with the LT1 producing 455 horsepower and the supercharged LT4 generating 650 horsepower. These high-output engines operate under greater stress than typical passenger car engines. Ignition systems must deliver strong, consistent spark, and fuel delivery must be precisely timed.
Common P0303 Causes in Performance Engines
Spark plug wear is accelerated in high-performance applications, especially with spirited driving. Ignition coil failure is common across all engines. The 2.0L Turbo and supercharged LT4 face additional boost-related considerations. Fuel injector issues affect direct-injected engines. Carbon buildup in DI engines affects airflow.
V8 Dynamic Fuel Management
The LT1 V8 features Active Fuel Management (AFM) that can deactivate cylinders for fuel economy. While cylinder 3 isn't typically a deactivation cylinder in traditional AFM, system issues can affect overall engine operation. Listen for lifter tick that may indicate AFM-related problems.