When your 2020 Chevrolet Camaro displays the P0305 code, the engine control module has detected repeated misfires in cylinder 5. The 2020 Camaro offers three engine options: the 2.0L turbo four-cylinder, 3.6L V6, and various V8s (6.2L LT1 in SS, supercharged LT4 in ZL1). P0305 is valid on V6 and V8 models but anomalous on the 2.0L four-cylinder.
Identifying Your Camaro's Engine
The 2.0L Turbo I-4 (275 hp) is in the base LT trim—P0305 would be anomalous. The 3.6L V6 (335 hp) is in the LT and 1LT trims. The 6.2L LT1 V8 (455 hp) is in the SS. The supercharged 6.2L LT4 (650 hp) is in the ZL1. V6 and V8 models have cylinder 5.
Cylinder 5 Location
On the 3.6L V6, cylinder 5 is on the rear bank. On GM's small-block V8 (LT1/LT4), cylinder 5 is at the front of the driver side bank. GM places odd-numbered cylinders on the driver side for V8s.
Common Causes
On high-performance engines, spark plug wear occurs faster, especially with spirited driving. Ignition coil failure is possible. Active Fuel Management (on the V8) can cause lifter issues. Direct injection leads to carbon buildup over time. Fuel system issues can cause lean misfires.
Diagnostic Process
Confirm which engine is installed. Access cylinder 5's spark plug and inspect for wear. Test the ignition coil. On V8s, check for AFM-related issues. High-performance driving increases component wear—review driving patterns when diagnosing.