A P0302 trouble code in your 2022 Chevrolet Traverse indicates the powertrain control module has detected misfires in cylinder 2. The 2022 Traverse continues with the proven 3.6L V6 LFY engine featuring direct injection and variable valve timing. This engine produces 310 horsepower and 266 lb-ft of torque, providing reliable performance when all cylinders fire properly.
Understanding the Misfire Condition
The PCM monitors crankshaft position sensor signals to detect variations in rotational speed. When cylinder 2 fails to produce its expected power contribution, the crankshaft momentarily slows, and the PCM logs a misfire event. Enough events within a calculated number of engine revolutions trigger the P0302 code.
Primary Causes in 2022 Models
Despite being a relatively new vehicle, several issues can cause cylinder 2 misfires. Ignition coil failure remains common, especially with electrical system stress from modern accessories. Spark plug fouling can occur from short-trip driving or oil consumption issues. Direct injection carbon buildup, while typically a higher-mileage concern, can develop on vehicles with certain driving patterns.
Recognizing Misfire Symptoms
Symptoms include rough idle, particularly noticeable when in Drive at a stoplight. Engine vibration may transfer through the steering wheel or seat. Acceleration hesitation, reduced fuel economy, and the illuminated check engine light are typical indicators. Severe misfires may cause the light to flash.
Step-by-Step Diagnosis
Retrieve diagnostic codes and freeze frame data to understand when misfires occur. Inspect spark plug and ignition coil on cylinder 2, which requires accessing the rear bank of the V6. Monitor misfire counts with a scan tool during various operating conditions. Check fuel injector operation and fuel pressure. Compression testing verifies cylinder integrity.
Repair Recommendations
Replace spark plugs with GM-recommended AC Delco iridium plugs if due or fouled. Test and replace the cylinder 2 ignition coil if faulty. Clean or replace the fuel injector if fuel delivery is compromised. For carbon buildup, intake valve cleaning using walnut blasting provides lasting results. Address any oil consumption issues contributing to spark plug fouling.