If your 2022 Chevrolet Equinox is displaying a P0305 code indicating a cylinder 5 misfire, this code requires diagnostic investigation. The 2022 Equinox is powered by four-cylinder engines only—either the 1.5L turbocharged four-cylinder or the 2.0L turbocharged four-cylinder (on Premier and RS trims). Neither engine has a cylinder 5, making this code anomalous.
2022 Equinox Engine Options
The 2022 Equinox (second generation) offers the 1.5L Turbo I-4 producing 170 horsepower on most trims. The 2.0L Turbo I-4 producing 252 horsepower is available on Premier and RS trims. Both are four-cylinder engines with cylinders numbered 1-4 only.
Understanding the Anomalous Code
Since the Equinox doesn't offer an engine with more than four cylinders, P0305 referencing cylinder 5 cannot represent an actual misfire. This is an erroneous code requiring investigation into diagnostic system issues rather than engine problems.
Possible Causes
ECM software glitches can store invalid codes. Scan tool communication errors may misread vehicle data. Aftermarket diagnostic tools may have compatibility issues with GM electronics. Low battery voltage affects ECM reliability. Residual data from diagnostic equipment used on other vehicles could appear.
Diagnostic Steps
Verify which engine is installed (1.5L or 2.0L—both are 4-cylinder). Use a GM-compatible scan tool to confirm stored codes. Check battery condition. If actual misfire symptoms exist, diagnose cylinders 1-4 using standard procedures. Clear the erroneous P0305 and monitor for valid codes.