Display Group 10, Field 1, Sum Of O2 Sensor Control (Cyls. 1-3) & Momentary O2 Sensor Learning Value (Cyls. 1-3)

There should be less than 8 points difference between displayed values in fields 1 and 2. If difference is more than 8 points, check for faulty spark plugs, fuel injectors or oxygen sensor. Check for intake air leak and incorrect ignition timing.