Main-Code What it means:
A Replace just the Engine Oil
B Replace the Engine Oil, Oil Filter, Inspect Front and Rear Brakes, Check the Parking Brake Adjustment, Inspect other items specific to the Vehicle
Sub-Code What it means:
1 Rotate Tires
2 Replace the Air Cleaner Element, Check the Drive Belt, Replace the Dust and Pollen Filter
3 Replace the Transmission Fluid and Transfer Fluid (if equipped)
4 Replace the Spark Plugs, Replace the Timing Belt (if equipped), Inspect the Water Pump,Inspect Valve Clearance
5 Replace the Engine Coolant
6 Replace Rear Differential Fluid (if equipped)