DTC	Item	Condition
P219A	Bank 1 Air-Fuel Ratio Imbalance	-

WARNING: When performing the drive cycle R on the public road, be very careful of the traffic condition and the safe driving must be the high priority.

Check the data in condition column of table by using the Subaru Select Monitor or general scan tool.
NOTE:
- Subaru Select Monitor
  For detailed operation procedures, refer to "Current Data Display For Engine". < Ref. to DISPLAY CURRENT ENGINE DATA , OPERATION, Subaru Select Monitor. >
- General scan tool
  For detailed operation procedures, refer to the general scan tool operation manual.
Keep the engine at idle for at least 30 seconds in a fully warm-up condition.
Start the driving.
With the gear position in the 4th, take 10 seconds to accelerate from 1500 rpm to 4000 rpm.
Decelerate to 1500 rpm in the 4th gear position. (There is no restrictions to the deceleration duration and how to use the brake.)
Repeat steps 4) and 5) 10 times (end when the temporary code is acquired).

Fig 1: Driving Pattern (Drive Cycle R)
Courtesy of SUBARU OF AMERICA, INC.

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.

• Brakes feel soft, pull hard to one side, or make grinding noises.

• The engine overheats, stalls repeatedly, or misfires under load.

• You are missing required tools, torque specs, or safe lifting equipment.

• You are not confident in the next step or safety outcome.

Safety Warning

Drive Cycle R

Use the Manual With the Right Hardware

When to See a Mechanic

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