Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSSUBARU2002LEGACY GT WAGON AWD F4-2.5L SOHCREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSTESTING AND INSPECTIONMONITORS, TRIPS, DRIVE CYCLES AND READINESS CODES
2002 Subaru Legacy GT Wagon AWD F4-2.5L SOHC
Monitors, Trips, Drive Cycles and Readiness Codes
2002 Subaru Legacy GT Wagon AWD F4-2.5L SOHCSECTION Monitors, Trips, Drive Cycles and Readiness Codes
Drive Cycle
OPERATION
There are 3 drive patterns for trouble diagnosis. Driving in the specified pattern allows to diagnose the malfunctioning items listed below. After the malfunctioning items listed below are repaired, always check whether they correctly resume their functions by driving in the required drive pattern.
PREPARATION FOR THE DRIVE CYCLE
1. Make sure that fuel remains approx. half amount [20 to 40 l (5.3 - 10.6 US gal, 4.4 - 8.8 Imp gal)], and battery voltage is 12 V or more.
2. After performing diagnostics and cleaning the memory, check for any remaining unresolved trouble data.
3. Separate test mode connector.
NOTE:
- Except for water temperature specified items at starting, diagnosis is carried out after engine warm up.
- Carry out diagnosis which is marked * on DTC twice, Then, after finishing 1st diagnosis, stop engine and do the second time at the same condition.
AFTER RUNNING 20 MINUTES AT 80 KM/H (50 MPH), IDLE ENGINE FOR 1 MINUTE.
IDLE FOR 10 MINUTES
DRIVE ACCORDING TO THE DRIVE PATTERN
OPERATION
There are 3 drive patterns for trouble diagnosis. Driving in the specified pattern allows to diagnose the malfunctioning items listed below. After the malfunctioning items listed below are repaired, always check whether they correctly resume their functions by driving in the required drive pattern.
PREPARATION FOR THE DRIVE CYCLE
1. Make sure that fuel remains approx. half amount [20 to 40 l (5.3 - 10.6 US gal, 4.4 - 8.8 Imp gal)], and battery voltage is 12 V or more.
2. After performing diagnostics and cleaning the memory, check for any remaining unresolved trouble data.
3. Separate test mode connector.
NOTE:
- Except for water temperature specified items at starting, diagnosis is carried out after engine warm up.
- Carry out diagnosis which is marked * on DTC twice, Then, after finishing 1st diagnosis, stop engine and do the second time at the same condition.
P0111 - P1448:
AFTER RUNNING 20 MINUTES AT 80 KM/H (50 MPH), IDLE ENGINE FOR 1 MINUTE.
P0483 - P0507:
IDLE FOR 10 MINUTES
P0065 - P1142:
DRIVE ACCORDING TO THE DRIVE PATTERN
RENDER: 1.0x
NO RELATED
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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.