LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Subaru >> 2021 >> WRX STI >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (Diagnostics) (2.5L) - Introduction >> Drive Cycle >> Procedure >> Drive Cycle B
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Drive Cycle B

DTC Item Condition Number of driving cycles on the detecting condition
P0125 INSUFFICIENT COOLANT TEMPERATURE FOR CLOSED LOOP FUEL CONTROL «Coolant Temp.» at engine start: Less than -15°C (5°F) 2
P0137 O2 SENSOR CIRCUIT LOW VOLTAGE BANK 1 SENSOR 2 - 2
P0138 O2 SENSOR CIRCUIT HIGH VOLTAGE BANK 1 SENSOR 2 - 2
P0171 SYSTEM TOO LEAN BANK 1 Complete diagnosis with drive cycle A as well. 2
P0172 SYSTEM TOO RICH BANK 1 Complete diagnosis with drive cycle A as well. 2
P0300 RANDOM/MULTIPLE CYLINDER MISFIRE DETECTED Complete diagnosis with drive cycle A as well. 2
P0301 CYLINDER 1 MISFIRE DETECTED Complete diagnosis with drive cycle A as well. 2
P0302 CYLINDER 2 MISFIRE DETECTED Complete diagnosis with drive cycle A as well. 2
P0303 CYLINDER 3 MISFIRE DETECTED Complete diagnosis with drive cycle A as well. 2
P0304 CYLINDER 4 MISFIRE DETECTED Complete diagnosis with drive cycle A as well. 2
P0500 VEHICLE SPEED SENSOR "A" CIRCUIT - 1
P0506 IDLE CONTROL SYSTEM RPM - LOWER THAN EXPECTED - 2
P0507 IDLE CONTROL SYSTEM RPM - HIGHER THAN EXPECTED - 2
P2096 POST CATALYST FUEL TRIM SYSTEM TOO LEAN BANK 1 Complete diagnosis with drive cycle A as well. 2
P2097 POST CATALYST FUEL TRIM SYSTEM TOO RICH BANK 1 Complete diagnosis with drive cycle A as well. 2
  1. Drive at 10 km/h (6 MPH) or more.
  2. Stop the vehicle and idle for ten minutes.
  3. Read the temporary code using the Subaru Select Monitor or general scan tool. Refer to ENGINE (DIAGNOSTICS) (STI)>READ DIAGNOSTIC TROUBLE CODE (DTC)>OPERATION .
scientia non olet · About LEMON Manuals