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Wiring diagrams Section: Testing & Diagnostics

Engine Control System (Sfi) - Diagnosis: Diagnosis
Engine Control System (Sfi) - Diagnosis: Wiring
DTC P0031: OXYGEN (A/F) SENSOR HEATER CONTROL CIRCUIT LOW (BANK 1 SENSOR 1), DTC P0032: OXYGEN (A/F) SENSOR HEATER CONTROL CIRCUIT HIGH (BANK 1 SENSOR 1), DTC P0051: OXYGEN (A/F) SENSOR HEATER CONTROL CIRCUIT LOW (BANK 2 SENSOR 1), DTC P0052: OXYGEN (A/F) SENSOR HEATER CONTROL CIRCUIT HIGH (BANK 2 SENSOR 1)
Engine Control System (Sfi) - Diagnosis: Other
P0441
P0446
P0442, P0456
DTC P2195: OXYGEN (A/F) SENSOR SIGNAL STUCK LEAN (BANK 1 SENSOR 1), DTC P2196: OXYGEN (A/F) SENSOR SIGNAL STUCK RICH (BANK 1 SENSOR 1), DTC P2197: OXYGEN (A/F) SENSOR SIGNAL STUCK LEAN (BANK 2 SENSOR 1), DTC P2198: OXYGEN (A/F) SENSOR SIGNAL STUCK RICH (BANK 2 SENSOR 1)
DTC P2237: OXYGEN SENSOR PUMPING CURRENT CIRCUIT/OPEN (FOR A/F SENSOR)(BANK 1 SENSOR 1), DTC P2238: OXYGEN SENSOR PUMPING CURRENT CIRCUIT LOW (FOR A/F SENSOR)(BANK 1 SENSOR 1), DTC P2239: OXYGEN SENSOR PUMPING CURRENT CIRCUIT HIGH (FOR A/F SENSOR)(BANK 1 SENSOR 1), DTC P2240: OXYGEN SENSOR PUMPING CURRENT CIRCUIT/OPEN (FOR A/F SENSOR)(BANK 2 SENSOR 1), DTC P2241: OXYGEN SENSOR PUMPING CURRENT CIRCUIT LOW (FOR A/F SENSOR)(BANK 2 SENSOR 1), DTC P2242: OXYGEN SENSOR PUMPING CURRENT CIRCUIT HIGH (FOR A/F SENSOR)(BANK 2 SENSOR 1), DTC P2251: OXYGEN SENSOR REFERENCE GROUND CIRCUIT/OPEN (FOR A/F SENSOR)(BANK 1 SENSOR 1), DTC P2252: OXYGEN SENSOR REFERENCE GROUND CIRCUIT LOW (FOR A/F SENSOR)(BANK 1 SENSOR 1), DTC P2253: OXYGEN SENSOR REFERENCE GROUND CIRCUIT HIGH (FOR A/F SENSOR)(BANK 1 SENSOR 1), DTC P2254: OXYGEN SENSOR REFERENCE GROUND CIRCUIT/OPEN (FOR A/F SENSOR)(BANK 2 SENSOR 1), DTC P2255: OXYGEN SENSOR REFERENCE GROUND CIRCUIT LOW (FOR A/F SENSOR)(BANK 2 SENSOR 1), DTC P2256: OXYGEN SENSOR REFERENCE GROUND CIRCUIT HIGH (FOR A/F SENSOR)(BANK 2 SENSOR 1)

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P0441 Toyota Sienna II

Testing & Diagnostics

The VSV for EVAP is used to purge the evaporative emissions from the fuel tank into the intake manifold. Also, it creates a vacuum inside the fuel tank in unison with the operation of the VSV for CCV (canister closed valve) and leak tests are performed using this vacuum. When the VSV for EVAP remains close (closeed malfunction), the vacuum inside the fuel tank does not change. When the VSV for EVAP remains open (opened malfunction), the vacuum inside the fuel tank changes according to the operation of the VSV for CCV.