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Home >> Lexus >> 2008 >> GX 470 >> Repair and Diagnosis >> Engine Performance >> Engine Control System >> SFI System >> DTC P1441 Stuck Open in Secondary Air Injection Vacuum Switching Valve Bank 1; DTC P1444 Stuck Open in Secondary Air Injection Vacuum Switching Valve Bank 2; DTC P2440 Secondary Air Injection System Switching Valve Stuck Open Bank 1 >> Monitor Strategy

Monitor Strategy

MONITOR STRATEGY

Related DTCs P1441 Air valve bank 1 open stuck
P1444 Air valve bank 2 open stuck
P1441 and P1444 Air valve bank 1 and bank 2 open stuck
P2440 Air valve open stuck
P2440 Air valve bank 1 and bank 2 open stuck
Required sensors/Components (main) AIR valve, AIR VSV bank 1, AIR VSV bank 2
Required sensors/Components (sub) AIR pressure sensor
Frequency of operation Once per driving cycle
Duration Within 20 seconds
MIL operation 2 driving cycles P1441 and P1444 Immediate. P2440
Sequence operation None