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Home >> Lexus >> 2017 >> LX 570 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - Diagnostic Codes (4 Of 7) >> SFI System >> DTC P144C: Open in Secondary Air Injection System Heater Control Circuit; DTC P144D: Short in Secondary Air Injection System Heater Control Circuit [09/2015 - ] >> Monitor Strategy

Monitor Strategy

Related DTCs P144C: Air pump heater relay circuit range check (Low voltage)
P144D: Air pump heater relay circuit range check (High voltage)
Required Sensors/Components (Main) Air pump heater relay
Required Sensors/Components (Related) -
Frequency of operation Continuous
Duration 5 seconds
MIL operation Immediate
Sequence of operation None