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Home >> Lexus >> 2009 >> IS 250 AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (DTCS P0420 - U0101 & Circuit Tests) >> SFI System >> MIL Circuit >> Inspection Procedure
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Inspection Procedure

HINT: 

Troubleshoot each problem symptom in accordance with the chart below.

MIL remains illuminated Start inspection from step 1
MIL not illuminated Start inspection from step 4
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