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Home >> Chevrolet >> 2003 >> Silverado 1500 HD, 4WD >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> ENGINE CONTROLS - SELF-DIAGNOSTICS - 4.8L, 5.3L & 6.0L - Flex Fuel & Gasoline >> Diagnostic Tests >> DTC P1133: Ho2S Circuit - Insufficient Switching - Bank 1, Sensor 1 & DTC P1153: Ho2S Circuit - Insufficient Switching - Bank 2, Sensor 1 >> Diagnostic Procedure

Diagnostic Procedure

Fig 1: DTC P1133: HO2S Circuit - Insufficient Switching - Bank 1, Sensor 1 & DTC P1153: HO2S Circuit - Insufficient Switching - Bank 2, Sensor 1 (Steps 1-8)
G00241415Courtesy of GENERAL MOTORS CORP.
Fig 2: DTC P1133: HO2S Circuit - Insufficient Switching - Bank 1, Sensor 1 & DTC P1153: HO2S Circuit - Insufficient Switching - Bank 2, Sensor 1 (Steps 9-13)
G00241416Courtesy of GENERAL MOTORS CORP.
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