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Home >> Chevrolet >> 2003 >> Silverado 1500 HD, RWD >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> ENGINE CONTROLS - SELF-DIAGNOSTICS - 4.8L, 5.3L & 6.0L - Flex Fuel & Gasoline >> Diagnostic Tests >> DTC P0135: Ho2S Heater Circuit - Bank 1, Sensor 1 & DTC P0155: Ho2S Heater Circuit - Bank 2, Sensor 1 >> Diagnostic Procedure

Diagnostic Procedure

Fig 1: DTC P0135: HO2S Heater Circuit - Bank 1, Sensor 1 & DTC P0155: HO2S Heater Circuit - Bank 2, Sensor 1 (Steps 1-8)
G00241338Courtesy of GENERAL MOTORS CORP.
Fig 2: DTC P0135: HO2S Heater Circuit - Bank 1, Sensor 1 & DTC P0155: HO2S Heater Circuit - Bank 2, Sensor 1 (Steps 9-22)
G00241339Courtesy of GENERAL MOTORS CORP.
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