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Chevrolet
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2003
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Silverado 1500 HD, RWD
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Repair and Diagnosis
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Engine Performance
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Testing & Diagnosis
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ENGINE CONTROLS - SELF-DIAGNOSTICS - 4.8L, 5.3L & 6.0L - Flex Fuel & Gasoline
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Diagnostic Tests
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DTC P0141: Ho2S Heater Circuit - Bank 1, Sensor 2 & DTC P0161: Ho2S Heater Circuit - Bank 2, Sensor 2
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Conditions For Setting DTC
Conditions For Setting DTC
The PCM detects that the affected HO2S Heater current parameter is less than 0.25 amps, or more than 1.375 amps (4.8L 7 6.0L) or 3.125 amps (5.3L).
The above condition is met for 10 seconds.