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Home >> GMC >> 2003 >> Safari Van Cargo, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 401 (Engine Controls - Self Diagnostics - 8.1L) >> Diagnostic Tests >> DTC P0135: Ho2S Heater Circuit - Bank 1, Sensor 1, DTC P0141: Ho2S Heater Circuit - Bank 1, Sensor 2, DTC P0155: Ho2S Heater Circuit - Bank 2, Sensor 1 & DTC P0161: Ho2S Heater Circuit - Bank 2, Sensor 2 >> Test Description

Test Description

WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2003 GMC Yukon XL, 2003 GMC Sierra, 2003 GMC Cab & Chassis Sierra, 2003 Chevrolet Suburban, and 2003 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.

The numbers below refer to the step numbers in the diagnostic procedure.

  1. 7

    With no fault present, the test lamp will blink once per second.