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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 141 (Engine Controls Self-Diagnostics - 5.7L - Bi-Fuel) >> Diagnostic Tests >> DTC P0134 & P0154: Ho2S Bank 1 & 2 Sensor 1 Circuit - Insufficient Activity >> Conditions For Setting DTC

Conditions For Setting DTC

WARNING: This page is about a different car, the 2002 GMC Savana Special, 2002 GMC Savana Camper Special, 2002 GMC Savana, and 2002 Chevrolet Chevy Express. However, it is still accessible from the selected car via links, so may be relevant.

The AF ECM monitors an HO2S signal voltage stuck between 0.347 volt and 0.550 volt (inactive) for 9 seconds continuously; or the AF ECM monitors an HO2S signal voltage between 0.00 volts and 1.0 volt that has not performed a Rich/Lean switch for 15 seconds continuously.

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