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Home >> GMC >> 1997 >> Forward Control 4.3 W, L35, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 59 (Engine Controls - Tests W/Codes - 5.0L - G Vans) >> Diagnostic Trouble Codes >> DTC P1154 - Ho2S Transition Time Ratio Bank 2, Sensor 1 >> Circuit Description

Circuit Description

WARNING: This page is about a different car, the 1997 GMC Savana, 1997 Chevrolet Chevy Van, and 1997 Chevrolet Chevy Express. However, it is still accessible from the selected car via links, so may be relevant.

This diagnostic test is used in conjunction with HO2S bank 2, sensor 1 slow response diagnostic test P0153. Ratio of response times that were calculated are compared to calibrated limits. If number of lean to rich and rich to lean transitions were zero, ratios will be set to zero. Otherwise, ratio is calculated based on which average response time was greater. DTC will set when the following conditions are present:

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