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Home >> Chevrolet >> 1997 >> C3500 HD 6.5 F, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 67 (Engine Controls - Tests W/Codes - 5.7L) >> Diagnostic Trouble Codes >> DTC P1154 - Ho2S Transition Time Ratio Bank 2, Sensor 1 >> Circuit Description

Circuit Description

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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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