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P0157 Diagnostic Trouble Code Discussion for August 2005

Heated Oxygen Sensor (Bank 2 Sensor 2) Circuit Low Voltage

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Trouble Ticket Help Requests for DTC P0157
Help Request Posted
1999 Chevrolet Silverado 2500 6.0L Hesitation, Back fire VIN: 1GCGK29U0X
P0157: Heated Oxygen Sensor (Bank 2 Sensor 2) Circuit Low Voltage. Hesitates only for about the first 4 or 5 accelerations after start up. Back fires through intake manifold. On wide open throttle O2 goes lean. Bank 1 cat is partially plugged on back pressure test it is at 3 psi at 2500 rpm and Bank 2 is at 1 1/4 psi at 2500 ...
August 02, 2005