P0157 Diagnostic Trouble Code Discussion for March 2021
Heated Oxygen Sensor (Bank 2 Sensor 2) Circuit Low Voltage
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| Help Request | Posted | |
| 1997 GMC C3500 Sierra SL 7.4L Excessive Emissions VIN: 1GDJC34J6V P0157: Heated Oxygen Sensor (Bank 2 Sensor 2) Circuit Low Voltage. As this is a heavy duty vehicle, it has to pass a tail pipe test in Oregon and failed due to high hydrocarbons. The check engine light was never a problem until they got in line for emissions testing. I verified that it had flat lined and replaced B2S2. I ... |
March 17, 2021 |
