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oxygen sensor

  1. Downstream O2 Sensor

    Problems, Driver Warnings or DTCs - Chevy Volt
    Hi Everyone, Gen 1-2011 Today I received a load of error codes relating to O2 Sensor issues, seemingly the Bank 1 Sensor 2, or from what I can tell, the downstream sensor post catalytic converter. I figure I'd try to replace the sensor before taking it to a shop, but I'm having difficulty...
  2. Can't get Emissions Ready status

    Problems, Driver Warnings or DTCs - Chevy Volt
    My '13 volt has been an emissions nightmare since I got it with a 100K miles (now @ 197K). When I bought it the car's comprehensive mpg calculated to be 32 and was predominantly ICE driven (10K miles on electric) . Historically, it would get emissions ready after some work; changing oxygen...