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zac 12/6/2011
2000 Chevrolet Silverado 2500 LT 8 Cyl 6.0L - Engine
Why do I have a long start time and sometimes I need to step on gas to get it to start?
150,000 miles; 4x4 extended cab;fuel pump does come on;oxygen sensors long overdue;check engine light comes on for days then goes out for days with 02 sensors listed. DO I still need to replace fuel pump as well as 02 sensors?Could this also be fuel pressure regulator?
2 Answers
  • CVO
    CVO 12/8/2011
    The check engine light doesn't have to be ON to store a fault code.

    1.Local auto parts stores such as Autozone ( not in California) or Advance Auto parts will scan and retrieve any diagnostic trouble codes stored in the powertrain control module for free of charge..

    2. has the code reader for less than $22.00 dollars.

    3.Re-post the dtc's in here " answer question " and we will advise the repair.

    Note: we need the dtc's to identify the sensor, there're a dozen different sensors to operate the car and we can't do with a guesswork.

    Visit this site and see all the sensors.

    Navigate to this site and see the code reader.

    Note: test the fuel pump pressure, it should be 60 -66 psi.
    zac 12/9/2011
    code said P0157 o2 sensor circuit low voltage (bank2 sensor2) now I need to locate this sensor.
  • CVO
    CVO 12/9/2011
    The O2 sensor2 ( Bank2 is referred to the exhaust manifold with the cylinders 2, 4, 6,8 ) mounted after the catalyst. For more information, visit this link.

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