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2002 Chevy Suburban 1500, O2 sensor problems

2002 Chevy Suburban 1500, i've got three O2 sensor codes: P0137 (bank 1 sensor 2), P0252 (bank 2, sensor 1), P0157 (bank 2, sensor 2) - all say: O2 Circuit, low voltage. What is causing this and what do i need to do about it? Any help appreciated.

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  • nilnil5 May 11, 2010

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  • Zaraki May 11, 2010

    I have seen dirty MAF (mass air flow sensors) throw multiple o2 trouble codes, do you know how to clean the MAF?



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SOURCE: Please Help... p0404 and p0137 Error Codes (1999 Saturn SL1)

yes egr valve is a common thing on this saturn. very pricy and yes you need the rear o2 sensor good luck i have a used egr if interested off a sl2

Posted on Sep 29, 2008

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SOURCE: code P0157 and P0137

P0157 02 Sensor Circuit Low Voltage (Bank 2 Sensor 2)

P0137 02 Sensor Circuit Low Voltage (Bank I Sensor 2)

There is something that could be making the air and fuel mixture incorrect causing these codes. It don't necessarily mean you need new O2 sensors.

Posted on May 06, 2009

  • 70 Answers


the bank 2 sensor2 is used to check that your catylitic converter is working on that side of the exhaust. without seeing the car and doing sensor tests, it would be a gamble to say replace the sensor. so you can replace it and see what happens or take it to your favorite shop for further diagnosis

Posted on Dec 02, 2009

  • 4669 Answers

SOURCE: Location Of P0137 O2 Sensor Circuit Low Voltage

Bank 1 sensor 2 is the one after the catalytic converter.

Posted on May 17, 2010

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    P0137 / P0157-Oxygen O2 Sensor Circuit Low Voltage (Bank 1, Sensor 2) refers to the second oxygen sensor on Bank 1. P0137 means the O2 oxygen sensor's voltage remained low for longer than 2 minutes. This, is interpreted by the ECM as a low voltage condition and sets the MIL. Bank 1 Sensor 2 is located to the rear of the catalytic converter and should produce an output signal relative to oxygen storage capacity of the catalytic converter. This rear (sensor 2) sensor is less active than the signal produced by the front sensor. However, if the ECM senses the sensor is inactive, this code will set.

    A code P0137 may mean that one or more of the following has happened:

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    Hi P0157 is
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