Question about 2001 Chevrolet Blazer

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2001 Blazer - engine warning light stays on

The engine warning light stays on permanently. Any ideas what could be wrong?? The trouble code is "P1055 S circuit high voltage B152". I trust this makes sense.

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  • carschb Aug 04, 2008

    The trouble code is P1055 not P0155 as noted by you. The other difference is the last code should read B1S2 and not B152 as I had originally stated.

  • stark321 Aug 06, 2008

    2001 blazer. service engine lights stays on but truck seems to run fine, what would cause this?

  • watermano May 20, 2009

    The engine warning light stays on permanently. Any ideas what could be wrong??

  • yadayada
    yadayada May 11, 2010

    Sorry bout that. did you reference the link for code difinitions?

  • yadayada
    yadayada May 11, 2010

    P0155 - Heated Oxygen Sensor (HO2S) Heater Performance Bank 2 Sensor 1, most likely cause is bank one O2 sensor is failing or has failed (low volt signal), this is the bank of cylinders opposite were #1 cylinder is located. Are you sure you have the correct code listed in your question?? my is taken right from the book, P0155 is an O2 code. Make sure the sensor is connected, this is the sensor before the cat(s). Gere is a useful link to ID all types of GM Data trouble codes:

    http://myweb.accessus.net/~090/dtcobd2.h...

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We got this sorted out didn't we? please leave me feedback on the repair.

Posted on Aug 07, 2008

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