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where is sensor on 1998 chevy 5.7l pick up

code reading of PO155 (02sensor heater circuit malfunction bank 2 sensor 1) where is this sensor located on 1998 chevy 1/2 ton 4x4 5.7 liter
asked Feb 7, 2011 by anonymous
I have a 99 chevy k1500 4x4 ext. cab,old body style 5.7 Ltr with 110,000 mi.I have had same issues as most people with the sensors.Best bet is Replace all the O2 sensors.You shouldnt have these problems at least for quite some time unless there are other issues going on or may pop-up later.I replaced 2 of the O2 sensors already.Planning on doing all.I replaced Bank1 before Cat and now Bank2 after the cat.I have True dual exhaust,with 2 cats.Also have replaced head gasket and radiator.Truck Runs Great Now!

1 Answer

Bank 2 Sensor 1 means that the sensor is the right front O2 sensor. #5 on the image.

answered Feb 7, 2011 by OBDIITech (2,389 points)

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