1999 Chevy Silverado

Tiny
BADDBILT
  • MEMBER
  • 1999 CHEVROLET SILVERADO
  • V8
  • 2WD
  • AUTOMATIC
  • 73,000 MILES
Engine trouble code P0157 bank 2 sensor 2, and P1153 bank 2 sensor 1.
Truck runs fine but it seems to bleed fuel pressure off rail very fast.I have replaced the fuel regulator and it still bleeds off.
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Wednesday, February 4th, 2009 AT 7:04 PM

3 Replies

Tiny
BLUELIGHTNIN6
  • EXPERT
Hello
Thanks for the donation.

Inspect wiring to oxygen sensors. If OK, inspect oxygen sensors. To learn how to check an O2 sensor follow the link below.

http://www.2carpros.com/how_to/how_to_test_oxygen_sensor.htm

Let me know what happens with fuel pressure at rail after repairs are made to O2 sensors.

Thanks for using 2CarPros.com!
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Wednesday, February 4th, 2009 AT 10:18 PM
Tiny
BADDBILT
  • MEMBER
Okay I changed the pump fixed the pressure drop but still has a trouble code random mis fire?Should I try and check the 02s?The wires are in good shape and not touching anything. But the 02 trouble shooting says you cant check with a miss fire. Pass cat seems much hotter than driver side?Any other things to look at wires are two yrs old same with the plugs.
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Thursday, February 5th, 2009 AT 10:32 PM
Tiny
BLUELIGHTNIN6
  • EXPERT
I would suggest first checking out the 02 sensors before going any further. Especially on the side with the hotter catalytic. Is the cat. Glowing red or orange? An oxygen sensor failure can lead to incorrect readings of exhaust gasses. The faulty sensor can cause a too-rich or too-lean condition. Too rich and the catalyst can melt down. Too lean and the converter is unable to convert the hydrocarbons into safe elements and may not pass a state inspection. If O2 sensor failed then it probably has damaged the converter as well.

Let me know how the sensors test out and I will follow up.

Thanks for using 2CarPros. Com!
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Friday, February 6th, 2009 AT 12:21 AM

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