engine codes

1999 CHEVROLET SUBURBAN
98,000 MILES • V8 • 4WD • AUTOMATIC
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CFORER
  • MEMBER
  • 1 POST
What should I look for when codes PO159 and PO174 come up?
Jul 30, 2011 at 8:03 PM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.
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JDL
  • AUTOMOTIVE REPAIR CONTRIBUTOR
  • 16,098 POSTS
Any driveability issues? How long since a tune-up? Use a gage and check fuel pressure. P0159 isn't listed for v8, means insufficient activity for 02 sensor. P0174 says bank two is lean.
Jul 30, 2011 at 8:18 PM
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