Engine codes

CFORER

MEMBER
1999 CHEVROLET SUBURBAN
V8
4WD
AUTOMATIC
98,000 MILES

What should I look for when codes PO159 and PO174 come up?

Saturday, July 30th, 2011 AT 8:03 PM

1 Reply

JDL

MECHANIC
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.

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Engine codes

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