p0171 code after manifold gasket change

Asked by brent Apr 08, 2020 at 12:26 PM about the 1997 Ford Expedition 4 Dr XLT 4WD SUV

Question type: Maintenance & Repair

How long can you run on the p0171 code before the damage is done and what
other items can be the problem after a smoke test showed a leak in the
manifold

1 Answer
70,275

Kelly answered 4 years ago

OBD II Trouble Code P0171 indicates that the oxygen sensor in bank 1 detected a lean condition (too much oxygen in the exhaust, or not enough fuel in the exhaust). On the Ford Expedition engine (V6/V8/V10) Bank 1 is the side of the engine that has cylinder #1. ... The MAF (Mass Air Flow) Sensor is dirty or faulty

Mark helpful

Your Answer:

Related Questions

  • p0171 code after manifold gasket change 1 Answer

    How long can you run on the p0171 code before the damage is done and what other items can be the problem after a smoke test showed a leak in the manifold

    1997 Ford Expedition 4 Dr XLT 4WD SUV

    -

    Maintenance & Repair

  • Code?!? 1 Answer

    My odometer said 666 and an upside down "A"? Is it throwing a code, or do I need an exorcism?

    1999 Ford Expedition 4 Dr XLT SUV

    -

    Maintenance & Repair

  • 01 expy 5.4 p0171 p0301 runs rough 23 Answers

    Last week our 2001 expedition started running rough during a rain storm. We took it home and parked it for a couple days to let it dry out. Still ran rough after drying but now had a check engine l...

    2001 Ford Expedition XLT 4WD

    -

    Maintenance & Repair

  • P0171 P0420 P0430 - Little enging power - 03 Expedition 1 Answer

    The 2003 Ford Expedition 4.6L 2WD idles fine when cold at about 1000 RPM, but upon warming the idle drops to 700 RPM. When the throttle is past 1/3 the power flattens out. The Freeze frame data from...

    2003 Ford Expedition

    -

    Maintenance & Repair

  • My 99 Expedition has a clogged heater core it only blows cold air. Will a clogged heater core cause a blown head gasket? 1 Answer

    The blown head gasket acurred after I installed a new water pump.

    1999 Ford Expedition 4 Dr Eddie Bauer 4WD SUV

    -

    Maintenance & Repair

Own this car?

Share your experience with others.

1997 Ford Expedition

Write a car review

Review another car

Shortcuts

Search Ford Expedition Questions

CarGurus Experts

  • #1
    Larry Sturgis
    Reputation
    5,240
  • #2
    T_S_T
    Reputation
    4,550
  • #3
    Gene Arnett
    Reputation
    2,710
View All

Know more, shop wisely

Search

Related Models For Sale

Used Chevrolet Tahoe
1,173 Great Deals out of 23,627 listings starting at $2,000
Used Chevrolet Suburban
574 Great Deals out of 12,598 listings starting at $2,588
Used Ford Explorer
2,315 Great Deals out of 56,951 listings starting at $1,800
Used Lincoln Navigator
255 Great Deals out of 8,888 listings starting at $1,000
Used GMC Yukon
723 Great Deals out of 12,622 listings starting at $1,588
Used Ford F-150
6,096 Great Deals out of 139,194 listings starting at $995
Used Toyota 4Runner
1,205 Great Deals out of 16,081 listings starting at $2,999
Used Dodge Durango
909 Great Deals out of 24,404 listings starting at $2,290

Used Cars for Sale

2024 Ford Expedition For Sale
22 Great Deals out of 16,425 listings starting at $43,400
2023 Ford Expedition For Sale
81 Great Deals out of 990 listings starting at $45,594
2022 Ford Expedition For Sale
142 Great Deals out of 1,386 listings starting at $32,998
2021 Ford Expedition For Sale
149 Great Deals out of 1,990 listings starting at $22,570
2020 Ford Expedition For Sale
132 Great Deals out of 1,368 listings starting at $18,988

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use. Content will be removed if CarGurus becomes aware that it violates our policies.