Ford Explorer P2198 code

5

Asked by May 14, 2016 at 12:28 PM about the 2003 Ford Explorer Eddie Bauer V6 4WD

Question type: Maintenance & Repair

Explorer is getting a P0174 and P2198 code

1 Answer

13,345

Sure, just a guess at this point but HEGO is Suspect!~~ Here's the complete follow through. Generally, you should begin troubleshooting with the lowest numbered code. There are quite a few items common to all the codes. Below, I have defined the code and what sets it. Then there is a list of causes. Unless you want to start shotgunning parts, I would use this list to check everything that can be checked. I would concentrate on fuel and induction systems. That being said, however, it is quite possible the O2 sensor for bank 1 is bad. P0171 - System too Lean (Bank 1) The Adaptive Fuel Strategy continuously monitors the fuel delivery hardware. The test fails when the adaptive fuel tables reach a rich calibrated limit. Refer to Section 1 , Powertrain Control Software, Fuel Trim for more information. Some of the causes for this are: Air Measurement System: MAF sensor (contaminated, damaged, malfunctioning, etc.) Fuel System: Fuel pressure regulator (leaking, malfunctioning, etc.). Fuel filter plugged, dirty. Fuel pump (weak, check valve leaking, etc.). Leaking/contaminated fuel injectors. Low fuel pressure or running out of fuel. EVAP canister purge valve leaking (when canister is "clean"). Fuel supply line restricted. Fuel rail pressure sensor (incorrect reading). Air Induction System: Air leaks after the MAF. Vacuum Leaks. PCV system (leak, valve stuck open, etc.) Improperly seated engine oil dipstick. P2198 - Lack of HO2S-21 Switch, Sensor Indicates Lean A HEGO sensor indicating rich at the end of a test is trying to correct for an over-lean condition. The test fails when the fuel control system no longer detects switching for a calibrated amount of time. P2198 have common causes: Electrical: Short to VPWR in harness or HO2S Water in harness connector Open/Shorted HO2S circuit Corrosion or poor mating terminals and wiring Damaged HO2S Damaged PCM Fuel System: Excessive fuel pressure Leaking/contaminated fuel injectors Leaking fuel pressure regulator Low fuel pressure or running out of fuel Vapor recovery system Induction System: Air leaks after the MAF Vacuum Leaks PCV system Improperly seated engine oil dipstick EGR System: Leaking gasket Stuck EGR valve Leaking diaphragm or EVR Base Engine: Oil overfill Cam timing Cylinder compression Exhaust leaks before or near the HO2S(s) Regards

Your Answer

Ford Explorer Experts

  • #1
    OJ
    Reputation
    11,240
  • #2
    Tom Demyan
    Reputation
    4,440
  • #3
    tennisshoes
    Reputation
    2,590
View All

Related Models For Sale

Used Jeep Grand Cherokee
1,050 Great Deals out of 84,334 listings starting at $1,200
Used Ford Expedition
349 Great Deals out of 17,665 listings starting at $1,989
Used Chevrolet Tahoe
854 Great Deals out of 44,853 listings starting at $1,980
Used Ford F-150
3,198 Great Deals out of 239,103 listings starting at $1,300
Used Dodge Durango
317 Great Deals out of 25,659 listings starting at $1,500
Used Toyota Highlander
566 Great Deals out of 37,523 listings starting at $2,450
Used Ford Escape
1,187 Great Deals out of 108,014 listings starting at $850
Used Toyota 4Runner
358 Great Deals out of 27,337 listings starting at $1,750
Used Honda Pilot
626 Great Deals out of 45,110 listings starting at $300
Used Nissan Pathfinder
487 Great Deals out of 27,851 listings starting at $2,250
Used GMC Yukon
624 Great Deals out of 23,429 listings starting at $1,200
Used Ford Explorer Sport Trac
47 Great Deals out of 1,766 listings starting at $1,650

Used Cars For Sale

2018 Ford Explorer For Sale
7,228 listings starting at $28,435
2017 Ford Explorer For Sale
170 Great Deals out of 41,355 listings starting at $22,896
2016 Ford Explorer For Sale
157 Great Deals out of 4,417 listings starting at $14,970
2015 Ford Explorer For Sale
380 Great Deals out of 8,008 listings starting at $11,499
2014 Ford Explorer For Sale
230 Great Deals out of 4,995 listings starting at $9,650

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.