Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSFORD2004ECONOLINE E150, VAN CARGO, 4.6 WREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCETESTING & DIAGNOSISENGINE CONTROLS - POWERTRAIN DTC CHARTS & DESCRIPTIONS - CNG, FLEX-FUEL & GASOLINEDIAGNOSTIC TROUBLE CODE (DTC) CHARTSP2198 - LACK OF HO2S-21 SWITCH, SENSOR INDICATES RICH
2004 Ford Econoline E150, Van Cargo, 4.6 W
P2198 - Lack Of Ho2S-21 Switch, Sensor Indicates Rich
2004 Ford Econoline E150, Van Cargo, 4.6 WSECTION P2198 - Lack Of Ho2S-21 Switch, Sensor Indicates Rich
P2198 - LACK OF HO2S-21 SWITCH, SENSOR INDICATES RICH
| Description: | A Heated Oxygen (HO2S) 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. | ||
| Possible Causes: | See the possible causes for DTC P2195. | ||
| Diagnostic Aids: | - | ||
| Application | Key On Engine Off | Key On Engine Running | Continuous Memory |
| Dedicated NGV | GO to HA: Natural Gas Fuel Control STEP 9 | GO to HA: Natural Gas Fuel Control STEP 9 | GO to HA: Natural Gas Fuel Control STEP 9 |
| All Others | GO to H: Fuel Control STEP 22 | GO to H: Fuel Control STEP 22 | GO to H: Fuel Control STEP 22 |
RENDER: 1.0x
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.