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 MANUALSFORD2005ECONOLINE E150, VAN CARGO, 5.4 LREPAIR AND DIAGNOSISENGINE PERFORMANCETESTING & DIAGNOSISENGINE CONTROLS - POWERTRAIN DTC CHARTS & DESCRIPTION (EXCEPT DIESEL & HYBRID)DIAGNOSTIC TROUBLE CODE (DTC) CHARTS AND DESCRIPTIONSDTC P1131: LACK OF HO2S-11 SWITCH, SENSOR INDICATES LEAN
2005 Ford Econoline E150, Van Cargo, 5.4 L
DTC P1131: Lack of HO2S-11 Switch, Sensor Indicates Lean
2005 Ford Econoline E150, Van Cargo, 5.4 LSECTION DTC P1131: Lack of HO2S-11 Switch, Sensor Indicates Lean
P1131 - LACK OF HO2S-11 SWITCH, SENSOR INDICATES LEAN
| Description: | A heated oxygen sensor (HO2S) indicating lean at the end of a test is trying to correct for an over-rich 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 P1130 . | ||
| Diagnostic Aids: | |||
| Application | Key On Engine Off | Key On Engine Running | Continuous Memory |
| All | - | GO to H: Fuel Control STEP H16. | GO to H: Fuel Control STEP H16. |
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.