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.
Pinpoint Tests O: Water in Fuel (WIF) Sensor: Introduction
2021 Ford Edge SE, 4WDSECTION Introduction
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NOTE:
Regeneration may occur during normal operation. During regeneration, diagnostic procedures may display biased values. If a regeneration occurs during diagnostic procedures, allow the process to complete before continuing diagnostics.
This pinpoint test is intended to diagnose the following:
- fuel system contamination
- harness circuits: GND, SIGRTN, WIF and VPWR
- WIF sensor (9T321)
Harness Side
| Circuit | Pin |
|---|---|
| WIF (Water In Fuel) | 1 |
| SIGRTN (Signal Return) | 2 |
| GND (Ground) | 3 |
Harness Side
| Circuit | Pin |
|---|---|
| WIF (Water In Fuel) | 24 |
| SIGRTN (Signal Return) | 44 |
RENDER: 1.0x
NO RELATED
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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.