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.
2011 Ford Expedition 2WD V8-5.4LFACTORY OEM SERVICE PROCEDURE
Knock Sensor: Service and Repair
Knock Sensor (KS)
Removal and Installation
1. Remove the intake manifold. For additional information, refer to Engine - 5.4L (3V) Removal and Replacement.
2. Disconnect the Knock Sensor (KS) electrical connectors.
3. Remove the 2 bolts and the 2 KS.
- To install, tighten to 20 Nm (177 lb-in).
4. To install, reverse the removal procedure.
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.
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.