In this video, you will see the complete process of locating and replacing the Crankshaft Position (CKP) sensor on a Ford Fusion equipped with the 2.0L EcoBoost turbo engine. If your engine is cranking over rapidly but refuses to start, stalls out out of nowhere while driving, or drops into a severe misfire with a flashing check engine light, this visual guide shows you exactly where to look to find the sensor and how to swap it out.
How this video helps you: The CKP sensor monitors the exact rotational speed and position of the crankshaft so the engine computer knows exactly when to fire the spark plugs and open the fuel injectors. On the 2.0L EcoBoost engine, this sensor is located down low on the passenger side of the engine block. It is positioned right next to the crank pulley (harmonic balancer), reading a trigger wheel behind it. Because it is completely hidden from above by the alternator and turbo plumbing, and shielded from the side by plastic body panels, you cannot see it from a normal engine bay view. This video points directly to its exact location so you can see it clearly. You will see how to drop the passenger-side front wheel and the inner fender splash shield to open up a direct line of sight, and how to safely unbolt it without damaging the delicate sensor tip.
đź’ˇ CRITICAL CALIBRATION NOTE: The crankshaft position sensor on this EcoBoost engine is highly sensitive to its mounting gap distance. When installing the new sensor, do not just slam the bolt down tight instantly! The sensor bracket has slightly slotted holes for adjustment. If the sensor is misaligned even by a millimeter, it can cause ignition timing errors or a permanent crank-no-start condition. Ensure it sits perfectly square, and clean any metallic debris or rust off the mounting surface before bolting it down.
Common symptoms of a bad Crankshaft Position Sensor: The CKP sensor is the primary heartbeat sensor for the entire engine network. When its internal magnetic pickup coil shorts out or breaks down from constant engine heat, it causes these classic issues:
- Engine Cranks But Will Not Start: The starter motor spins the engine over perfectly fast and strong, but the car completely refuses to catch and fire up because the computer has cut off all fuel injection and spark delivery due to a missing RPM signal.
- Sudden Stalling While Driving: The engine runs beautifully until it warms up completely, then suddenly dies out of nowhere while you are driving down the road—almost as if someone turned off a light switch. After letting the car cool down for 20-30 minutes, it might mysteriously start back up again.
- Check Engine Light & CKP Fault Codes: A breakdown in the sensor circuit or an erratic signal will instantly trigger the engine light, storing diagnostic trouble codes like P0335 (Crankshaft Position Sensor A Circuit Malfunction) or P0339 (Circuit Intermittent).
- Severe Engine Misfires & Shaking: If the sensor drops data pulses intermittently, the ignition timing will jump erratically, causing the engine to stumble, lose power, and vibrate violently under load.
- Intermittent Tachometer Drop: While driving or cranking, you will notice the RPM needle on your dashboard instrument cluster drops flat to absolute zero, even though you can hear the engine physically turning over.
Watch the video to see the exact location inside the wheel well and replace your crankshaft sensor safely!