Engine Speed & Position Signal Sensor (Crank Area)

This small electronic sensor is vital for Nissan engines because it tells the ECU exactly where the crankshaft is and how fast it is spinning. Without this data, the engine cannot time spark and fuel correctly. Think of it as the engine’s “heartbeat reader” ⚙️.

Why This Part Is Needed

Modern ignition and injection systems depend on a clean crank signal to control starting, idle stability, acceleration, and fuel economy. It also helps prevent misfires and keeps emissions under control ?.

How It Works

The sensor sits close to a toothed trigger wheel on the crank. As the teeth pass by, it generates a pulse signal (magnetic or Hall-effect). The ECU counts these pulses to calculate RPM and uses the missing-tooth pattern to find Top Dead Center for precise timing ?.

What Happens If It’s Broken

Common Symptoms

• Hard start or no start ❌
• Engine stalls when warm
• Jerking, misfire, weak acceleration
• Check Engine light + RPM drops to zero

If ignored, the car may cut out suddenly and leave you stranded. Replacing a failing sensor restores stable timing, smoother running, and reliable starts ✅.