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The Green Spark Plug Company£27.41Visit shop Ngk Crankshaft Engine Speed Sensor Chc3-A502 / 81501 Hall Effect Type By New Ngk-Chc3-A502
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The NTK Crankshaft Position Sensor (81501) is designed for automotive technicians and DIY enthusiasts looking to restore precise engine timing and reliable ignition performance. By delivering accurate speed and position data to the vehicle control system, this sensor ensures optimal engine efficiency and smooth operation; however, users must verify exact vehicle compatibility against their specific make and model before starting the installation process.
| Model Part Number | 81501 |
|---|---|
| Brand | NTK |
Always cross-reference the NTK part number 81501 against your vehicle's specific make, model, year, and engine code provided by your owner's manual or a certified parts catalog.
In most cases, the sensor is plug-and-play. However, some vehicles may require a 'crankshaft position variation relearn' procedure using a diagnostic scan tool after replacement.
Yes, but checking for resistance or voltage output requires specific technical data for your vehicle. Consult a professional mechanic if you are unsure of the values.
The seal is critical to prevent oil, moisture, and road grime from entering the internal electronics, which would otherwise cause signal failure and sensor corrosion.
If the bolt is corroded or damaged, it is recommended to replace it to ensure the sensor remains securely mounted against the engine block.
Verify the sensor is seated at the correct depth and the electrical connector is fully latched.
Clear the fault codes from the ECU using an OBD-II scanner and verify the wiring harness for continuity.
Check for loose mounting bolts or debris covering the sensor face that might be interfering with the magnetic signal.
Before beginning installation, consult your vehicle's service manual to locate the sensor, which is typically found near the crankshaft pulley or the transmission housing. Ensure the engine is cool to the touch to prevent burns. Disconnect the negative battery terminal to avoid short circuits. When installing the 81501, ensure the sensor is seated correctly in the mounting hole and the connector is clicked firmly into place. Avoid using excessive force or lubricants unless specified by your vehicle's manufacturer. Regularly inspect the wiring harness leading to the sensor for signs of heat damage or fraying during routine maintenance.
