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Crankshaft Position Sensor

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Your car houses several sensors that help in its efficient operations. One of the most familiar sensors is the Crankshaft Position Sensor. As its name implies, this sensor keeps track of the position as well as the rotational speed of the crankshaft. You might be asking why this could possibly be necessary. Well, this data is vital for the car's computer to regulate the ignition system timing and other vital engine operations. Manual adjustment of these components is a thing of the past thanks to this crank sensor. It can be found along the main crank pulley, the flywheel, or on the crankshaft. You can enjoy excellent drivability as long as this sensor is in excellent condition. A typical crank sensor is usually made up of magnets and an inductive coil. These components will undoubtedly develop rust and other forms of damage that will make the whole sensor somewhat inefficient. This is a scenario that you must be ready for. You can look for a replacement now if you want; at least you'll have one ready in case the stock Crank Position Sensor in your ride gives up. Our online shop Auto Parts Warehouse offers an extensive selection of crankshaft position sensors for any make and model of vehicle. Our crank sensors are designed as direct-fit OE replacement, so you definitely won't have a hard time installing it. What are you waiting for? Place your orders now!

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Getting a New Crankshaft Position Sensor

What does the crankshaft position sensor do?

This device, also known as an engine speed sensor, monitors the position and rotational speed of your crankshaft. By doing so, it provides your engine control unit the information it needs to properly time certain operations likeinjecting fuel and triggering spark plugs.

When should a crankshaft position sensor be replaced?

A faulty crankshaft position sensor means your engine will not be able to run efficiently, and you will experience problems like cylinder misfires, difficulty accelerating, and, in worst cases, being unable to start your vehicle or the engine abruptly failing. However, before getting a replacement, we recommend going to any auto parts chain store and having them read the codes in your vehicle's computer with a scanner. This will determine if the problem is really with your sensor and not from any other component.

Which crankshaft position sensor should be used?

You will need to refer to your vehicle's owner manual in order to find out what specific crankshaft position sensor is compatible with your vehicle. However, there are generally two types of crank sensors: magnetic field (also known as variable reluctance) and Hall Effect.

The magnetic type works by having a strong magnet mounted near the crankshaft, in which several pins are placed at an equal distance apart. The magnet creates a constant magnetic field, which fluctuates when the crankshaft spins and the pins rotate. The magnetic fluctuations produce alternating current signals, the frequency of which gives your engine control unit the information it needs to control timing.

The Hall Effect sensor uses notches on the crank to disrupt its magnetic fieled. This causes the sensor to switch onand off, this giving a digital signal to your engine control unit.

Both types are highly successful sensor systems. Generally however, Hall Effect sensors are more complex and have smoother operational function while magnetic field sensors are capable of withstanding higher temperatures.

What other factors are considered in choosing a crankshaft position sensor?

  • Installation - If your sensor is located on the side of the engine, chances are that you will need to install a new rubber O-ring. See if you can order a replacement package that also includes new O-rings as well as other components you may need for installation.
  • Heat Resistance - The plastic casing of crankshaft sensors have been known to melt or crack under extreme engine temperatures. A good range of temperature tolerance would be from -40 degrees Fahrenheit to 300 degrees Fahrenheit.
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Replacing Your Crankshaft Position Sensor

Also known as an engine speed sensor, your crankshaft position sensor monitors the position and rotational speed of your crankshaft. This enables your engine management system to properly time certain operations like injecting fuel and triggering spark plugs. Without this component, your engine will not run efficiently, and you will experience some of these problems:

  • Difficulty accelerating
  • Multiple cylinder misfires
  • Vehicle bucks and surges
  • Inability to start or idle

You will also notice that the "Check engine" light is on. To be sure the problem is with your crankshaft position sensor, we recommend going to any auto parts chain store and having them read the codes in your vehicle's computer with a scanner. Some stores may even do this for free.

A malfunctioning crankshaft position sensor should be replaced immediately.

Here's what you'll need:

  • Screwdriver or socket wrench (depending on the retaining bolt)
  • Rubber O-ring (optional)
  • Paper spacer (optional)
  • Replacement crankshaft position sensor
  • Vehicle owner manual
  • Safety gloves

And here are the steps:

  1. Disconnect your battery to prevent any electrical malfunction.
  2. Find your crankshaft position sensor. Common places are the front, rear, or side of the engine, behind the crankshaft pulley, or under the timing cover. Your vehicle's owner manual should tell you exactly where it is.
  3. Disconnect the three wires leading to your crankshaft sensor. Keep track of the wires and how they were connected to the sensor. You will need to reconnect them in the same way with your replacement sensor.
  4. Remove any retaining bolts then lift crankshaft position sensor off the engine.
  5. Install your replacement sensor and connect the three wires. It should lock into position without the need for any adjustments. You may need to install the rubber O-ring if the sensor is on the side of the engine (do not re-use the old O-ring). If any adjustment is necessary, use the paper spacer on the end of the sensor.
  6. Tighten any retaining bolts firmly. Take care not to over tighten them for this may damage the sensor.
  7. Reconnect your battery.