Skip the auto shop - Our mechanics make house calls
  1. Home
  2. Articles
  3. How to Replace a Speed Timing Sensor

How to Replace a Speed Timing Sensor

speed timing sensor

The speed timing sensor, also known as a crankshaft position sensor, is one of many sensors your car’s computer relies on for input. The computer receives information on the engine and outside temperature as well as vehicle speed and, in the case of the speed timing sensor, engine speed. The computer adjusts the fuel mixture and timing based on these inputs. The speed timing sensor is mounted directly to the engine block and and utilizes a magnetic field to read a toothed gear on the crankshaft to determine which cylinder is about to fire and how fast the engine is spinning. A failed speed timing sensor can cause issues such as an illuminated Check Engine Light, poor performance, and even a crank but no-start condition.

Part 1 of 2: Removing the speed timing sensor

Materials Needed

common speed timing sensor location

Step 1: Locate the speed timing sensor. The speed timing sensor is bolted to the engine. It can be on either side of the engine, or up front near the crankshaft pulley.

It is commonly secured in place with one screw but can have two or three.

Step 2: Remove the sensor. Making certain the key is in the off position, unplug the electrical connector to the sensor and remove the mounting bolt. The sensor should just pull out.

  • Tip: Most sensor housings are made of plastic which can become brittle over time. If the sensor is located in the engine block and does not pull out easily, use two small flat-head screwdrivers to evenly pry the sensor out.

sensor located near crank pulley

Step 3: Mount the new sensor. The sensor may have an o-ring seal if mounted into the block. Smear a little oil on the seal with your fingertip before inserting the sensor into the block.

Secure the sensor and plug the connector in.

negative battery terminal disconnected

  • Note: Some vehicles may self-clear any fault codes once the new sensor is installed and the engine is started. Others may not. If you do not have a fault code reader available, you can try disconnecting the negative battery terminal for 10-30 minutes. If that does not work, you can visit your local auto parts store and they may be able to clear the code for you.

If your Check Engine Light is on or you need assistance replacing your speed timing sensor, contact YourMechanic today and a mobile technician will come to your home or office.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
Icon-warranty_badge-02

Skip the repair shop, our top-rated mechanics come to you.

At your home or office

Choose from 600+ repair, maintenance & diagnostic services. Our top-rated mechanics bring all parts & tools to your location.

Fair & transparent pricing

See labor & parts costs upfront, so you can book with confidence.

12-month, 12,000-mile warranty

Our services are backed by a 12-month, 12,000-mile warranty for your peace of mind.

Get A Quote

Need Help With Your Car?

Our certified mobile mechanics make house calls in over 2,000 U.S. cities. Fast, free online quotes for your car repair.

GET A QUOTE

More related articles

Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
Auto Safety Tips
Driving is more than a way to get from point A to point B. Owning and driving a car can also be a highly enjoyable experience. Whether a person is driving...


Related questions

Q: Car will start but will not go into drive or reverse. It revs up just fine, transmission was not slipping. Rear tire was covered in fluid.

Hello. I would need to know what kind of vehicle this is to be able to help you with specifics. From what you are explaining though it sounds like a transmission failure. When there is a transmission problem the vehicle...

Q: My car can't change gears on my automatic Audi

This may be a sign of a faulty transmission control solenoid. As you may know, automatic transmissions use pressurized hydraulic fluid to change gears. Every time a gear change is required, the car's computer activates a transmission solenoid, which directs...

Q: New motor, ran good one week but now will not start. Changed multiple sensors. It will try and start with the throttle body wide open

Hi there. The first thing you could do is check all fuses. On some vehicles, for example, the fuse to the power door lock provides power to a module that initiates a "start" signal to the PCM. Although you do...