Ford expedition crankshaft position sensor location

Dan Ferrell writes about do-it-yourself car maintenance and repair. He has certifications in automation and control technology. A failing camshaft position sensor CMP sensor can produce a confusing range of problems, depending on the way it fails and the model of the car:.

An intermittent or complete CMP sensor failure while on the road could be dangerous.

ford expedition crankshaft position sensor location

It could happen at any time: You are driving on the highway, moving along in fast traffic, when your engine suddenly loses power. There is nothing to do but watch in horror as a vehicle approaching at 70 miles an hour rear-ends you. Not a pretty picture, but it's happened many times. Here, we'll explore the symptoms of a bad camshaft position sensor and what you can do about it. But let's discuss first what the sensor does.

Your engine's cylinder head houses one or two camshafts—a shaft equipped with offset lobes—to operate the intake and exhaust valves.

The crankshaft, located in the engine block, drives the camshaft using gears, a timing chain, or a timing belt. To determine which cylinder is in its power stroke, your car's computer monitors the rotating position of the camshaft relative to the crankshaft position using a camshaft position CMP sensor.

It uses this information to adjust the spark timing and the operation of the fuel injectors. Thus, the CMP sensor affects fuel economy, emissions control, and engine efficiency. The two most common camshaft sensors you'll see are the magnetic and Hall-effect types. Both transmit a voltage signal to an electronic control module or to the car's computer.

The magnetic type produces its own AC alternate current signal a sine waveand you can identify it by its two wires. The Hall-effect type uses an external power source to produce a digital signal a "square wave," on-or-off and has three wires. Note: If you are new to all this, you should know that the camshaft position sensor is a different part from the crankshaft position sensor. Just like every part or component in your car, the CMP sensor will eventually stop working when it's reached the end of its service life, because an internal part, wire, or related component has failed.

The symptoms your engine may experience at this point can vary, depending on the type of sensor failure: for example, a problem in the circuit, the connector, the sensor itself, or a related component.

Once your car's computer detects a CMP sensor failure, it will trigger the engine light and store a diagnostic trouble code DTC in its memory see the table below for common camshaft position sensor trouble diagnostic codes.

As you may expect, the specific location of the camshaft position sensor varies by a vehicle's make and model. On most models you can find the sensor somewhere around the cylinder head.

Some GM models may have a special compartment for the sensor. Depending on the specific model of your car, your engine may have one or more cam sensors. If you need help finding the sensor scheck the vehicle service manual for your particular model.Why don't fictional characters say "goodbye" when they hang up a phone?

If we can't tunnel through the Earth, how do we know what's at its center? All Rights Reserved. The material on this site can not be reproduced, distributed, transmitted, cached or otherwise used, except with prior written permission of Multiply. Hottest Questions.

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Previously Viewed. Unanswered Questions. Crankshaft Sensors. Wiki User For the 5. Asked in Car Fuses and Wiring Vauxhall cavalier wiring for a towbar? As the Cavalier is not CAN bus controlled you can connect directly to the car's wiring loom no Earth Stop lights I need to check the vacuum hoses but not sure where all are?

It is most likely the EATC module that controls the temperature in the vehicle. I advise you to try and fix this problem your self. This may or may not work for you and it will not hurt to change the parts either way.

It seems that the O rings found in the control unit dry out or even crack over time. This is what needs to be replaced to eliminate the vacuum leak. Asked in Ford Expedition Eddie Bauer How do the front airbags discharged on a Ford Expedition Auto 4wh dr Eddie Bauer 54l specs for discharge vehicle speed can they go off if the vehicle is standing running but not moving etc?The crankshaft position sensor is an engine management component found on virtually all modern vehicles with internal combustion engines.

It monitors the position and rotational speed of the crankshaft and sends the information to the engine control unit so it can make appropriate adjustments based on operating conditions.

The crankshaft speed and position are some of the most important parameters used in engine management calculations, and many engines cannot run if the crankshaft position sensor is not providing an accurate signal.

Problems with the crankshaft position sensor can be linked to several issues. Overheating Engine. The excessive build-up of heat in the engine can lead to crankshaft sensor damage by melting the plastic covering.

Ford Crankshaft Position Sensor Location

Circuitry Problems. Faulty voltage or loose, worn-out, or damaged wiring can disrupt the signals sent to and from the crankshaft sensor, causing it to have issues. Driving with a failing crankshaft position sensor can be difficult and potentially dangerous. It could lead to long-term vehicle damage and expensive repairs, or even stop the car from working at all. Usually, a problematic crankshaft position sensor will produce any of the following 7 symptoms that alert the driver of a potential problem that should be serviced.

ford expedition crankshaft position sensor location

The most common symptom associated with a bad or failing crankshaft position sensor is difficulty starting the vehicle. The crankshaft position sensor monitors the position and speed of the crankshaft and other parameters that play an important role when starting the engine. If the crankshaft position sensor is having a problem, the vehicle may have intermittent starting issues or not start at all. Another symptom commonly associated with a problematic crankshaft position sensor is intermittent stalling.

If the crankshaft position sensor or its wiring have any issues, it can cause the crankshaft signal to be cut off while the engine is running, which can cause the engine to stall. This is usually a sign of a wiring problem. However, a bad crankshaft position sensor can also produce this symptom.

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Another issue of a potential problem with the crankshaft position sensor is an illuminated Check Engine Light. A Check Engine Light can also be set off by a wide variety of other issues.

Having the computer scanned for trouble codes is highly recommended. Slow or uneven acceleration can result from a lack of accuracy and make it difficult to maintain a constant speed. Should you feel or hear a brief stutter in the engine, it may be a sign of misfiring cylinders from a bad crankshaft position sensor. A failing crankshaft position sensor cannot provide the right information about piston positioning in the engine, causing a cylinder to misfire.

This could also occur from faulty spark plug timing, but if the spark plug checks out, then the crankshaft sensor is likely the source. Another sign of a crankshaft position sensor problem is rough idling.

While idling at a red light or otherwise stopped, you may notice the engine grinding or vibrating. Any out-of-the-ordinary vibrations should be inspected by a mechanic as soon as possible. Lacking accurate timing information from the crankshaft position sensor, fuel injectors won't pump gas into the engine efficiently.

The engine will use more gas than it needs on short and long drives, reducing overall fuel economy. Have a mechanic inspect the sensor — as insufficient fuel economy can occur from other issues as well. The crankshaft position sensor is critical to proper engine functionality and performance due to the vital signal it provides for engine calculations.Why don't fictional characters say "goodbye" when they hang up a phone?

If we can't tunnel through the Earth, how do we know what's at its center? All Rights Reserved. The material on this site can not be reproduced, distributed, transmitted, cached or otherwise used, except with prior written permission of Multiply. Hottest Questions. Previously Viewed. Unanswered Questions. Crankshaft Sensors. Ford Expedition Eddie Bauer. Where is the crank position sensor located on 5. Wiki User Where is the crank position senson located on the car.

Asked in Crankshaft Sensors, Ford F Where is the crank position sensor located on a ford xl 5. The crank position sensor is located by the crank shaft on a ford xl 5. Asked in Crankshaft Sensors Where is the crank position sensor located on a tacoma?

Should be by crank pulley. I can not find where is located the position of sensor crank of nissan sentra 2. The crank position sensor is located on the front of the engine, behind the lower crank pulleys. The Chevrolet Alamo crank shaft position sensor is located on the back of the engine. You will need to remove the rear engine cover in order to access the crank position sensor.

The Chevrolet Malibu crank position sensor is located on the back of the crankshaft.The crank sensor on your 4. You don't need a scan tool to test the Ford 4. TIP 1: The crank sensor is located on the timing chain cover. The battery must have enough reserve power to crank the engine easily for several seconds. TIP 3: You'll need to jack up the vehicle to gain access to the crank sensor.

Use a jack stand to hold the car up in the air. Do not trust the jack! Wear safety glasses to protect your eyes from falling debris. Think safety all of the time! TIP 4: When the crank sensor goes bad, you'll get a no-spark no-start condition. So, if you're getting spark from the ignition coil pack or the Coil-On-Plug ignition coils. The crank sensor is one of the most critical components to get the engine in your Ford car pick up, SUV, van started.

Since it provides the signal the PCM needs to start injecting fuel and start creating spark. Page 1 Page 2 Page 3. This article will walk you thru' the whole thing step by step. Contents of this tutorial:. All Articles: 4. Applies To:. Ford Vehicles:. Do NOT follow this link or you will be banned from the site!Our mobile mechanics offer services 7 days a week. Upfront and transparent pricing. Average rating from customers who received a Camshaft Position Sensor Replacement.

Learn More. Our certified mobile mechanics can come to your home or office 7 days a week between 7 AM and 9 PM. This computer system works with sensors and other devices to keep the engine running.

With data from the camshaft position sensor CPSthe fuel injectors know when to fire. When the sensor malfunctions, the computer does not know when to fire the injectors and may not fire them at all.

This sensor is used in conjunction with the crankshaft position sensor to control ignition timing. It is common for heat and oil leaks to cause this sensor to fail, due to where the sensor is located. Because it sends information to the camshaft, when the sensor begins to fail your engine will begin to have trouble. Your engine may have a hard time turning on, staying on, idling, or running smoothly.

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Your Check Engine warning light should illuminate as well. The camshaft position sensor provides valuable information about the camshaft position to the computer management system. The computer system uses the information from the position sensor to determine when to inject more fuel.

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Symptoms of a Bad or Failing Crankshaft Position Sensor

See availability. Keep in mind: Damage to the camshaft position sensor is often caused by oil leaks; if this is the case, you may need another part of your car replaced or repaired. When the camshaft position sensor is replaced, the alignment of the timing belt should be monitored so that no fluids leak onto the position sensor mounting area.

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Some camshaft position sensors will need to have their software updated when they are installed. Timing belts, mass air flow sensors, and crankshaft position sensors can all trigger the trouble code for the camshaft position sensor.

How it's done: Scan test computer for trouble codes. Pinpoint tests as per flow charts. Remove and replace Crankshaft Position Sensor. Clear trouble codes. Check for proper operation and test drive car.You need to keep one very important thing in mind: When the crank sensor fails goes badthe most obvious symptoms is a Cranks but Does Not Start condition due to no spark and no fuel injection.

With a bad crank sensor on your Ford 4. The crank sensor on the 4. Remember, the battery must be fully charged for this test to produce an accurate result. Well, because the strength of crank sensor's signal, that you'll be measuring with your multimeter, depends on the amount of RPMs your engine is turning as it's cranking. The following test steps assume that you 4.

ford expedition crankshaft position sensor location

OK, this is what you need to do:. Using a wire-piercing probe or another appropriate tool, probe the number 1 and number 2 wires of the crank sensor with the multimeter test leads. To see what a what wire piercing probe tool looks like, click here: Wire Piercing Probe. When everything has been set up and you're a safe distance from the engine, have your helper crank the engine as you observe the multimeter's AC Volts readings.

If the crankshaft position CKP sensor is working correctly, the multimeter will register an an oscillating voltage between 0. Now, to be a bit more specific: your multimeter will not register a steady AC voltage. Instead, the reading will jump between 0. Alright, let's find out if you have a bad crank sensor on your hands or not. If you have confirmed that the crank sensor is OK but your Ford still doesn't start, take a look at the following tutorial for more testing suggestions:.

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Ford Expedition Camshaft Position Sensor Replacement at your home or office.

You can verify this by using a noid light to check for the fuel injector pulses. If the fuel injector pulses are present, the crank sensor is OK. No spark to any of the 8 engine cylinders. You can verify this by using a spark tester and checking each spark plug wire or COP coil.

If spark is present even if it's just at one cylinderthe crank sensor is OK. OK, enough reading, let's get testing!


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