How Do You Know if Your Crankshaft Position Sensor Is Bad?
(Updated on September 9, 2020)
The crankshaft position sensor is found in virtually every new auto on the road today. Its job is to runway the position of the crankshaft and the speed at which it is rotating. The crankshaft position sensor will then transmit this information to the engine command unit of measurement (ECU).
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Based on this information and the current operating conditions, the engine control unit volition make adjustments to the corporeality of fuel that gets injected into the internal combustion chamber. It will too take an impact on the timing of the ignition system also.
How a Crankshaft Position Sensor Works
The internal combustion engine of a vehicle contains a crankshaft and pistons. These two parts, along with others, allow the engine to outset up and produce the power needed to movement the vehicle.
Every bit fuel and air fire inside the combustion bedchamber, the vapors put pressure on the pistons. In one case that happens, the crankshaft transforms this pressure level into rotational energy. The crankshaft needs to be in the right position and rotating at the right speed to pull this off properly.
So in essence, the chore of the crankshaft position sensor is to detect the position of the crankshaft and the speed of its rotation.
Now, why is all this important? Well, this is all crucial information which the ECU needs to successfully manage the internal combustion process. As you may know, the internal combustion chamber requires the correct amount of fuel in conjunction with outside air to meet the demands of the engine.
The ignition system will then need to time the ignition of the air and fuel mixture simply right. Otherwise, information technology could jeopardize the performance of the engine.
Therefore, the crankshaft position sensor allows the engine control unit to receive accurate data virtually the crankshaft. That way, the vehicle's reckoner will instruct the fuel injectors to "inject" the precise corporeality of fuel needed in the chamber. Plus, it will control the timing of the ignition so that the mixture is ignited at the correct moment.
Come across Too: Symptoms of a Bad Mass Air Flow Sensor
Elevation five Bad Crankshaft Position Sensor Symptoms
If the crankshaft position sensor is not acting the fashion it is supposed to, then information technology will mean trouble for the operation of the engine and the vehicle.
Beneath are five of the nigh common signs of a bad crankshaft position sensor. In one case you recognize ii or more of these, yous can then take your vehicle to a mechanic knowing the culprit may simply be the sensor.
i) Irregular Stalling
The crankshaft position sensor is comprised of numerous wires which run to the engine control module and crankshaft. If whatsoever of these wires were to go damaged or worn out, the engine control unit of measurement would not receive the data signal from the sensor.
If you are driving your vehicle while this is happening, your engine may stall. Sometimes it will stall consistently while other times, the stalling will come up at irregular intervals. Yous may besides want to check the sensor itself and make certain that is not damaged either.
2) Difficult Starting Vehicle
When you have a faulty or damaged crankshaft position sensor, one of the first things you'll discover is that your vehicle will be difficult to start. The speed and position of your crankshaft need to exist just right if your engine is going to start properly.
If your engine control unit of measurement cannot receive accurate information virtually the crankshaft, then you volition have trouble starting your vehicle. In some cases, y'all won't be able to get-go the car at all.
3) Engine Vibration
When the position of the crankshaft is not accurately being monitored, this can spell trouble for the engine. The reason is that the engine will not be able to control its power, which tin cause it to vibrate profusely.
This problem should not be ignored because information technology could damage your motor mounts and other vital components that are continued to it.
4) Hesitation When Accelerating
When you lot step on the gas pedal to accelerate the vehicle, the engine control unit is supposed to receive information about the cylinders' position. Just if you have a bad crankshaft position sensor, in that location will be a delay in the time information technology takes for the engine command unit to receive this information.
That means that each time yous step on the gas pedal, there will exist hesitation in the acceleration instead of an immediate response.
v) Check Engine Low-cal
In that location are over a hundred reasons why the check engine light may come up on. 1 of those reasons is having a bad crankshaft position sensor.
If the engine control unit does not receive a proper signal from the sensor, the unit may think something is wrong and will automatically illuminate the check engine lite on the dashboard. Upon scanning for problem codes with an OBD2 scanner, y'all may come across crankshaft position sensor related codes such equally P0335 or P0340.
If you are experiencing any of these other symptoms in improver to the cheque engine light, and so that increases the likelihood that the crankshaft position sensor is to arraign. If yous practice non notice any other symptoms, so you'll need to accept a mechanic run a diagnostic test to figure out what is going on.
Crankshaft Position Sensor Replacement Cost
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When information technology comes time to supercede your crankshaft position sensor, expect for it to toll you somewhere between $120 and $260.
The part costs will only be around $40 to $120 depending on the vehicle and whether the new sensor is OEM or aftermarket. The labor price will be around $80 to $140 as it's commonly fairly piece of cake to accomplish although sometimes other parts need to be removed to get to it.
Other than the make and model of your vehicle, the total replacement job cost depends heavily on who does the job. Your best bet would be to research a couple independent auto repair shops and get quotes on the cost of replacement. While your local dealership would be happy to supervene upon a simply role like a sensor, look to pay a premium.
Source: https://oards.com/bad-crankshaft-position-sensor-symptoms/
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