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Sensors

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How to Replace an Exhaust Gas Recirculation (EGR) Pressure Feedback Sensor
Exhaust gas recirculation (EGR) systems use a pressure feedback sensor to tell the powertrain control module (PCM) how much exhaust gas is flowing.
How to Replace a Transmission Position Sensor (Switch)
Transmission position sensors (TPS) switch ensures a car is in Neutral or Park when started and shuts the car down if it's not in the right gear.
How to Replace an Evaporator Temperature Sensor (Switch)
The air conditioning system has an evaporator temperature sensor that fails when there is no cold air or the air conditioning is inconsistent.
What Does the Rain and Light Sensor Warning Light Mean?
The rain and light sensor warning light indicates when there is an issue with the sensor system. It will remain deactivated until fixed.
How to Replace an EVP Position Sensor
The EGR valve is monitored by a valve position sensor. This sensor helps your car's EGR system to run more efficiently and better control emissions.
How to Replace an Oil Pressure Sensor on Most Cars
Oil pressure sensors fail if the sensor light blinks or stays on constantly when the pressure if acceptable or when the gauge is at zero.
How to Replace a Fuel Rail Sensor
The fuel system has a fuel rail sensor which fails when the engine operates erratically, has difficulty starting, or the Check Engine Light comes on.
How to Replace a Speed Timing Sensor
Some signs of a failed speed timing sensor include a Check Engine Light and poor performance. It's also known as the crankshaft position sensor.
How to Replace an Injector Control Pressure Sensor
Diesel engines have an injector control pressure sensor that fails when there is hard starting, decreased power, or an illuminated Check Engine Light.
How to Replace a Manifold Temperature Sensor
Signs of a failing manifold temperature sensor include rough idling and a rough running engine, and may result in a failed emissions test.
How to Replace a Refrigerant Pressure Sensor
The air conditioning system has a refrigerant pressure sensor that goes bad when the air conditioning does not work or only works intermittently.
How to Replace the Speedometer Sensor on Most Cars
The speedometer has a sensor that fails if the speedometer or cruise control do not work, the Check Engine Light comes on, or the vehicle loses power.
How to Replace a Washer Fluid Level Switch
The washer fluid level switch fails when the Windshield Fluid Warning Light stays illuminated or there are unusual noises coming from the washer pump.
How to Replace a Steering Angle Sensor
A steering angle sensor fails if the Traction Control Light illuminates, the steering wheel feels loose, or the vehicle drives differently.
How to Replace a Car Battery Temperature Sensor
The battery has a battery temperature sensor that fails when the Check Engine Light comes on, the battery voltage is low, or the RPM curve surges.
How to Replace an Exhaust Gas Recirculation (EGR) Temperature Sensor
Exhaust gas recirculation (EGR) temperature sensors monitor the EGR cooler's operation. One is on the exhaust manifold and one is near the EGR valve.
P0337 OBD-II Trouble Code: Crankshaft Position Sensor A Circuit Low Input
P0337 means that the crankshaft is suffering because of low voltage. This could be due to sensor not being aligned properly or electrical problems.
How to Replace a Camshaft Position Sensor
Camshaft position sensors determine the position of the camshaft in relation to the crankshaft to control the fuel injector.
How to Replace the Oil Temperature Sensor on Most Cars
Oil, as well as the oil temperature sensor, is crucial to the engine lubrication system. A bad sensor can lead to leaks and poor vehicle performance.
How to Replace a Yaw Rate Sensor
Yaw rate sensors monitor traction, stability, and the anti-lock braking system to alert you when the car tilts at an unsafe degree.

Related questions

Question
Check engine light comes on while driving. My vehicle started jerking while driving. I was told it may be the camshaft sensor.
Hi there. When your car is jerking around, this means that the engine is having a misfire and causing the engine to stumble making the vehicle seem to jerk around. Check the camshaft position sensor for any damage and if...
Question
Will not start.
The sensor will be the same. What you need to make sure of is that the new motor has the tone ring installed on the balancer. The same goes for the camshaft sensor. A missing tone ring is a very...
Question
Can a collision in the front of my car cause a mass air flow sensor to malfunction? I need to make a claim for the insurance.
Unless the sensor has been physically damaged by the accident you were in, it would be impossible to know if it was damaged by the accident or not. The MAF sensor is a common sensor to fail on these vehicles...
Question
Camshank sensor
There has never been a fuse or circuit breaker in the crankshaft sensor on any vehicle that I have ever worked on. If you are having a problem with the crankshaft sensor or engine problems that you need help on...
Question
Electrical fault with my car alarm.
Hi there. Car alarms come with different kinds of sensors that affect how they respond to activity around them. Car alarm systems also come with tilt sensors, which trigger the alarm if the car's position is moved. Check all of...
Question
Temperature gauge not reaching appropriate temperature.
When replacing thermostats, or if you are trying to diagnose a problem, the best thing to do is install the OEM (i.e., dealer supplied) thermostat. Assuming that the thermostat you got is "good" (i.e., opening at OEM specified temperature and...
Question
Engine cranks, but does not fire
A crankshaft position sensor is an electronic device used to monitor the position or rotational speed of the crankshaft. This information is used by engine management systems to control the fuel injection or the ignition system timing and other engine...
Question
Do I need a special tool to remove the knock sensor?
Hello. There does not appear to be any special tool required to remove the knock sensor on an 84 Corvette. Only the correct size socket should be needed in order to loosen and remove the sensor. The sensor is located...
Question
Car won't start or stay in park.
Hi there. The issue could be the shifter cable not adjusted properly or the transmission position sensor could have failed. If the transmission is not shifting into park, then check the shifter cable to see if its loose on the...
Question
Cranks but doesn't start and also I don't see the rpm move when I try to start, what should I do? - 2002 Nissan Altima
Hello - I suspect your crankshaft position sensorhas failed. This sensor provides the ignition system with timing information - when to fire each spark plug. This sensor is also the trigger for the tachometer, since it is counting engine revolutions...
Question
Driving down the road, the transmission stop pulling. Has code p0720. What sensor needs changing?
In the future, please include the model of Nissan and the motor size. This way we can be more certain we are giving you an accurate answer. The P0420 code has to do with the catalytic converter. It will...
Question
Changing the camshaft position sensor
You do not need to do anything special when replacing camshaft sensor. If you want a mechanic like one from YourMechanic to come and replace the cam sensor for you. You will need to clear the codes for the computer...
Question
Amber engine light came on. Mechanic said the fault was a knock sensor.
If your engine has any kind of noise in it that can cause an engine knock then it would also set the code for the knock sensor. The knock senor is used by the computer to adjust ignition timing for...
Question
the shop costed me 378 dollars to replace camshaft sensor for 2004 chrysler 300M. am i being ripped off?
The camshaft position sensor itself, for your application, costs at most $30 if you buy it using the usual 30% off coupon(s) at the national auto parts chains. Even if you pay full fare, that is buy the genuine OEM...
Question
Will not attempt to start. Engine has spark. Also noticed oil was in the intake tube.
Hi there. Check to see if the fuel injectors are working. You can back probe them with a digital meter and see if the voltage is being metered. If the injectors are working, then check the crankshaft position sensor and...
Question
Yes I have 1973 Chevy dump truck the temperature connecter coming from electric thermostat melted all the way to my dash.
Hi there. Check the temperature sensor on the engine. If the wiring melted off, then the sensor has caused a short to ground on or near the wire. This will heat up the wire and make it burn. If the...
Question
A/C is going crazy. The reading of the "outside temperature" resets itself. 2004 Land Cruiser
Hello - most likely, the outside air temp sensor has been damaged or ripped out. (They are often mounted down low just behind the front bumper, which makes them vulnerable to all sorts of things.) When the sensor is removed,...
Question
I was driving on the highway and I lost power and the car cut off. The car will not start back up and it has gas in it has coming through the gas line.
Hi there. Check the ignition system and see if the spark plugs are sparking. If the spark plugs are not sparking, then check for power to the ignition coil. If there is no power to the ignition coil, then check...
Question
Service advance trac light is on and I don't know why either please help
A traction control system diagnostic would identify the fault that has caused the warning light to set. Once the codes are read, I would first try resetting the light to see if maybe this occurrence is simply an artifact of...
Question
Where is the ambient air temperature sensor located in a 94 Lincoln town car
The ambient air temperature sensor is located in front of the a/c condenser in the center of the vehicle mounted just below the hood latch on the support bracket. The sensor will give temperature reading s from about -40 to...

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