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Category: Sensor

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September 26, 2026 BY
IN Sensor

Speedometer Sensor Replacement

As its name implies, the speedometer displays your vehicle’s real-time speed. Most speedometers are electronic. An electronic speedometer measures vehicle speed with the help of a speedometer sensor. This sensor, usually located at the transmission, detects the drive shaft’s rotational speed. The sensor delivers a corresponding series of pulses to a computer, which then turns these pulses into the numerical figure the speedometer indicates. So when the speedometer sensor becomes faulty, the speedometer becomes unreliable.

 

Your replacement speedometer sensor needs to be specific to your make and model, or else it might be inaccurate. A VIN is required to ensure the correct match.

 

Check the operation of speedometer. | Scan the computer system in the car for codes. | Test the vehicle speed sensor. | Replace the vehicle speed sensor if faulty. | Recheck the operation of speedometer.

 

There’s no need to be proactive with your speedometer sensor, as your car will quickly let you know when it fails. When the speedometer sensor malfunctions, the Check Engine warning light should come on, and your vehicle’s cruise control will stop working. The speedometer may also stop working, or it may become noticeably inaccurate.

 

A speedometer sensor measures the rate at which the vehicle’s driveshaft is rotating; this data is sent to the vehicle’s computer, where it is converted into a number and displayed on the speedometer. When the speedometer sensor fails, there is no line of communication to your speedometer, and you won’t be able to view how fast you’re driving.

September 26, 2026 BY
IN Sensor

Throttle Position Sensor (TPS) Replacement

For a car to run smoothly, it needs the proper mixture of air and fuel. The amount of air in the engine is controlled by the air intake system. A throttle body is part of the air intake system that helps control the amount of air that gets into the engine. The throttle body has a throttle plate. If the plate is closed, it prevents the air from getting into the engine. When you push the gas pedal, it opens the plate, allowing the air to enter the engine. The amount of air depends on the position of the plate, which is controlled by the gas pedal. The harder you push the gas pedal, the wider the plate will open, and more air will flow to the engine. This means more power and more speed. The throttle position sensor reports the position of the gas pedal to the computer in your car (Engine Control Unit). The computer then determines the position of the throttle plate. It also calculates the amount of air flow to the engine and the amount of fuel to be injected for the required ratio of air-fuel mixture. The throttle position sensor also controls the shifting of the gears. If this sensor stops working, the car’s computer will not be able to calculate the right amount of fuel to be injected in the system. It may not be able to change the gears. Your car will not get the right amount of power. It may not even start. The Check Engine light may come on.

 

When the throttle position sensor is repaired or replaced, it will need to have the minimum idle speed reset to factory specs, and the trouble codes will need to be cleared. | When a new throttle position sensor is placed in your vehicle, it should be checked for software updates.

 

Scan the computer system for codes. | Test the throttle position sensor and related wiring. | Remove and replace the throttle position sensor if found faulty. | Clean the carbon from throttle body. | Re-install throttle body and reset minimum idle speed to factory specs. | Clear trouble codes and check for proper operation. | Test drive vehicle.

 

If you notice that the gears are not changing properly, get the throttle position sensor (TPS) inspected. A good mechanic will clean the throttle body during a tune-up. If the Check Engine light is on, get the car inspected as soon as you can.

 

Your vehicle depends on an optimal mixture of air and fuel in order to run optimally. The amount of air that enters the engine is controlled by the air intake system. The faster your engine is moving, the more air it needs, so your air intake system is in tune with your gas pedal. Your throttle position sensor is constantly sending information about your gas pedal to the vehicle’s engine control unit. The computer then chooses the optimal position for the throttle plate, which is the part of the air intake system that lets air into the engine. When the throttle position sensor malfunctions, the engine control unit has no information about the gas pedal, and the throttle plate is not utilized. As a result, your vehicle will not get the right amount of air into the engine, and your engine will lose power and run very poorly. In some cases, this will keep your vehicle from being able to change gears.

September 26, 2026 BY
IN Sensor

Throttle/Accelerator Pedal Position Sensor Replacement

On older vehicle designs, a simple throttle cable connects the accelerator pedal to the engine and controls the amount of fuel delivered to the engine. However, with fuel injected systems, that has changed. Newer engines now use electronics to control the amount of fuel sent to the engine based on accelerator pedal movement. This is the job of the accelerator pedal position sensor. It’s mounted to the gas pedal, and essentially translates the movement of the pedal (speed and position) into voltage, which tells the car’s computer how much fuel to supply for engine acceleration.

 

It’s impossible to check the operation of the accelerator pedal position sensor visually as it requires a voltmeter and an understanding of the proper voltage output range. | It’s possible for an accelerator pedal position sensor to operate intermittently. | A discrepancy in voltage will put the computer into “limp” mode, which provides significantly reduced power to prevent damage.

 

The throttle pedal position sensor is verified that it needs to be replaced. The throttle trim cover is then removed to access the sensor. | The defective throttle pedal position sensor is disconnected and removed. | The new throttle pedal position sensor is installed onto the firewall and reconnected. | The engine is started and the throttle pedal position sensor is tested for operation. The trim panel is then reinstalled. | The vehicle is road tested to ensure proper operation of the throttle pedal position sensor.

 

There is no set service or replacement period for your accelerator pedal position sensor. If you suspect a problem with your accelerator pedal position sensor, have one of our expert mechanics diagnose the system.

 

Because the accelerator pedal position sensor tells the car’s computer how quickly you’re depressing the accelerator pedal and controls the supply of fuel to the engine, replacement is very important. While your car will continue to operate even if there is a problem with the sensor, it will do so with limited capacity. Our experienced mechanics will use a voltmeter to determine sensor operation and diagnose the problem accurately. Have a faulty accelerator pedal position sensor replaced immediately.

September 26, 2026 BY
IN Sensor

Top Dead Center (TDC) Sensor Replacement

Every engine, whether a single cylinder engine or a V8 engine, has top dead center. This position is a reference point for engine timing and indicates when a spark plug should fire, igniting the fuel the cylinder’s combustion chamber. Top dead center is when the piston is at the very top of its compression stroke. At this position, the intake and exhaust valves in the cylinder head are closed and the air-fuel mixture is compressed in the cylinder. The TDC sensor monitors a reference point on the camshaft that indicates where top dead center is on a cylinder, usually cylinder number one. It sends a signal to the engine control module which, in turn, communicates to send a spark to the cylinder at top dead center. The spark ignites the fuel and the power stroke begins as the piston is forced downward. The TDC sensor is an electrical component and is prone to failure due to corrosion, cracking, or wearing out. If that occurs, the engine control module may not receive a correctly timed signal and the spark may be sent to the wrong cylinder at the wrong timing, causing your engine to run rough or not run at all.

 

The top dead center (TDC) sensor is integral to the proper timing of your vehicle. If it is installed incorrectly, your vehicle will not run or run very poorly.

 

The vehicle battery is disconnected | The defective top dead center sensor is removed | The new top dead center sensor is installed | The battery is connected and the engine is scanned and cleared of codes | The repair is verified and the vehicle is road tested for proper operation

 

If your car’s Check Engine light turns on, or if the engine will not run or runs poorly, have one of our expert mechanics inspect the problem and replace the TDC sensor if required.

 

Since the TDC sensor is integral to a running engine, it is important to address the operating issues associated with it as soon as possible. Other than a possible stalling condition, there are no associated safety concerns with the TDC.

September 26, 2026 BY
IN Sensor

Air Charge Temperature Sensor Replacement

Air is essential to engine operation. In fact, your engine is really just a giant pump designed to suck in as much air as possible. This air is mixed with fuel vapors (atomized gasoline) and then ignited. Without the right mix of air and fuel, the ignition will be off (too rich or too lean). A number of factors must be taken into account where airflow is concerned, including density, volume and temperature. The air charge temperature sensor is mounted to your intake, and works in tandem with other sensors to ensure that the car’s computer has the right information necessary to adjust the air/fuel ratio appropriately for the demands of the driver. Really, the air charge temperature sensor just measures the temperature of the incoming air. Warm air is less dense, while cool air is denser. This gives the computer the data necessary to adjust the mixture to provide the right performance. Over time, the air charge temperature sensor is exposed to high heat levels from the engine, and it will eventually fail through normal wear and tear.

 

The air charge temperature sensor is not part of any maintenance inspection. | The sensor mounts to the manifold, where temperatures are very high, so we don’t recommend attempting to replace it yourself. | A failing air charge temperature sensor will trigger the Check Engine light.

 

The air charge temperature sensor is verified to see if it needs to be replaced | The defective air charge temp sensor is removed | The new air charge temp sensor is installed | The air charge temp sensor is tested for operation | The vehicle is tested to ensure proper operation of the air charge temp sensor

 

The air charge temperature sensor is just one of several essential components that ensures your engine is able to operate correctly and provide the performance you need. Over time, it can wear and fail. If that happens, you can expect to see poor engine performance, and the Check Engine light will come on. If you suspect the air charge temperature sensor has failed or is failing, have one of our expert mechanics inspect and replace the sensor if required.

 

Without the necessary information about air volume, density and temperature, your car’s computer cannot determine the right air/fuel mixture. As a result, you could see either lean or rich operation, both of which can damage the engine. Replace a faulty air charge temperature sensor as soon as possible.

September 26, 2026 BY
IN Sensor

Air Cleaner Temperature Sensor Replacement

In order to properly adjust the air/fuel mixture for optimum engine operation at different speeds, your car’s computer needs a great deal of information. This includes airflow volume, density and temperature. Depending on the make and model you drive, you may have several different air temperature sensors on the vehicle, including an intake air temperature sensor and an air cleaner temperature sensor (most newer vehicles do not have an air cleaner temperature sensor). The air cleaner temperature sensor is a device that sits inside the breather housing. It’s generally vacuum operated and also contains electronic components. Its sole job is to send information to the car’s computer about the temperature of the air at the air cleaner. Based on this information, the car’s computer can adjust the flow of air into the intake to optimize engine operation.

 

Many cars do not have an air cleaner temperature sensor. | Air cleaner temperature sensors can fail over time and through normal wear and tear. | These temperature sensors can be damaged by careless installation of air filters and air filter housings. | Air cleaner temperature sensors are not inspected during normal maintenance.

 

The air cleaner temperature sensor is verified to see if it needs to be replaced | The defective air cleaner temperature sensor is removed | The new air cleaner temperature sensor is installed | The air cleaner temperature sensor is tested for operation | The vehicle is tested to ensure proper operation of the air cleaner temperature sensor

 

It is essential that your engine have enough information about airflow and air temperature to properly adjust the air/fuel mixture to meet operating demands. The air cleaner temperature sensor is just one of the tools it uses to do this. If you suspect the air cleaner temperature sensor is not working, have one of our expert mechanics diagnose the system and replace the sensor if required.

 

The air cleaner temperature sensor might not be the most important part on your engine, but its job is crucial for proper engine operation. If you’re experiencing rough idling or stalling when the car is cold, we recommend having the entire system diagnosed by one of our expert mechanics, as there are several potential problems that could cause these issues.

September 26, 2026 BY
IN Sensor

Camshaft Position Sensor Replacement

The camshaft position sensor monitors the position of the camshaft and reports that data to the car’s onboard computer system. This computer system works with sensors and other devices to keep the engine running. With data from the camshaft position sensor (CPS), the 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. The faulty readouts may also throw off spark timing, which will affect the car’s fuel economy. 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.

 

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. | 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.

 

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.

 

The camshaft position sensor isn’t checked in most regular services, but your vehicle has warning signs for when the sensor begins to fail. 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. 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. Without the sensor’s information, the computer won’t inject fuel properly, and your vehicle will stall or sputter.

September 26, 2026 BY
IN Sensor

Coolant Level Sensor Replacement

The coolant level sensor is designed to alert the driver when the coolant level is low and to prevent overheating or damage to the engine. This aids in diagnosing leaks and other dangerous cooling system conditions. Coolant level sensors can consist of a plastic sensor with a plastic or foam float that sits underneath the coolant reservoir cap. Or, they can be plastic sensors that plug into the radiator or other component of the cooling system. Some vehicles are equipped with a Low Coolant or Check Coolant warning light, while others may display a picture of the vehicle with a red dot in the engine bay. This is to inform the driver that the coolant needs to be checked or that there is a fault with the sensor.

 

The Check Coolant warning light may seem like a nuisance, but the system is there for a reason: to inform the driver of potentially dangerous engine conditions.

 

The Coolant Level Sensor is verified that it needs to be replaced. The coolant is drained to be below the sensor. | The defective Coolant Level Sensor is removed by disconnecting the electrical connection and removing it from the radiator or reservoir. | The new Coolant Level Sensor is installed, connected and the coolant is refilled. Then the cooling system is purged of air. | The Coolant Level Sensor is tested for leaks after system is filled and engine is run. | The vehicle is tested to ensure proper operation of the Cooling System

 

If you suspect the coolant level sensor has failed, have one of our licensed mechanics come to you to diagnose the issue and replace the part. Our mechanics can determine whether the sensor float is faulty, if the sensor itself is bad, or if there is low coolant or a leak in the system.

 

While you may wish to ignore the beeping and warning lights in your vehicle, it is important to get a diagnosis for the problem immediately before any further damage occurs, including unwanted coolant loss, engine overheating, and other major issues.

September 26, 2026 BY
IN Sensor

Crankshaft Position Sensor Replacement

Many newer cars have computerized engine management systems that rely on sensors to report data to the computer. The crankshaft position sensor is used in conjunction with the camshaft position sensor to control ignition timing and to let the computer know when to inject fuel and provide spark sequence. Due to the mounting locations of this sensor, it is common for heat and oil leaks to cause this sensor to fail.

 

Damage to the crankshaft position sensor is sometimes caused by leaking oil, which means there may be another component of your vehicle that needs replacement or repair. | The electrical connector can also be damaged, and should be inspected every time the position sensor is replaced.

 

Scan the car for trouble codes. | Remove and replace crankshaft position sensor. | Clear trouble codes. | Check for the proper operation of the car.

 

The crankshaft position sensor will usually let you know when it needs replacing. The Check Engine warning light will illuminate and you may notice that your vehicle has a hard time starting or running smoothly. When you notice any of these signs, schedule an inspection.

 

The crankshaft position sensor relays critical information to your vehicle’s computer management system. The sensor provides the management system with the information it needs to control ignition timing, and it lets the computer know when it needs to provide sparks and fuel. Without a functioning crankshaft position sensor, the computerized management system doesn’t receive this critical information, and the vehicle will either not start, or will misfire while you’re driving it.

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