Engine Sensors, Relays, Switches
![Engine Sensors, Relays, Switches](https://ic.carid.com/pages/engine-sensors-relays-switches/engine-sensors-relays-switches_collage_0.jpg)
- Facet®Engine Camshaft Position SensorEngine Camshaft Position Sensor by Facet®. The electronic engine management system has become a fundamental element in modern motor vehicles. It works to prevent failures that might seriously compromise the safety of the driver....The reliable goods for increase of reliability of the carQuality equal, if not superior, to that of the original components$12.30 - $80.90
- Facet®Engine Crankshaft Position SensorEngine Crankshaft Position Sensor by Facet®. The function of the ignition system of a motor vehicle engine is to induce the combustion of the fuel. In internal combustion engines with positive ignition (petrol driven), turning on the...The reliable goods for increase of reliability of the carQuality equal, if not superior, to that of the original components$14.59 - $53.14
- Facet®Engine Oil Pressure SwitchEngine Oil Pressure Switch by Facet®. The function of the ignition system of a motor vehicle engine is to induce the combustion of the fuel. In internal combustion engines with positive ignition (petrol driven), turning on the ignition...The reliable goods for increase of reliability of the carQuality equal, if not superior, to that of the original components$3.95 - $26.99
- Facet®Oil Pressure Warning Light SwitchOil Pressure Warning Light Switch by Facet®. Facet products are designed, manufactured, and tested internally and the external works are entrusted to selected partners that operate in an integrated manner with Facet processes, following...The reliable goods for increase of reliability of the carQuality equal, if not superior, to that of the original components$4.64 - $6.30
- Hella®Camshaft Position SensorCamshaft Position Sensor by Hella®. This premium product is the best way to go for those looking for the highest quality replacement that offers supreme levels of quality, performance and reliability. Designed to provide a perfect fit...Made with precision and quality in mindDesigned to meet your specific needs$15.68 - $69.68
- Hella®Crankshaft Position SensorCrankshaft Position Sensor by Hella®. This premium product is the best way to go for those looking for the highest quality replacement that offers supreme levels of quality, performance and reliability. Designed to provide a perfect fit...OE quality parts from top original equipment and aftermarket manufacturersThe finest quality at a great price$14.05 - $111.01
- Hella®Oil Pressure SwitchOil Pressure Switch by Hella®. This premium product is the best way to go for those looking for the highest quality replacement that offers supreme levels of quality, performance and reliability. Designed to provide a perfect fit for a...Made with precision and quality in mindDesigned to meet your specific needs$7.82 - $85.68
- Omix-ADA®Camshaft Position SensorCamshaft Position Sensor by Omix-ADA®. This premium product is the best way to go for those looking for the highest quality replacement that offers supreme levels of quality, performance and reliability. Designed to provide a perfect...Same specs as OEM, for OEM style performanceWorks with stock valvetrain$58.20 - $108.77
- Omix-ADA®Crankshaft Position SensorCrankshaft Position Sensor by Omix-ADA®. This premium product is the best way to go for those looking for the highest quality replacement that offers supreme levels of quality, performance and reliability. Designed to provide a perfect...Same specs as OEM, for OEM style performanceWorks with stock valvetrain$33.95 - $108.77
- Omix-ADA®Oil Pressure SensorOil Pressure Sensor by Omix-ADA®. Perfect for your vehicle and lifestyle, it is manufactured to meet or exceed stringent industry standards.Performs according to OEM specificationsMeets or exceeds OEM quality standards$13.22 - $135.97
- Original Engine Management®Camshaft Position SensorCamshaft Position Sensor by Original Engine Management®. Magnetic reluctor type units match O.E. output wave shapes and amplitude to provide solid communication to on board computer. Solid state Hall-Effect units have same response...Made to deliver trouble-free operation for years aheadManufactured with cutting-edge technology$11.08 - $42.60
- Original Engine Management®Engine Oil Pressure Sender with LightEngine Oil Pressure Sender with Light by Original Engine Management®. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with customers in mind. It will meet...Made to deliver trouble-free operation for years aheadManufactured with cutting-edge technology$7.27 - $27.96
- United Motor Products®Engine Camshaft Position SensorEngine Camshaft Position Sensor by United Motor Products®. Keep your pride and joy operating as it should with this top-notch part from United Motors Products. It’s made using the finest materials and advanced manufacturing...Excellent replacement for your worn out factory partWill help make your vehicle running as good as new$14.66 - $48.37
- United Motor Products®Engine Oil Pressure SensorEngine Oil Pressure Sensor by United Motor Products®. Keep your pride and joy operating as it should with this top-notch part from United Motors Products. It’s made using the finest materials and advanced manufacturing equipment...Excellent replacement for your worn out factory partWill help make your vehicle running as good as new$9.50
- World Source One®Crankshaft Position SensorCrankshaft Position Sensor by World Source One®. This premium product is the best way to go for those looking for the highest quality replacement that offers supreme levels of quality, performance and reliability. Designed to provide a...Made with precision and quality in mindDesigned to meet your specific needs$12.10 - $68.81
- Aftermarket®Oil Pressure SwitchOil Pressure Switch by Aftermarket®. This premium product is the best way to go for those looking for the highest quality replacement that offers supreme levels of quality, performance and reliability. Designed to provide a perfect fit...Genuine OE quality at a budget-friendly priceMade to deliver reliable service for a long time$2.06 - $4.47
- Auto 7®Engine Camshaft Position SensorsEngine Camshaft Position Sensors by Auto 7®. Over the lifespan of your vehicle your engine's parts can become worn and in need of replacement. This can cause serious problems including power and fuel economy loss. Auto 7 has the...Original equipment quality parts for Hyundai, KIA and GM Daewoo vehicles without the original equipment priceAll parts made where the vehicles are made, South Korea$44.91 - $76.82
- Bougicord®Camshaft Position SensorCamshaft Position Sensor by Bougicord®. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with customers in mind. It will meet your needs and deliver great...Meticulously designed to meet your ignition needsDesigned to fit your specific engine needs$21.98 - $48.77
- Bremi®Camshaft Position SensorCamshaft Position Sensor by Bremi®. This premium product is the best way to go for those looking for the highest quality replacement that offers supreme levels of quality, performance and reliability. Designed to provide a perfect fit...Compliant with the strictest standards for qualityExpertly crafted using the up-to-date technology$10.75 - $71.01
- Bremi®Crankshaft Position SensorCrankshaft Position Sensor by Bremi®. This premium product is the best way to go for those looking for the highest quality replacement that offers supreme levels of quality, performance and reliability. Designed to provide a perfect fit...Compliant with the strictest standards for qualityExpertly crafted using the up-to-date technology$9.07 - $48.88
- Calorstat®Oil Pressure SensorOil Pressure Sensor by Calorstat®. Designed utilizing the latest technology, this product by Calorstat features premium quality and will perform better than advertised. Perfect for your vehicle and lifestyle, it is manufactured to meet...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$12.31
- Dansk®Oil Pressure SenderOil Pressure Sender by Dansk®. This premium product is the best way to go for those looking for the highest quality replacement that offers supreme levels of quality, performance and reliability. Designed to provide a perfect fit for a...Premium parts you can rely onDesigned to keep your A/C system in top shape$26.74 - $40.16
- Dansk®Oil Pressure SwitchOil Pressure Switch by Dansk®. This premium product is the best way to go for those looking for the highest quality replacement that offers supreme levels of quality, performance and reliability. Designed to provide a perfect fit for a...OE quality parts from top original equipment and aftermarket manufacturersThe finest quality at a great price$46.17
- Diamond®Crankshaft Position SensorCrankshaft Position Sensor by Diamond®. This premium product is the best way to go for those looking for the highest quality replacement that offers supreme levels of quality, performance and reliability. Designed to provide a perfect...Made with precision and quality in mindDesigned to meet your specific needs$42.95 - $53.04
- Dorman HD Solutions®Camshaft Position SensorCamshaft Position Sensor by Dorman HD Solutions®. This direct replacement camshaft position sensor matches the fit and performance of a failed original equipment sensor to restore proper engine starting and running, made of quality...Direct replacement - this camshaft position sensor matches the fit and performance of the original equipment sensorDurable construction - this part is manufactured to exacting standards to ensure reliable performance and durability$21.08 - $27.73
- FAE®Camshaft Position SensorCamshaft Position Sensor by FAE®. This premium product is the best way to go for those looking for the highest quality replacement that offers supreme levels of quality, performance and reliability. Designed to provide a perfect fit for...OE quality parts from top original equipment and aftermarket manufacturersThe finest quality at a great price$27.26 - $146.53
- FAE®Crankshaft Position SensorCrankshaft Position Sensor by FAE®. This premium product is the best way to go for those looking for the highest quality replacement that offers supreme levels of quality, performance and reliability. Designed to provide a perfect fit...OE quality parts from top original equipment and aftermarket manufacturersThe finest quality at a great price$30.59 - $163.00
- FAE®Oil Pressure SenderOil Pressure Sender by FAE®. This product is made of high-quality components to meet and exceed strict quality requirements. Designed using state-of-the-art technology and with customers in mind. It will meet your needs and deliver...Made with precision and quality in mindDesigned to meet your specific needs$4.68 - $74.44
- FAE®Oil Pressure SwitchOil Pressure Switch by FAE®. This premium product is the best way to go for those looking for the highest quality replacement that offers supreme levels of quality, performance and reliability. Designed to provide a perfect fit for a...OE quality parts from top original equipment and aftermarket manufacturersThe finest quality at a great price$10.99 - $19.32
- Forecast®Camshaft Position SensorsCamshaft Position Sensors by Forecast®. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with customers in mind. It will meet your needs and deliver great...High quality at an affordable priceExpertly made from premium materials$23.50 - $91.26
During vehicle operation, an assortment of sensors, senders, and switches sends voltage signals to an engine control system computer, called the Powertrain Control Module (PCM) or Engine Control Module (ECM). These voltage signals indicate engine load, vehicle speed, temperature, and other variables, and the computer uses the information to control the air/fuel mixture, ignition timing, emissions devices like the EGR valve, and dash indicators.
The oxygen (O2) sensor compares the oxygen content of the exhaust with the oxygen present in atmosphere and varies the voltage signal sent to the PCM/ECM accordingly. The computer uses the information to control fuel flow to maintain the air/fuel ratio for optimal performance, and lowest emissions. There are at least two O2 sensors, one located in the exhaust stream before the catalytic converter, and one afterward, also known as the catalyst monitor.
To know when to inject fuel and fire the spark plugs, the PCM/ECM needs to know the position of the valves in relation to the pistons and the rotational speed of the crankshaft. The Camshaft Position (CMP) sensor and Crankshaft Position (CKP) sensor provide these signals. Ignition timing is further controlled through the Knock Sensor (KS), which sends a voltage signal to the computer if vibration caused by detonation is detected, enabling the computer to retard spark advance and prevent engine damage.
The Throttle Position Sensor (TPS) signals the computer the position of the throttle shaft, indicating how fast you want to go. The PCM/ECM uses this information along with the Mass Air Flow (MAF) sensor signal, to calculate engine load, with increased load requiring more fuel. The Engine Coolant and Intake Air Temperature, supplied by the ECT and IAT sensors respectively, enable the computer to richen the mixture and increase spark advance when the engine is cold and then lean it out and retard timing as the engine warms up. Cooling fan operation and EGR valve opening also rely on temperature signals to the computer.
The Power Steering (PS) switch and A/C sensor signal the computer that there is increased load from power steering pump (such as during parking maneuvers) and A/C compressor operation, so the PCM/ECM can raise idle speed to prevent stalling. A brake switch can signal the computer to turn off the cruise control or disengage the torque converter clutch. The PCM/ECM also controls the dash gauges on modern vehicles, relying on input from an oil pressure sender, the Vehicle Speed Sensor (VSS), and the ECT sensor. Charging system operation, and the related dash gauge or warning light, are also controlled by the PCM/ECM.
Browse by Part Name
Featured Brands
Related Categories
Engine Assemblies
Motor Mounts
Engine Blocks
Valves & Valvetrain Parts
Pistons, Rings & Connecting Rods
Oil Filters
Serpentine Belts & Auxiliary Drive Belts
Valve Covers
Timing Gears, Chains & Covers
Engine Oil Pans, Drain Plugs & Dipsticks
Cylinder Heads
Timing Belts
Engine Pulleys
Oil Pumps
Drive Belt Tensioners
Oil Coolers
Camshafts
Crankshafts
Engine Management Systems
Engine Bearings
Harmonic Balancers
Engine Rebuild Kits
Oil Catch Cans
Balance Shafts
Engine Swap Kits
Engine Wiring Harnesses
Intercoolers
Throttle Bodies
Carburetors
Motor Oils