Engine Sensors, Relays, Switches
- NTK®Camshaft Position SensorCamshaft Position Sensor by NTK®. Designed utilizing the latest technology, this product features premium quality and will perform better than advertised. Perfect for your vehicle and lifestyle, it is manufactured to meet or exceed...Sealed connections to prevent leaks, environmental corrosion and performance issuesDesigned to deliver trouble-free, consistent performance$14.48 - $574.17
- Vemo®Oil Pressure Regulating ValveOil Pressure Regulating Valve by Vemo®. Vemo products are made by high-quality materials and undergo strict quality tests. They are, thereby, the perfect alternative to the original part.Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$37.54 - $386.69
- Holstein®Engine Camshaft Position SensorEngine Camshaft Position Sensor by Holstein®. The Camshaft Position Sensor monitors the rotating position of the camshaft relative to the crankshaft position. This data is sent to the vehicles ECU where it is used to adjust the spark...Holstein focuses on using only the highest quality materials,Manufactured to exacting standards for an aftermarket product that is truly built to match or exceed the OE part$7.77 - $205.20
- Autotecnica®Crankshaft Position SensorCrankshaft Position Sensor by Autotecnica®. Designed utilizing the latest technology, this product features premium quality and will perform better than advertised. Perfect for your vehicle and lifestyle, it is manufactured to meet or...OE quality parts from top original equipment and aftermarket manufacturersThe finest quality at a great price$7.31 - $26.74
- 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 - $55.11
- 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
- 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
- VDO®Camshaft Position SensorCamshaft Position Sensor by VDO®. 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...Made with precision and quality in mindDesigned to meet your specific needs$52.48 - $128.14
- Walker®Crankshaft Position SensorCrankshaft Position Sensor by Walker®. 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...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$21.76 - $135.85
- Futaba®Oil Pressure SwitchOil Pressure Switch by Futaba®. 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$8.20 - $25.81
- Mitsubishi Electric®Camshaft Position SensorCamshaft Position Sensor by Mitsubishi Electric®. 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$21.47 - $463.53
- ACDelco®GM Original Equipment™ Engine Wiring HarnessGM Original Equipment™ Engine Wiring Harness by ACDelco®. Designed utilizing the latest technology, this GM Original Equipment™ Engine Wiring Harness by ACDelco features premium quality and will perform better than advertised....Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$127.82 - $174.48
- ACDelco®Genuine GM Parts™ Camshaft Position SensorGenuine GM Parts™ Camshaft Position Sensor by ACDelco®. 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...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$31.31 - $177.03
- ACDelco®Genuine GM Parts™ Crankshaft Position SensorGenuine GM Parts™ Crankshaft Position Sensor by ACDelco®. 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...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$8.20 - $242.36
- Dorman®HELP™ Oil Pressure Sensor FilterHELP™ Oil Pressure Sensor Filter by Dorman®. This engine oil pressure sensor filter is designed to match the fit and function of the original filter on specified vehicles, and is engineered for durability and reliable performance.Direct replacement - this engine oil pressure sensor filter is designed to match the fit and function of the original filter on specified vehiclesRestores functionality - reliable replacement for an original part that has failed due to clogging$5.70
- Dorman®OE Solutions™ Oil Pressure Sensor FilterOE Solutions™ Oil Pressure Sensor Filter by Dorman®. This engine oil pressure sensor filter is designed to match the fit and function of the original filter on specified vehicles, and is engineered for durability and reliable...Direct replacement - this engine oil pressure sensor filter is designed to match the fit and function of the original filter on specified vehiclesRestores functionality - reliable replacement for an original part that has failed due to clogging$5.77
- Mopar®22 Way Wiring Kit22 Way Wiring Kit by Mopar®. Female. Radio. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship. Manufactured from...Carefully crafted from premium materialsExcellent corrosion and wear resistance$111.71
- Mopar®Decoupler RingDecoupler Ring by Mopar®. Sensor. Heater Tube Lower Intake. Heater Feed Tube. M18.95. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of...Carefully crafted from premium materialsExcellent corrosion and wear resistance$17.94
- Mopar®Engine WiringEngine Wiring by Mopar®. Want your prized possession to look and perform the way it was designed to? Then top-of-the-line Mopar automotive parts and accessories are for you. Made using the latest manufacturing technology to meet the...Ideal solution to keep your vehicle in top shapeCrafted from premium-grade materials and the latest technology$246.16 - $733.46
- Mopar®Hex Flange NutHex Flange Nut by Mopar®. M20x1.50. Tow Hook Attaching. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship. Manufactured...Carefully crafted from premium materialsExcellent corrosion and wear resistance$4.68 - $15.64
- Mopar®Sensor Mounting BracketSensor Mounting Bracket by Mopar®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship. Manufactured from industry-leading...Carefully crafted from premium materialsExcellent corrosion and wear resistance$8.34 - $126.20
- Genuine®Camshaft Position SensorCamshaft Position Sensor by Genuine®. Genuine is here to give you the ultimate in quality and reliability at a cost you can afford. Designed utilizing the latest technologies and manufactured from premium materials using...Made with precision and quality in mindDesigned to meet your specific needs$30.96 - $462.75
- Genuine®Engine Wiring HarnessEngine Wiring Harness by Genuine®. If your engine parts is in need of repair, don’t compromise the performance and safety of your car with suspect, off-brand replacement parts from the local auto parts chain store. On our website...Made with precision and quality in mindDesigned to meet your specific needs$19.89 - $1,911.50
- Cardone New®Camshaft Position SensorCamshaft Position Sensor by Cardone New®. Cardone New Camshaft Position Sensors provide reliable performance at the best price. Each unit is 100% tested, verifying its signal strength, wire harness polarity, ignition coil quality and...All electronic module components are 100% computer tested to ensure full functionalityGuaranteed fit and function$32.29 - $494.50
- Cardone New®Engine Crankshaft Position SensorEngine Crankshaft Position Sensor by Cardone New®. Cardone New Crank Angle Sensors are backed by Cardone New Engineering (CSE), ensuring proper fit and function and restoring engine performance, returning your car back on the road. All...All electronic module components are 100% computer tested to ensure full functionalityGuaranteed fit and function$195.32 - $301.94
- Cardone Reman®Engine Camshaft Position SensorEngine Camshaft Position Sensor by Cardone Reman®. Cardone Reman Remanufactured Camshaft Position Sensors provide reliable performance at the best price. Each unit is tested, verifying it's signal strength, wire harness polarity,...All electronic module components are 100% computer tested to ensure full functionalityGuaranteed fit and function$132.75 - $353.54
- Standard®Blue Streak™ Crankshaft Position SensorBlue Streak™ Crankshaft Position Sensor by Standard®. 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...Made with precision and quality in mindDesigned to meet your specific needs$21.97 - $129.97
- Standard®Blue Streak™ Oil Pressure SenderBlue Streak™ Oil Pressure Sender by Standard®. 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...OE quality parts from top original equipment and aftermarket manufacturersThe finest quality at a great price$8.45 - $27.64
- Standard®Crankshaft Position SensorCrankshaft Position Sensor by Standard®. 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...OE quality parts from top original equipment and aftermarket manufacturersThe finest quality at a great price$9.00 - $196.70
- Standard®Engine Oil Pressure SensorEngine Oil Pressure Sensor by Standard®. For over 100 years, professional technicians have trusted Standard® to replace the failed OE part. Standard® manufacturers the highest-quality, best-performing parts for all import and...Each Oil Pressure Sensor is a direct-fit OE replacement that ensures ease of installationHigh-quality materials withstand extreme conditions$48.56
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.
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