Engine Sensors, Relays, Switches
- TRQ®Engine Camshaft Position SensorEngine Camshaft Position Sensor by TRQ®. Replace your vehicle’s faulty cam sensor with the TRQ engine camshaft position sensor to make your engine perform as it should and bring your vehicle back to its former glory. Developed and...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$16.95 - $121.95$20.95 - $121.95Save up to 6%
- TRQ®Engine Oil Pressure SwitchEngine Oil Pressure Switch by TRQ®. 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...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$17.81 - $34.87$18.95 - $35.95Save up to 7%
- Walker Products®Engine Crankshaft Position SensorEngine Crankshaft Position Sensor by Walker Products®. 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...High quality at an affordable priceExpertly made from premium materials$9.53 - $1,209.51
- Walker Products®Engine Camshaft Position SensorEngine Camshaft Position Sensor by Walker Products®. 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...High quality at an affordable priceExpertly made from premium materials$5.17 - $1,116.84
- Mopar®Crankshaft Position SensorCrankshaft Position Sensor 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...Ideal solution to keep your vehicle in top shapeCrafted from premium-grade materials and the latest technology$11.13 - $955.87
- Spectra Premium®Crankshaft Position SensorCrankshaft Position Sensor by Spectra Premium®. 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...Compliant with the strictest standards for qualityExpertly crafted using the up-to-date technology$10.52 - $291.75
- TRQ®Oil Pressure SensorOil Pressure Sensor by TRQ®. If your vehicle has symptoms of a bad cylinder head, replace it with a cost-efficient solution by TRQ. Built to optimize your driving experience, this product is manufactured with high-quality components to...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$16.87 - $39.72$17.95 - $40.95Save up to 6%
- Dorman®OE Solutions™ Oil Pressure SensorOE Solutions™ Oil Pressure Sensor by Dorman®. This replacement oil pressure sensor is a direct replacement for the original sensor on specified applications. It is ruggedly designed and built to withstand required operating pressures...Ideal replacement - this oil pressure sensor directly replaces the original sensor on specified vehicles and applicationsDurable construction - this sensor is specifically designed to withstand pressure and temperature extremes for reliable performance and accurate measurement$11.89 - $100.14
- Delphi®Engine Camshaft Position SensorEngine Camshaft Position Sensor by Delphi®. Delphi sensors use the Hall Effect or magneto resistive (MR) principles for accurate and clean signal input to the electronic control module (ECM). The result is more design flexibility to...Extensive coverageApplications for ignition (camshaft and crankshaft position and speed), transmission (vehicle or engine speed) and anti-lock braking systems (wheel speed)$11.72 - $131.92
- ACDelco®GM Original Equipment™ Camshaft Position SensorGM Original Equipment™ Camshaft Position Sensor by ACDelco®. Designed utilizing the latest technology, this GM Original Equipment™ Camshaft Position Sensor by ACDelco features premium quality and will perform better than...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$14.89 - $171.83
- Mopar®Engine Wiring HarnessEngine Wiring Harness 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...Ideal solution to keep your vehicle in top shapeCrafted from premium-grade materials and the latest technology$0.89 - $5,193.36
- Denso®Camshaft Position SensorCamshaft Position Sensor by Denso®. 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$17.52 - $231.69
- Denso®Crankshaft Position SensorCrankshaft Position Sensor by Denso®. 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$16.27 - $276.99
- ACDelco®GM Original Equipment™ Oil Pressure SensorGM Original Equipment™ Oil Pressure Sensor by ACDelco®. Designed utilizing the latest technology, this product by ACDelco features premium quality and will perform better than advertised. Perfect for your vehicle and lifestyle, it is...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$25.89 - $53.92
- Mopar®Camshaft Position SensorCamshaft Position Sensor 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...Ideal solution to keep your vehicle in top shapeCrafted from premium-grade materials and the latest technology$15.52 - $393.78
- Spectra Premium®Camshaft Position SensorCamshaft Position Sensor by Spectra Premium®. 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...Compliant with the strictest standards for qualityExpertly crafted using the up-to-date technology$11.33 - $346.84
- WVE®Engine Oil Pressure SwitchEngine Oil Pressure Switch by WVE®. Replace your worn-out or faulty component with this quality replacement from WVE. This product is designed and tested to ensure the ultimate in durability and functionality. Made to meet or exceed the...Excellent replacement for your worn-out factory partDesigned to keep your vehicle running reliably mile after mile$3.93 - $1,326.95
- ACDelco®GM Original Equipment™ Crankshaft Position SensorGM Original Equipment™ Crankshaft Position Sensor by ACDelco®. Designed utilizing the latest technology, this product by ACDelco features premium quality and will perform better than advertised. Perfect for your vehicle and lifestyle,...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$8.42 - $130.76
- 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$31.48 - $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$10.50 - $242.36
- Mopar®Oil Pressure SwitchOil Pressure Switch 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...Ideal solution to keep your vehicle in top shapeCrafted from premium-grade materials and the latest technology$4.80 - $408.59
- Walker Products®Engine Oil Pressure SwitchEngine Oil Pressure Switch by Walker Products®. 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...High quality at an affordable priceExpertly made from premium materials$6.57 - $108.09
- Delphi®Engine Crankshaft Position SensorEngine Crankshaft Position Sensor by Delphi®. Delphi sensors use the Hall Effect or magneto resistive (MR) principles for accurate and clean signal input to the electronic control module (ECM). The result is more design flexibility to...Extensive coverageApplications for ignition (camshaft and crankshaft position and speed), transmission (vehicle or engine speed) and anti-lock braking systems (wheel speed)$11.86 - $136.48
- SMP®Engine Camshaft Position SensorEngine Camshaft Position Sensor by SMP®. 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...Designed specifically for motorcycle applicationsPerfect to help you work more efficiently$9.22 - $112.92
- SMP®Engine Crankshaft Position SensorEngine Crankshaft Position Sensor by SMP®. 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...Designed specifically for motorcycle applicationsPerfect to help you work more efficiently$12.99 - $126.36
- NTK®Crankshaft Position SensorCrankshaft 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...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$10.36 - $525.67
- Dorman®TECHoice™ Multi-Purpose ConnectorTECHoice™ Multi-Purpose Connector by Dorman®. Make better electrical repairs and accessory installations with this versatile and durable pigtail connector. It allows quick circuit disconnections for service, and is engineered for...Professional appearance - this electrical pigtail is designed for a clean, professional look when installedConvenient solution - this pigtail connector allows the circuit to be quickly disconnected for service or occasional use$14.14 - $24.74
- Mopar®Oil Pressure SenderOil Pressure Sender 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...Ideal solution to keep your vehicle in top shapeCrafted from premium-grade materials and the latest technology$34.83 - $390.88
- Motorcraft®Camshaft Position SensorCamshaft Position Sensor by Motorcraft®. 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...Compliant with the strictest standards for qualityExpertly crafted using the up-to-date technology$6.80 - $134.77
- Motorcraft®Crankshaft Position SensorCrankshaft Position Sensor by Motorcraft®. Motorcraft is the way to restore the performance of your vehicle. Designed specifically for your vehicle, Motorcraft products meet stringent Ford Motor Company standards and feature OEM quality...OE quality parts from top original equipment and aftermarket manufacturersThe finest quality at a great price$8.75 - $148.48
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
- 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