Engine Sensors, Relays, Switches & Connectors

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.

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    • (0 reviews)
      # sp98224
      Emission System Motor by Standard®. SMP’s vision is to be the leading independent supplier to the automotive aftermarket, providing the highest quality products, competitive prices and the highest reputation for integrity to all...
      High quality at an affordable priceExpertly made from premium materials
      $23.03 - $124.50
    • (0 reviews)
      # sp133713
      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 perfect fit for...
      Compliant with the strictest standards for qualityExpertly crafted using the up-to-date technology
      $2.74 - $322.51
    • (0 reviews)
      # sp136637
      Oil Pressure Switch with Seal Ring by Febi®. 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...
      OE quality parts from top original equipment and aftermarket manufacturersThe finest quality at a great price
      $3.30 - $4.09
    • (0 reviews)
      # sp47693
      Camshaft Position Sensor by Vemo®. Is your vehicle feeling down on power? Do you see dark puddles on the ground when you park? Is your CHECK ENGINE light on? Your engine may be in need of repair, but before you waste your time and gas...
      OE quality parts from top original equipment and aftermarket manufacturersThe finest quality at a great price
      $59.79
    • (0 reviews)
      # mpn4529422630
      Oil Level Sensor by Dansk®. 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...
      Created by professionals to meet your requirementsWill look good for many years of use
      $90.09
    • (1 review)
      # sp127288
      Camshaft 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
      $9.87 - $44.06
    • (0 reviews)
      # sp127290
      Crankshaft Position Sensor by Original Engine Management®. The crank angle sensors are mounted to the timing cover and are manufactured to O.E. specification utilizing ferrite magnets, high-impact housings, and O.E.-style connectors....
      Made to deliver trouble-free operation for years aheadManufactured with cutting-edge technology
      $7.46 - $33.29
    • (0 reviews)
      # sp127292
      Engine 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
      $3.32 - $18.02
    • (0 reviews)
      # sp127294
      Engine Oil Pressure Switch by Original Engine Management®. In Original Engine Management® water temperature switch line, Original Engine Management covers all vehicles equipped with instrument panel gauges as well as those with...
      Made to deliver trouble-free operation for years aheadManufactured with cutting-edge technology
      $4.21 - $19.96
    • (0 reviews)
      # sp146747
      Camshaft Position Sensor by Maneki®. 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...
      Made to deliver second to none quality and absolute reliabilityBuilt to provide the ultimate in reliability and strength
      $6.17 - $19.02
    • (0 reviews)
      # sp146748
      Crankshaft Position Sensor by Maneki®. 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...
      Made to deliver second to none quality and absolute reliabilityBuilt to provide the ultimate in reliability and strength
      $7.03 - $19.02
    • (0 reviews)
      # sp9403
      Replacement Engine Camshaft Position Sensor by Cardone®. Automated test equipment verifies signal strength, correct polarity of wire harness, air gap, crank reluctor tooth size, as well as ignition coil and pickup performance. O.E....
      50-state emissions street legalThe finest quality at a great price
      $58.87 - $200.02
    • (0 reviews)
      # sp24705
      Select Camshaft Position Sensor by Cardone®. CARDONE Select Engineered (CSE) Technology ensures that all distributors meet or exceed O.E. form, fit and function. The only NEW distributor in the aftermarket that is 100% computer tested...
      50-state emissions street legalThe finest quality at a great price
      $12.81 - $153.36
    • (0 reviews)
      # sp111479
      Select Engine Crankshaft Position Sensor by Cardone®. Cardone remanufactured crank angle sensors provide reliable performance at the best price. Each unit is tested, verifying its signal strength, wire harness polarity, ignition coil...
      Cardone Select Engineered (CSE) technology ensures that all distributors meet or exceed O.E. form, fit and functionThe only new distributor in the aftermarket that is 100% computer tested for guaranteed, long-lasting performance
      $114.07 - $159.00
    • (0 reviews)
      # sp133396
      HD Solutions™ Camshaft Position Sensor by Dorman®. 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...
      OE quality parts from top original equipment and aftermarket manufacturersThe finest quality at a great price
      $18.21 - $25.38
    • (0 reviews)
      # sp133397
      HD Solutions™ Crankshaft Position Sensor by Dorman®. 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...
      OE quality parts from top original equipment and aftermarket manufacturersThe finest quality at a great price
      $24.46
    • (0 reviews)
      # sp133399
      HD Solutions™ Oil Pressure Sensor by Dorman®. 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
      $65.79 - $84.79
    • (0 reviews)
      # sp133402
      HD Solutions™ Turbocharger Speed Sensor by Dorman®. 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...
      OE quality parts from top original equipment and aftermarket manufacturersThe finest quality at a great price
      $170.67
    • (1 review)
      # sp133407
      OE Solutions™ Camshaft Position Sensor by Dorman®. 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...
      Compliant with the strictest standards for qualityExpertly crafted using the up-to-date technology
      $10.12 - $73.95
    • (2 reviews)
      # sp133410
      OE Solutions™ Crankshaft Position Sensor by Dorman®. 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...
      Compliant with the strictest standards for qualityExpertly crafted using the up-to-date technology
      $7.12 - $74.95
    • (0 reviews)
      # sp133411
      OE Solutions™ Cylinder Deactivation Solenoid by Dorman®. 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...
      OE quality parts from top original equipment and aftermarket manufacturersThe finest quality at a great price
      $69.95 - $193.95
    • (0 reviews)
      # mpn4515649045
      OE Solutions™ Driver Side Magnetic Crankshaft Position Sensor by Dorman®. Engine Crankshaft Position Sensors measure crankshaft location to detect misfire and control engine timing. Dorman's Engine Crankshaft Position Sensors are...
      Direct replacement for a proper fitEasy to install
      $50.95
    • (0 reviews)
      # mpn4515649197
      OE Solutions™ Magnetic Crankshaft Position Sensor by Dorman®. Engine Crankshaft Position Sensors measure crankshaft location to detect misfire and control engine timing. Dorman's Engine Crankshaft Position Sensors are constructed of...
      Direct replacement for a proper fitEasy to install
      $15.95
    • (0 reviews)
      # mpn4515649045
      OE Solutions™ Magnetic Crankshaft Position Sensor by Dorman®. Engine Crankshaft Position Sensors measure crankshaft location to detect misfire and control engine timing. Dorman's Engine Crankshaft Position Sensors are constructed of...
      Direct replacement for a proper fitEasy to install
      $50.95
    • (0 reviews)
      # mpn4515649344
      OE Solutions™ Magnetic Crankshaft Position Sensor by Dorman®. Engine Crankshaft Position Sensors measure crankshaft location to detect misfire and control engine timing. Dorman's Engine Crankshaft Position Sensors are constructed of...
      Direct replacement for a proper fitEasy to install
      $19.95
    • (0 reviews)
      # sp133413
      OE Solutions™ Oil Pressure Sensor by Dorman®. 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
      $27.33 - $100.95
    • (0 reviews)
      # sp133414
      OE Solutions™ Oil Pressure Sensor Filter by Dorman®. 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...
      Compliant with the strictest standards for qualityExpertly crafted using the up-to-date technology
      $3.27
    • (0 reviews)
      # mpn4515649045
      OE Solutions™ Passenger Side Magnetic Crankshaft Position Sensor by Dorman®. Engine Crankshaft Position Sensors measure crankshaft location to detect misfire and control engine timing. Dorman's Engine Crankshaft Position Sensors are...
      Direct replacement for a proper fitEasy to install
      $50.95
    • (0 reviews)
      # mpn697812396
      OE Solutions™ Turbocharger Speed Sensor by Dorman®. 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...
      OE quality parts from top original equipment and aftermarket manufacturersThe finest quality at a great price
      $173.95
    • (0 reviews)
      # mpn771429773
      OE Solutions™ Turbocharger Vane Position Solenoid by Dorman®. Restore proper boost pressure with Dorman’s Turbocharger Wastegate Solenoid. An easy, fast replacement, our Wastegate Solenoid helps the engine function powerfully and...
      Restores engine to proper performancePrevents engine damage
      $113.72




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    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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    Engine Sensors, Relays, Switches Reviews

    Average rating:  4.5  4.5 - 47 reviews
    5 of 5
    Upper Crankshaft Position Sensor
    Unit went in as it should, works as it should, no complaints, should have bought these the first time!
    Posted by Robert Zwingman (Topinabee, MI) / May 12, 20182001 Cadillac Deville
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