Same as all other cars, it senses crankshaft angle so that the engine control module can apply spark to the fuel at a precise time to achieve full combustion with minimal emissions. there's usually also a camshaft sensor, and many vehicles will use the camshaft sensor if the crankshaft sensor fails to provide limited functionality (limp home mode). If its dead, you'll have to replace it for the engine to operate properly. I don't know if your vehicle has any mileage limits on limp-home mode.
JUST HAD A LOOK IN MY VAUXHALL VECTRA.C MANUAL.NO SENSOR ON THE CRANKSHAFT..
On a Vauxhall Vectra B, the crankshaft position sensor is typically located near the engine's crankshaft, often on the lower part of the engine block. It's usually positioned near the flywheel or behind the engine, close to the transmission. To access it, you may need to lift the vehicle and remove any obstructions, such as the protective undertray. Always refer to the specific service manual for your vehicle for precise location and removal instructions.
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Just after the airbox before the air flow sensor
On a Vauxhall Vectra B 1.8 16V, the crankshaft position sensor is typically located near the bottom of the engine, close to the flywheel. It is mounted on the engine block and may be accessed from underneath the vehicle. To reach it, you might need to remove some components or covers for better visibility and access. Always consult a repair manual for specific details and diagrams for your model.
The bulb failure lamp on a 1999 Opel Vectra B?æis located on the dash board. It is an operational amplifier chip.
the sensor is underneath the power steering pump and the alternator, awkward to get to, you may have to remove top fixing for the dipstick housing.
vectra b is the earlier engine
crankshaft sensor b circuit
Open your bonnet look where the ecotec cover is to the left of that there will be a wire that goes in a gap that's 4 your cam sensor
The crankshaft sensor is by the crankshaft pullie (the balancer)
Yes there is a crankshaft sensor