Q:

What is a symptom of a bad crank sensor?

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Quick Answer

One symptom of a bad crank sensor is over-consumption of fuel. A bad crank sensor may also result in poor acceleration and as well as engine stall.

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Full Answer

A car's crank sensor is a device that monitors crankshaft speed and transmits the speed information to the onboard computer, which in turn regulates the spark timing and the amount of fuel that enters the engine accordingly. The two parts that constitute the crank sensor include the rotating and static parts.

A faulty crank sensor results in inaccurate sensor readings and erroneous information sent to the onboard computer. This tampers with the spark timing and fuel injection, leading to increased fuel consumption. Additionally, when a faulty crank sensor relays inaccurate information to the onboard computer, the engine's ability to synchronize the pistons is disabled, leading to poor acceleration.

When the crank sensor hitches, the car loses its ignition timing ability. This results in engine startup problems. It also leads to engine stoppage when the vehicle is running at a low speed.

To prevent the worsening of the problems that result from a faulty crank sensor, the car owner should seek the services of a professional mechanic; doing so may help avoid road accidents.

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