The crankshaft position sensor tracks the precise position and speed of the crankshaft, essential timing data the ECU uses to control fuel injection and ignition.
If you notice any of the following, the part likely needs replacement:
Engine won’t start (no crank signal)
Engine stalling unexpectedly while driving
Check Engine light with a crank position fault code
Installation information
Bolts near the crankshaft pulley or flywheel — check the correct air gap to the tone ring is set during installation.
Frequently asked questions
Without accurate crankshaft position data, the ECU cannot correctly time fuel injection or ignition spark, meaning the engine simply cannot run — this is one of the most common causes of a genuine "won’t start" fault.
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August 2026
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Toyota Avensis
August 2026
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