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P0301Cars & SUVs
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P0301 — Cylinder 1 misfire detected

The crankshaft position sensor shows a combustion miss on cylinder 1. Drivers often feel idle shake, power loss, and higher fuel use—especially after repeated cold starts.

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Likely causes

  • Faulty spark plug or ignition coil on cylinder 1
  • Clogged injector or intake manifold sealing leak
  • Low compression (valves, rings, or head gasket)

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Recommended checks

  1. 1

    Inspect and replace the cylinder 1 spark plug and coil

  2. 2

    Compression-test and leak-down the affected cylinder

  3. 3

    Clean or replace the injector if the misfire continues

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Parts to replace