Apex Automotive & Emissions
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Diagnostic Trouble Code

P0335Crankshaft Position Sensor A Circuit

Crankshaft Position Sensor A Circuit

Definition

The crankshaft position sensor (CKP) circuit is not providing a signal. The CKP sensor is critical — it tells the ECM the exact rotational position and speed of the crankshaft, which is essential for ignition timing and fuel injection.

Common Causes

  • Faulty crankshaft position sensor
  • Damaged reluctor ring (tone wheel)
  • Wiring harness damage or short
  • Excessive sensor-to-reluctor air gap

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