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P0338 Powertrain

Crankshaft Position Sensor "A" Circuit High Input

The CKP signal voltage is above the upper threshold. Either a sensor producing excess output or a short to supply voltage.

Affected components

  • Crankshaft position sensor
  • Crankshaft position sensor wiring

Common causes

  • High likelihood: Signal wire shorted to supply voltage
  • Medium likelihood: Sensor failed
  • Low likelihood: Connector pins corroded - high contact resistance

Diagnostic notes

  • The malfunction indicator lamp may illuminate
  • This code can affect emissions
  • A drive cycle may be required after repair

Related codes

Sources

Diagnostic information is provided for reference only. Confirm the code with a compatible scan tool and follow the vehicle manufacturer's service procedures before replacing components.

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