Error code

OBD2 P0339

OBD2P0339
Diagnostic Trouble Code· Standard OBD-II fault code read from the vehicle's onboard diagnostics.

What it means

Crankshaft Position Sensor 'A' Circuit Intermittent.

Severity

moderateThe vehicle may still be drivable, but performance issues are likely.

Summary

P0339 indicates an intermittent issue with the crankshaft position sensor 'A' circuit in your vehicle's engine.

Symptoms

  • Engine may experience no-start or start-stall conditions
  • Hard starting, rough idle, or poor acceleration

Common Causes

  • Faulty crankshaft position sensor
  • Poor installation of the sensor
  • Wiring issues such as loose connectors or damaged harness
  • Electrical interference from alternator phase problems
  • Damage to wiring by animals or environmental factors

Diagnosis

  1. Inspect all connectors and ensure they are properly connected.
  2. Check the wiring harness for damage or loose connections.
  3. Test the sensor's resistance and signal using a digital multimeter (DVOM).
  4. Verify proper clearance between the sensor and reluctor ring.

Fixes

  • Replace faulty crankshaft position sensor if necessary.

FAQ

What can cause P0339?

Common causes include a faulty sensor, poor installation, wiring issues, electrical interference from the alternator, and damage from animals or environmental factors.

How do I diagnose P0339?

Diagnose by inspecting connectors, checking wiring harness for damage, testing sensor resistance and signal with a multimeter, and ensuring proper clearance between the sensor and reluctor ring.

View source

Not affiliated with OBD2. Answer summarized from the manufacturer's manual linked above; consult that source for the authoritative procedure.

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