Error code

OBD2 P0349

OBD2P0349
Diagnostic Trouble Code· Standard OBD-II fault code read from the vehicle's onboard diagnostics.

What it means

Camshaft Position Sensor 'A' Circuit Intermittent.

Severity

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

Summary

P0349 indicates an intermittent issue with the camshaft position sensor 'A' circuit on bank 2 of the engine.

Symptoms

  • No-start or start-stall condition
  • Hard starting, rough running, misfiring, poor acceleration

Common Causes

  • Faulty camshaft position sensor coil
  • Poor installation with incorrect clearance between sensor and reluctor ring
  • Electrical interference from alternator phase problems
  • Rodent damage to wiring or connectors
  • Corrosion or connector breakage in older vehicles

Diagnosis

  1. Visual inspection of the sensor and wiring harness for damage
  2. Resistance check to identify open or short circuits in the sensor
  3. Signal check using a digital oscilloscope or DVOM to measure signal strength
  4. Electrical inspection including resistance, continuity, and ground checks

Fixes

  • Replace faulty camshaft position sensor if necessary

FAQ

Can I drive with P0349?

The vehicle may still be drivable, but performance issues such as hard starting and rough running are likely.

What should I check first when diagnosing P0349?

Start by visually inspecting the camshaft position sensor and its wiring for any signs of damage or poor installation.

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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