Error code

OBD2 P0348

OBD2P0348
Diagnostic Trouble Code· Standard OBD-II fault code read from the vehicle's onboard diagnostics.

What it means

Camshaft Position Sensor 'A' Circuit High.

Severity

highThe vehicle may be drivable but will likely experience poor performance.

Summary

P0348 indicates high input in the camshaft position sensor circuit 'A' on bank 2 of an engine with variable valve timing (VVT). This sensor is crucial for proper engine operation.

Symptoms

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

Common Causes

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

Diagnosis

  1. Visual inspection of the sensor connection 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, open circuit, and short-to-ground checks

Fixes

  • Replace faulty camshaft position sensor

FAQ

What should I do if the wiring is damaged?

Repair or replace any damaged wiring and connectors to ensure proper signal transmission.

Can a faulty crankshaft position sensor cause P0348?

Yes, issues with the crankshaft position sensor can trigger auxiliary fault codes like P0348.

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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