P0349
Camshaft Position Sensor A Circuit Intermittent Bank 2
Camshaft position sensor
Generic OBD-II
High
What it means
P0349 means the camshaft position sensor signal on bank 2 is dropping out intermittently. The computer uses this signal to time spark and fuel injection, so an on-and-off fault can cause occasional stalling, hard starting, or brief hesitation. Because it's intermittent, it can be hard to catch but should be traced before it leaves you stranded.
High
Can I keep driving? Driveable but unpredictable — an intermittent cam signal can cause sudden stalling or a hard/no-start. Diagnose it before relying on the car.
Common symptoms
What you'll notice
- Check-engine light on
- Intermittent stalling or hard starting
- Rough idle or brief hesitation while driving
- Momentary loss of power that comes and goes
Common causes
Most likely first
- Faulty or intermittently dropping camshaft position sensor (bank 2)Likely
- Chafed, loose, or corroded wiring causing an intermittent openCommon
- Poor or backed-out connection at the sensor connectorCommon
- Damaged reluctor/tone wheel or debris near the sensor tipLess often
- Failed ECM (rare — check the sensor and wiring first)Less often
How to diagnose & fix
Work through it in order
- Read freeze-frame data to see the conditions when the fault dropped out.
- Wiggle-test the sensor connector and harness with a scan tool watching the cam signal.
- Inspect the connector and wiring for corrosion, chafing, or loose pins; check the sensor tip and air gap.
- Test the sensor's signal, power, and ground while the fault is present if possible.
- Replace the camshaft position sensor if intermittent, then clear and re-test.
FAQ
Quick answers
Is it safe to drive with P0349?+
Use caution. Because the fault is intermittent, the car may stall without warning or refuse to restart. Have it diagnosed before depending on it for a trip.
Can I just clear P0349?+
Clearing hides it briefly, but an intermittent connection or failing sensor will set it again — and can strand you until repaired.
Related codes
Often seen with P0349
Read & clear P0349 yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.
✓ Verified name — SAE J2012 / ISO 15031-6Guidance reviewed by OBD DashX