P0347
Camshaft Position Sensor A Circuit Low Bank 2
Ignition / engine position
Generic OBD-II
High
What it means
P0347 means the bank 2 camshaft position sensor "A" signal is reading too low. The ECM uses this sensor to time fuel injection and spark to the correct cylinders, so a weak or missing signal typically shows up as hard starting, stalling, or rough running rather than a fixed no-start on most engines.
High
Can I keep driving? Often drivable, but expect hard or long starts and occasional stalling; some engines won't start at all without the cam signal, so repair it soon.
Common symptoms
What you'll notice
- Check-engine light on
- Hard starting or extended cranking
- Stalling or hesitation while driving
- Rough running or reduced power
Common causes
Most likely first
- Failed camshaft position sensor on bank 2Likely
- Short to ground or open in the sensor signal circuitCommon
- Loose or corroded connector at the sensorCommon
- Damaged wiring or loss of reference voltage/groundLess often
- ECM fault (rare)Less often
How to diagnose & fix
Work through it in order
- Read freeze-frame data and confirm the fault is on the bank 2 sensor.
- Inspect the sensor connector and wiring for damage or corrosion.
- Check the signal circuit for a short to ground and confirm reference voltage.
- Compare the bank 2 sensor's reading to bank 1 if the engine has two.
- Replace the bank 2 camshaft position sensor if it tests faulty; clear and re-test.
FAQ
Quick answers
Is it safe to drive with P0347?+
Short trips may be possible, but a failing cam sensor can cause hard starts and stalling, so it's best repaired before you rely on the car.
Can I just clear P0347?+
It returns once the ECM detects the low signal again. The sensor or its wiring needs repair first.
Related codes
Often seen with P0347
Read & clear P0347 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