P0344
Camshaft Position Sensor A Circuit Intermittent Bank 1 or Single Sensor
Camshaft position
Generic OBD-II
High
What it means
P0344 means the camshaft position sensor A signal is cutting in and out. The ECM uses cam position to time fuel and spark, so a dropout can make the engine stumble, stall, or occasionally refuse to start. Because it's intermittent it can be hard to catch, but it should be treated as a real driveability and starting risk.
High
Can I keep driving? Risky — an intermittent cam signal can cause sudden stalling or a no-start, so treat it as unreliable and fix it before depending on the vehicle.
Common symptoms
What you'll notice
- Check-engine light on
- Intermittent stalling or hard starting
- Occasional no-start
- Rough running, hesitation, or misfire
Common causes
Most likely first
- Intermittent open in the cam-sensor wiring or connectorLikely
- Faulty camshaft position sensorCommon
- Loose or corroded connectorCommon
- Damaged reluctor ring or excessive sensor air gapLess often
- Faulty ECM (rare)Less often
How to diagnose & fix
Work through it in order
- Read freeze-frame data and note the conditions when the signal drops.
- Wiggle-test the sensor connector and harness for an intermittent open.
- Inspect the sensor and its air gap to the reluctor.
- Replace the camshaft position sensor if the signal is erratic.
- If wiring and sensor are good, evaluate the ECM. Clear and re-test.
FAQ
Quick answers
Is it safe to drive with P0344?+
Not reliably — it can stall or fail to start unexpectedly. Fix it before relying on the vehicle for trips.
Can I just clear P0344?+
It returns when the intermittent fault recurs; the wiring or sensor must be repaired.
Related codes
Often seen with P0344
Read & clear P0344 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