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.

Real-world scan data

Seen in

674

scans in the past year

Found in

0.1%

of scans

0.2%

of scans that found faults

Appears alongside · share of P0344 scans

P0340in 31.9% of scans

P0341in 14.7% of scans

P0016in 10.5% of scans

Figures reflect only diagnostic scans recorded through our own apps and tools. Cars are typically scanned because a symptom or warning light prompted it, so these counts describe our scan records — not the incidence of faults in any model, and not the quality, reliability, or safety of any vehicle. No comparison between manufacturers or models is implied. All trademarks belong to their respective owners; no affiliation or endorsement is implied.

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.

Read & clear P0344 yourself

Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.

▶ Get it on Google Play

✓ Verified name — SAE J2012 / ISO 15031-6Guidance reviewed by OBD DashX