OBD codes / P0347
P0347
SeriousCamshaft Position Sensor A Circuit Low (Bank 2)
Treat P0347 with some urgency. The engine may keep running on its other sensors, but hard starts can progress to stalling or an intermittent no-start. Careful driving to a shop is fine; counting on the car until it's repaired is not.
What this code means
P0347 is the Bank 2 version of a cam-sensor circuit-low fault: the camshaft position sensor on the bank opposite cylinder 1 — which only exists on V-type and flat engines — is reading stuck at or below its minimum expected level. The computer uses each bank's cam signal (with the crank signal) to time fuel injection and identify cylinders, so a flatlined signal usually means a failed sensor, a wire shorted to ground, or a corroded connector; a damaged reluctor or metal debris on the sensor tip can also kill the signal. Many engines still start and run on the remaining sensors, but hard starting, rough running, stalling, and on some engines a no-start are all on the table, so this belongs in the fix-promptly category.
Symptoms you might notice
- Hard starting or extended cranking
- Stalling or rough running
- Hesitation and reduced power
- Occasional no-start on some engines
- Check-engine light
What it costs to fix
Typical range: $80–$350 · about ~0.2–1 hrs of labor
| If the cause is… | Part | Labor |
|---|---|---|
| Camshaft position sensor (Bank 2) | $30–$120 | ~0.2–1 hrs |
| Wiring / connector repair | $10–$120 | ~0.5–1.5 hrs |
Usually a quick, inexpensive sensor swap — though on some V-type engines the Bank 2 sensor sits toward the firewall and is more awkward to reach than its Bank 1 twin, adding a bit of labor.
The price swings on which cause it turns out to be — so confirm the cause before paying. Diagnose P0347 for my exact vehicle →
Frequently asked
What does P0347 mean in plain terms?
The cam sensor on Bank 2 — the cylinder bank without cylinder 1, so V-type and flat engines only — has a signal stuck low. That's almost always electrical: a dead sensor, a wire shorted to ground, or a corroded connector. The Bank 1 equivalent is P0342.
Will my car still start with P0347?
Usually — most engines can run using the crank sensor and the other bank's cam sensor, just with longer cranking or rougher running. Some engines are stricter and may intermittently refuse to start, so don't bank on it staying drivable.
Is it the sensor or the wiring?
The sensor is the most common failure, but the wiring to the Bank 2 side often routes through hotter, tighter spaces, and shorts or corrosion there mimic a dead sensor exactly. A quick circuit test before replacement avoids buying the wrong fix.
How much does it cost to fix P0347?
Typically inexpensive — the sensor is a cheap part and the swap usually takes under an hour, a bit more if the Bank 2 sensor is tucked against the firewall. Wiring repairs are similar once the fault is found.
Seeing P0347 on your car? Get a diagnosis specific to your exact year, make and model.
Diagnose P0347 for my vehicleRelated trouble codes
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Generic OBD-II reference. Manufacturer-specific behavior varies — confirm with a scan tool and, for safety-related codes, a professional inspection.