P0347–P0392 Camshaft Position Sensor A Circuit Low Bank 2
The voltage on this circuit is sitting near zero. Typically a short to earth, or a sensor that has failed to its low end.
Can you drive it? The engine light will stay on and the car may run in a reduced-power mode. Read the freeze-frame data to see the conditions the fault was logged under.
Which code is which
Same fault, different cylinder or bank — diagnosed the same way. Several set together usually means one shared cause.
| Code | Definition | Severity |
|---|---|---|
P0347 | Camshaft Position Sensor A Circuit Low Bank 2 | Investigate soon |
P0367 | Camshaft Position Sensor B Circuit Low Bank 1 | Investigate soon |
P0392 | Camshaft Position Sensor B Circuit Low Bank 2 | Investigate soon |
The definition
P0347: Camshaft Position Sensor A Circuit Low Bank 2.
P0347 is a powertrain code (the engine or gearbox), defined by the SAE standard - it means the same thing on any make of car, and any generic OBD-II reader will decode it.
What to check first
Cheapest and fastest checks first:
- Unplug the sensor. If the reading jumps to full scale, the wiring is fine and the sensor has failed low.
- Check the sensor's 5V supply and its earth before condemning the sensor itself.
What actually causes this on a VAG
The camshaft position sensor tells the ECU where the camshaft is, so it can time injection and ignition correctly. Bank 2 is the cylinder bank that does not contain cylinder 1, which means this code only appears on V6, V8 or W engines - a four-cylinder or inline-five does not have a bank 2 at all. "Circuit Low" means the signal line is sitting lower than it should, typically a short to earth, a failed sensor or a lost supply. On VAG V engines these sensors are often tucked away at the back of a head or under the intake, so the awkward part is usually access rather than diagnosis.
Most likely causes, in order
- Wiring or connector damage at the sensor. The looms in the valley and along the back of the heads on these engines get cooked, and the plugs go hard and crack. Look for chafing where the lead touches the head or a bracket, melted insulation near the exhaust, and oil or corrosion inside the plug. Cheapest check, and often the whole answer.
- Oil in the connector from a leak above it. Oil wicks along inside the wire from a leaking cam cover or a perished sensor O-ring and separates the contacts. Cleaning the plug fixes it briefly. Replace the seal that is letting the oil in at the same time, or you will be doing the sensor job twice.
- Lost supply or earth on the sensor circuit. Sensors frequently share a supply and an earth. If several sensors logged faults at the same moment, stop chasing individual parts and look for the common wire, connector or earth point they all depend on.
- The sensor itself has failed. These are Hall-effect sensors and heat is what kills them - a classic pattern is a car that behaves when cold and stumbles or logs the fault once everything is up to temperature. If the wiring, supply and earth are sound and the fault appears hot, the sensor is a fair call.
Worth knowing: "Circuit Low" is a wiring-and-sensor complaint, not a statement about your timing. A genuinely slipped chain or displaced cam reports as a camshaft/crankshaft correlation fault, not this. Unless there is also a correlation code stored or an audible rattle from the chain, a quote for timing work off the back of P0347 deserves a second opinion. One more thing: if a generic reader shows you a bank 2 code on a four-cylinder car, do not go hunting for a sensor that does not exist - check the tool has identified the vehicle correctly and read the fault again in a VAG-aware tool.
Reading the code is the easy part
A code names the circuit that complained. What tells you why is watching the sensor behind it while the engine runs — and that is where a code reader stops and a diagnostic tool starts.
VAGPULSE reads every module in a VW, Audi, Skoda or SEAT — not just the engine — shows the live measuring blocks behind this fault, gives you the freeze-frame conditions it was logged under, and clears it once you have fixed it. It also does what a generic OBD reader cannot on a VAG: service resets, coding, adaptations, and Stage 1–3 flashing with your original file saved first.
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Common questions
What does P0347 mean?
P0347 means Camshaft Position Sensor A Circuit Low Bank 2. The voltage on this circuit is sitting near zero. Typically a short to earth, or a sensor that has failed to its low end.
Can I drive with P0347?
The engine light will stay on and the car may run in a reduced-power mode. Read the freeze-frame data to see the conditions the fault was logged under.