P3406–P3494 Cylinder 1 Exhaust Valve Control Circuit Performance
The part responds, but not the way the ECU expects under these conditions - a wear or plausibility problem rather than a dead circuit.
Can you drive it? This class of fault can cause real mechanical damage if you keep driving on it. A persistent misfire also destroys the catalytic converter, which is the expensive part.
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 |
|---|---|---|
P3406 | Cylinder 1 Exhaust Valve Control Circuit Performance | Do not keep driving |
P3414 | Cylinder 2 Exhaust Valve Control Circuit Performance | Do not keep driving |
P3422 | Cylinder 3 Exhaust Valve Control Circuit Performance | Do not keep driving |
P3430 | Cylinder 4 Exhaust Valve Control Circuit Performance | Do not keep driving |
P3438 | Cylinder 5 Exhaust Valve Control Circuit Performance | Do not keep driving |
P3446 | Cylinder 6 Exhaust Valve Control Circuit Performance | Do not keep driving |
P3454 | Cylinder 7 Exhaust Valve Control Circuit Performance | Do not keep driving |
P3462 | Cylinder 8 Exhaust Valve Control Circuit Performance | Do not keep driving |
P3470 | Cylinder 9 Exhaust Valve Control Circuit Performance | Investigate soon |
P3478 | Cylinder 10 Exhaust Valve Control Circuit Performance | Do not keep driving |
P3486 | Cylinder 11 Exhaust Valve Control Circuit Performance | Do not keep driving |
P3494 | Cylinder 12 Exhaust Valve Control Circuit Performance | Do not keep driving |
The definition
P3406: Cylinder 1 Exhaust Valve Control Circuit Performance.
P3406 is a manufacturer-specific powertrain code (the engine or gearbox). Its meaning is set by the carmaker rather than by the SAE standard, so a generic OBD-II reader will often show it as an unknown code or misread it.
What to check first
Cheapest and fastest checks first:
- Read the freeze-frame data stored with the fault - engine speed, load and temperature at the moment it logged tell you whether this happens cold, hot or under load.
- Check the connector at the part for corrosion, and that it is fully seated.
- Clear the code and see whether it returns, and under what conditions.
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 P3406 mean?
P3406 means Cylinder 1 Exhaust Valve Control Circuit Performance. The part responds, but not the way the ECU expects under these conditions - a wear or plausibility problem rather than a dead circuit.
Can I drive with P3406?
This class of fault can cause real mechanical damage if you keep driving on it. A persistent misfire also destroys the catalytic converter, which is the expensive part.