OBD Cylinder 7 Deactivation/Intake Valve Performance
What it means
P349E stands for Cylinder 7 Deactivation/Intake Valve Performance. P349E is a P code, so the fault sits in the engine, transmission and emissions systems. For P349E, the second digit places it in auxiliary emission controls. For P349E, work through the cause list below, cheapest checks first.
Where it lives
For P349E, the description names the valve as the part involved. The description of P349E puts it on cylinder 7.
What to check first
For P349E, clear the code, drive a short distance and read it again, since a code that comes back is still there and one that does not was history.
Check these first
- P349E: Carbon buildup or blockage in the EGR, EVAP, or air injection system
- P349E: Failed solenoid, valve, or pump in the auxiliary emissions circuit
- P349E: Wiring, connector, or fuse fault for the emission component
- P349E: Small leaks in vacuum or EVAP lines
- P349E: Failing catalytic converter or oxygen sensor reporting incorrectly
What to do next
P349E is a fault in the auxiliary emission controls system. The steps below are general, so what actually failed on your vehicle may not be what P349E names.
- P349E: Read related codes and freeze frame with an OBD-II scanner
- P349E: Inspect hoses, valves, and solenoids for leaks, cracks, or carbon buildup
- P349E: Smoke test the EVAP or intake system if a leak is suspected
- P349E: Command components on/off with a scan tool and watch them respond
- P349E: Clean or replace the blocked or failed component
Look up another code
Enter a full code or a symptom. Press / to search. How to read a code
Type a code above, or start from a symptom or a common code.
Updated
Generic SAE J2012 definition. Last updated 2026-08-30.