The Quick Answer above is the generic definition. What follows is the model-specific detail for the SEAT models that log P2004.
DTC/P2004·SEAT
P2004 on SEAT: Causes, Symptoms and Fix Cost
Quick Answer
Moderate SeveritySafe to drive (short-term)SEAT
P2004 on a SEAT means the intake manifold runner flaps are stuck in the open position. These flaps change the length of the intake path to optimise airflow at different RPM ranges. When stuck open, the engine loses low-speed torque and may run roughly at idle because airflow is optimised for high RPM only.
Typical repair cost, all makes€110 - €1000
Connect any standard Bluetooth OBD2 adapter to your SEAT and Skanyx tells you what P2004 means on that engine, whether it is safe to keep driving, and what the fix should cost. Free on iPhone and Android.
Get Skanyx freeWhat does P2004 mean on a SEAT?
SEAT Leon
2005-2024The Leon shares its 2.0 TFSI and 2.0 TDI engines with the VW Golf and is equally affected. The intake manifold part numbers are identical. A complete manifold and a flap-and-linkage repair kit are both options; the kit is usually the cheaper of the two.
What causes P2004 on a SEAT?
Beyond the generic causes listed on the main P2004 page, these are the patterns noted for SEAT models:
SEAT LeonIdentical VAG intake manifold flap failure as Golf/A4
SEAT LeonCarbon deposits accelerating flap wear on TDI variants
How to diagnose P2004 on a SEAT with OBD2
Follow these steps to pinpoint the root cause of P2004:
- Listen for a rattling or clicking noise from the intake manifold at idle and during acceleration. Broken flaps or linkage rods often produce a distinct metallic rattle.
- Remove the intake manifold top cover or use a borescope to visually inspect the runner flaps. Check that all flaps move freely and none are cracked, broken, or jammed with carbon deposits.
- Test the runner control actuator motor by commanding it on and off with a diagnostic scanner in actuator test mode. You should hear the motor activate and see the flaps move.
- Check the actuator motor electrically: verify power supply, ground, and motor resistance. A seized motor will draw excessive current or show very low resistance.
- If the flaps and actuator test good, check for vacuum leaks (on vacuum-actuated systems) or wiring faults between the ECU and the actuator motor.
How much does P2004 cost to fix on a SEAT? (EUR)
Estimated repair costs for P2004 in EUR, compiled across makes. SEAT costs typically sit in the middle of each range.
Prices estimated as of March 2026. Costs vary by region, vehicle, and shop.
Codes related to P2004
These codes are often seen alongside P2004 or point to related issues, on any make:
Looking for the full P2004 reference (all makes, full diagnosis flow, complete repair cost matrix)?
See the main P2004 guideSkanyx · SEAT
Diagnose P2004 on your SEAT
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