P2990 Diagnostic Trouble Code Discussion for April 2026
Turbo underboost
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| Help Request | Posted | |
| 2014 Audi A7 Quattro 3.0L MIL Lamp on VIN: WAUFFAFC2E P2990: Turbo/Super Charger Underboost. For the past year + this car keeps coming back with an intermittent CE/MIL. This should not be hard to diagnose at all! Coatomer states: "When fuel distance is at 450 Ceck engine light illuminates... When it goes 50 miles or less it goes out" Perha... |
April 14, 2026 |
