P0299, P0016, P0018 Audi 4.0 TFSI V8 – Oil Screen & Turbo Failure

Diagnostic Priority: High

Complexity Level: Advanced

Diagnostic guide for Audi 4.0 TFSI V8 twin-turbo oil screen clogging and turbo bearing failure.

Vehicle

AUDI

Codes

3 units

Analysis Type

Technical Expert

Status

Analyzed

Technical Analysis

REF: #107727

P0299, P0016, and P0018 on Audi 4.0 TFSI V8 identify oil starvation to twin turbochargers from a clogged Hot-V oil screen.

Expected Symptoms

Check engine light illuminated with sudden boost drop under hard acceleration on AUDI (DTCs: P0299, P0016, P0018)

Rough idle and sluggish throttle pickup from a dead stop

Misfiring and hesitation during high-speed highway overtaking (2,500–3,500 RPM)

System Impact

Drivetrain

Engine Control

Emission Control

Potential Fault Sources

01Sticking electronic wastegate actuator or heavy carbon buildup on intake valves (affecting AUDI subsystem for P0299, P0016, P0018)

02Boost control solenoid N75 leakage or split charge air hose

03Ruptured diaphragm in PCV oil separator assembly (logged fault: P0299)

Workflow / Methodology

Verify supply voltage and sensor telemetry for P0299, P0016, P0018 on AUDI with multimeter at key ON.

Measure wastegate position feedback voltage at key ON: normal 3.5–3.9 V in closed position.

Smoke-test induction system and boost plumbing at 1.2 bar to pinpoint leaks.

Check crankcase depression with digital manometer at warm idle (-100 to -150 mbar).

Live Data & Mätvärdestoleranser (Är/Bör-värden)

Fabriksgodkända referensvärden vid diagnos och live-avläsning

Mätvärdesblock

Parameter / Signal	Testvillkor	Bör-värde (Normalt)	Avvikelse / Varning
Oljetryck Hot-V Galleri	Tomgång 80°C olja	1.5 – 2.2 bar	< 1.1 bar
Laddtryck Bank 1 vs 2	Fullgas 3500 rpm	2 200 – 2 450 mbar	Bankdiff > 300 mbar

Assessment & Action Proposal

Technical Recommendation

Upgrade to revised large-mesh oil screen, replacement of both turbochargers, and intercooler flush.

Need a deeper analysis? Use our advanced fault code analyzer to find likely connections and in-depth guidance.

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Vanliga frågor om dessa felkoder

Vad är den primära orsaken till felkoderna?

P0299, P0016, and P0018 on Audi 4.0 TFSI V8 identify oil starvation to twin turbochargers from a clogged Hot-V oil screen.

Kan man köra vidare med tänd motorlampa / varningslampa?

Körning med aktiva felkoder kan leda till strypt motoreffekt (nödläge / Limp Home), blockerad partikelfilterregenerering eller följdskador på mekaniska komponenter. Felsökning bör genomföras omgående.

Hur åtgärdas kombinationen på säkrast sätt?

Upgrade to revised large-mesh oil screen, replacement of both turbochargers, and intercooler flush.