Audi A4 2.0 TFSI White Smoke On Cold Start — PCV
Audi
A4
2005
2.0 TFSI BWE
⚡ Quick Summary
Severity Level
Medium
Safe to Drive?
🚫 Do NOT Drive
Safety Impact
Direct safety risk — affects safe operation of the vehicle
Urgency Level
🟡 Monitor Closely
White or bluish smoke from A4 2.0 TFSI on cold startup that clears after warm-up indicates PCV (crankcase ventilation) oil separator failure. Oil mist enters the intake in large quantities. PCV separator replacement costs £80-200 and should be the first repair before suspecting valve seals.
Onarım / Çözüm
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⚠️ Yanlış Teşhis mi?
No commonly reported misdiagnoses for this fault yet. If you have replaced a part that did not fix this Audi A4 2005 problem, submit a wrong diagnosis report — it helps other drivers avoid the same costly mistake.
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