Audi A4 B9 40 TFSI 45 TFSI Carbon Intake Valve Build-Up
Audi
A4
2015
2.0 TFSI EA888 Gen3
⚡ Quick Summary
Severity Level
Low
Safe to Drive?
⚠️ Drive with Caution
Safety Impact
Indirect risk — worth monitoring, not urgent
Urgency Level
🟢 Low Priority
The Gen3 EA888 in A4 B9 accumulates carbon on intake valves above 100,000 miles. Rough idle at cold start confirms the fault. Walnut blasting costs £350-500.
Repair / Solution
No confirmed fixes yet. Share yours below.
⚠️ Wrong Diagnosis?
No commonly reported misdiagnoses for this fault yet. If you have replaced a part that did not fix this Audi A4 2015 problem, submit a wrong diagnosis report — it helps other drivers avoid the same costly mistake.
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