Audi Engine & Misfire Fault Codes — Causes, Symptoms & Repair

Browse 39 engine & misfire fault codes relevant to Audi vehicles. A fault code identifies the system reporting an out-of-range condition; accurate repair starts with a full diagnostic scan and live-data checks, not a parts guess.

Common Audi Engine & Misfire Fault Codes

• P2227 — Audi Barometric Pressure Sensor Performance
• P2015 — Audi Intake Manifold Runner Position
• P0016 — Audi Cam-Crank Correlation (TFSI Chain Stretch)
• P0411 — Audi Secondary Air Injection
• P200A — Audi Intake Manifold Runner Control
• P0011 — Camshaft Position A — Timing Over-Advanced
• P0014 — Camshaft Position B — Timing Over-Advanced
• P0017 — Crankshaft / Bank 1 Exhaust Camshaft Correlation
• P0089 — Fuel Pressure Regulator Performance
• P0171 — System Too Lean (Bank 1)
• P0174 — System Too Lean (Bank 2)
• P0299 — Turbocharger Underboost
• P0300 — Random / Multiple Cylinder Misfire
• P0301 — Cylinder 1 Misfire
• P0302 — Cylinder 2 Misfire
• P0303 — Cylinder 3 Misfire
• P0304 — Cylinder 4 Misfire
• P0305 — Cylinder 5 Misfire
• P0306 — Cylinder 6 Misfire
• P0316 — Misfire Detected on Startup
• P0335 — Crankshaft Position Sensor Circuit
• P0340 — Camshaft Position Sensor Circuit
• P0420 — Catalyst Efficiency Below Threshold (Bank 1)
• P0430 — Catalyst Efficiency Below Threshold (Bank 2)

What to Do When a Warning Light Appears

• Record the warning message and any change in how the car drives.
• Avoid long or high-load driving if the warning is flashing, the car is overheating, or it has entered limp mode.
• Book a diagnostic scan so the stored code, live data and root cause can be checked before parts are replaced.