MANUFACTURER REFERENCE
Audi code references.
Explore documented code cases for the models, years and powertrains identified by the manufacturer.
Audi diagnostic guides
Find a guide by codeAudi A4 P0299: confirm the CAEB wastegate diagnosis
A4 CAEB: distinguish intake faults, sporadic codes and confirmed wastegate wear before replacing a turbocharger.
Audi A3/A4 P2187, P2279 or P1297: match the PCV hardware first
Identify the applicable hardware and update history.
Audi A8 P2279/P0507 and a warm-idle whistle: the two-check breather diagnosis
Two observations must agree before this Audi bulletin supports an oil-separator replacement.
These manufacturer documents cover specific vehicle conditions. Keep the complete scanner display and match the stated model, year and powertrain before using a case.
Browse the separate generic OBD-II referenceModel documentation
Only models identified by the cited manufacturer material are listed.
Documented code cases
Each document retains its own vehicle scope and complete code displays.
Static P029900
CAEB wastegate evaluation.
Documented scope: 2009–2010 · CAEB
Displays: P029900
Follow current Audi guided diagnosis.
Requires matching vehicle and fault conditions.
Pressure-control diagnosis
VIN-limited pressure-control case.
Documented scope: 2005–2008 A4; 2006–2008 A3 · A4: BPG (2005–2006), BWT (2007–2008); A3: BPY
Displays: P1297, P2187, P2279
See the diagnostic guide.
Full VIN and engine matching required; see source applicability table.
Two-check breather diagnosis
Two-check breather case.
Documented scope: 2013–2016 · 4.0 TFSI
Displays: P2279, P227900, P0507, P050700
See the diagnostic guide.
A8 scope only.