TSI / TFSI Turbo Petrol Patterns
Common behaviours around PCV faults, carbon build-up, misfires and boost control issues.
Open guide →VAG Platforms (VW / Audi / SEAT / Skoda)
High-signal platform notes for popular VAG models. Use these alongside the VAG behaviour guides and code deep dives.
VAG Behaviour Guides
TDI DPF & EGR Behaviour
DPF regeneration patterns, soot-loading causes, EGR flow faults and underboost behaviour on VAG diesels.
Open guide →Popular Model Profiles
VW Golf GTI (Mk6, 2009–2013)
2.0 TSI hot hatch – misfires, PCV/boost issues and carbon build-up patterns.
Open profile →VW Golf Mk6 2.0 TDI (2009–2013)
DPF, EGR and boost control issues on common-rail 2.0 TDI platforms.
Open profile →VW Passat B7 2.0 TDI (2011–2015)
Family diesel platform – regen behaviour, EGR faults and boost leaks.
Open profile →VW Tiguan 2.0 TDI (2008–2016)
Common diesel SUV platform – DPF/DPF sensor codes and underboost patterns.
Open profile →Audi A3 8P 2.0 TDI (2008–2013)
Shared platform behaviours with Golf – DPF, EGR and boost control issues.
Open profile →Audi A4 B8 2.0 TDI (2008–2015)
Longer wheelbase platform – soot-loading, intake contamination and boost leaks.
Open profile →Audi Q5 2.0 TDI (2009–2017)
Diesel SUV with common DPF/EGR and boost-control patterns under load.
Open profile →Skoda Octavia Mk2 2.0 TDI (2009–2013)
Workhorse platform – DPF, EGR and sensor plausibility issues.
Open profile →SEAT Leon Mk2 2.0 TDI (2006–2012)
Similar to Golf platform – underboost, EGR flow and DPF soot patterns.
Open profile →VW Polo 1.2 TSI (2010–2017)
Small turbo petrol – timing, misfires and PCV/air-leak patterns.
Open profile →How To Use These VAG Pages
Start with the model profile, then open any relevant code pages (generic + VAG-specific), and use the AI tools to build a step-by-step plan. The goal is to avoid parts darts and focus on the highest-signal checks first.