Testing jammed-open injectors: Audi 2.0 TDI (CAAA, CAAB, CAAC, CAAD, …)
Step-by-step testing jammed-open injectors for the Audi 2.0 TDI: 12 steps. What to remove, in what order, and what to check after.
Workshop procedure for AUDI — the exact step sequence and torque figures, straight from real workshop data.
🧭 Before you start
Fits: VW Transporter T6 (7F), VW Transporter T6 (7E)
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- Before removing, clean the parts thoroughly all over with brake cleaner and fluff-free cloth.
- Ensure cleanliness at all times.
- Tighten union nuts of high-pressure lines hand-tight. Make sure they are seated stress-free.
🔧 Engine codes this applies to
📐 31 workshop diagrams for CAAA
Real factory drawings for this job — timing marks, bolt locations and routing. Locked in the free view.
📋 Procedure
- ⚠ Read through the rules for cleanliness and the instructions for working on the fuel system .Always follow these rules for cleanliness and instructions before starting work and while working on the fuel system. — Clear event memory entry with .
- Before removing, clean the parts thoroughly all over with brake cleaner and fluff-free cloth.
- Dry all cleaned parts.
- Ensure cleanliness at all times.
- Check one cylinder after the other.
- Remove union nut for cylinder 1 at fuel rail. Also, loosen union nut at injector slightly.
- Seal open connection using plug T40204.
- Clear all event memory entries.
- Perform road test. [Note: When the correct injector has been located, there will be no fault stored regarding "“positive regulation deviation”".Other fault messages may possibly be stored in the memory. These new event memory entries must be taken into consideration (follow-on faults).]
- After road test, read out event memory. If there is an event memory entry regarding "“positive control deviation”" again, repeat the steps for all connections until there are no longer any event memory entries after a road test.
- Tighten union nuts of high-pressure lines hand-tight. Make sure they are seated stress-free.
- Install high-pressure lines .
Ask TorqFix about your Audi CAAA — it answers with the exact sequence for that engine and the workshop drawing for each step. First question is free after a 20-second sign-up, no card.
Ask about your Audi CAAA — free → or sign up free to see the drawingsOther AUDI procedures
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Who makes these pages, and how
TorqFix was built by a mechanic — after a 2,700 km drive with five roadside repairs that no diagnostic tool could explain.
The figures on this page come from manufacturer workshop documentation and are shown as they are. The page is assembled automatically from that data — it is not written by an AI. The AI works in the chat, where it answers for your specific car. It writes nothing here.
Variants of the same model differ. Cross-check torque against the factory manual for your engine before final tightening.
Seen a figure that does not match your manual? Write to us — we correct it and note when. support@torqfix.com
The story behind TorqFix →Workshop data on this page last updated 20 Sep 2026.