Checking charge pressure sender G31 - engine codes ANB, APU, ARK, ATW — AUDI
Checking charge pressure sender G31 - engine codes ANB, APU, ARK, ATW on Audi: 16 steps, engines AEB, AJL, ANB, APU.
Workshop procedure for AUDI — the exact step sequence and torque figures, straight from real workshop data.
🧭 Before you start
Fits: Audi A4 B5 (8D)
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- If specification is not attained, connect adapter cable, 121-pinV.A.G 1598/31 (test box) to connectors of wiring harness; do not connect engine control unit. Connect earth clip of test box to earth 24.
📐 46 workshop diagrams for AEB
Real factory drawings for this job — timing marks, bolt locations and routing. Locked in the free view.
📋 Procedure
- From menu (1), select diagnostic function "“Interrogate fault memory”" and press → key to continue.
- Press ← key to exit function "“Interrogate fault memory”".
- Select "“End output”".
- Switch off ignition.
- Unplug electrical connector (arrow) at charge pressure sender G31.
- Connect hand-held multimeterV.A.G 1526D to measure voltage between contacts (1) and (3) of electrical connector for charge pressure sender G31.
- Switch on ignition.
- If specification is not attained, connect adapter cable, 121-pinV.A.G 1598/31 (test box) to connectors of wiring harness; do not connect engine control unit. Connect earth clip of test box to earth 24.
- Check for open circuit and short to positive or earth in the following wiring for charge pressure sender G31:
- Repair wiring connection if necessary.
- Connect electrical connector to charge pressure sender G31.
- Connect multimeter (voltage measurement range) between socket "“101”" and socket "“108”" of adapter cable, 121-pinV.A.G 1598/31.
- Start the engine and run at idling speed.
- Increase engine speed by operating throttle quickly.
- If specifications are not attained, check for open circuit and short to positive or earth in the following wiring for charge pressure sender G31:
- Repair wiring connection if necessary.
Ask TorqFix about your Audi AEB — 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 AEB — 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.
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The story behind TorqFix →Workshop data on this page last updated 20 Sep 2026.