Removing and installing tank pressure sensor G400, Passat — VW
Removing and installing tank pressure sensor G400, Passat on VW: 11 steps, engines CDGA. What to remove, in what order, and what to check after.
Workshop procedure for VW — the exact step sequence and torque figures, straight from real workshop data.
🧭 Before you start
Fits: VW Touran I (1T, 2003–2015), VW Passat B6 (3C, 2005–2010), VW Passat B7 saloon (362, 2010–2014), VW Passat B7 Variant (365, 2010–2014)
🔧 Engine codes this applies to
📋 Procedure
- Observe safety precautions .
- Observe rules for cleanliness .
- Observe safety precautions when working on natural gas system .
- ⚠ Release pressure in the system before working on the natural gas system. — Release pressure in high-pressure line Fuel supply system – natural gas engines20Fuel tanks; Releasing pressure in high-pressure line.
- Detach exhaust hanger (1), and loosen clamp (2).
- Remove exhaust pipe.
- Remove protective covers on underbody Fuel supply system – natural gas engines20Fuel tank; Assembly overview - protective covers.
- Close mechanical shut-off valves (1) and (2) using handwheel T50026.
- Close mechanical shut-off valve (1) using handwheel T50026.
- Release and disconnect connector (1) from tank pressure sensor G400.
- Immediately seal open connections with suitable plugs from engine bung setVAS 6122.
Other VW procedures
- Removing and installing fuel tanks 1 and 2, 7-seater, natural gas, engine code CDGA
- Removing and installing upper part of intake manifold · 1 torque figures
- Checking function and voltage supply, engine code CDGA
- Removing and installing front fuel tanks from and to support, natural gas
- Removing and installing solenoids from tank shut-off valve 1N361 · 1 torque figures
- Removing engine · 41 torque figures
- Removing and installing camshaft – VW Golf Cabriolet · 47 torque figures
- Adjusting valve timing – VW Passat B5 · 83 torque figures
- Removing and installing camshafts – VW Passat B6 · 39 torque figures
- Removing and installing coolant pump · 53 torque figures
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.