LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Volkswagen >> 2004 >> R32 >> Repair and Diagnosis >> External Pages >> Different car >> Section 12 (1.9L - Fuel Injection Glow Plug, Engine Code: ALH (A4 Platform)) >> 23 Diesel Fuel Injection >> Diesel fuel injection components and functions, checking >> Engine speed sensor, checking >> Notes
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Engine speed sensor, checking: Notes

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2001 Volkswagen Jetta, 2001 Volkswagen Golf, 2000 Volkswagen Jetta, 2000 Volkswagen Golf, and 1999 Volkswagen Jetta. However, it is still accessible from the selected car via links, so may be relevant.

The Engine speed (RPM) sensor G28 is a speed and reference mark sensor. The engine will not start if no speed signal is present. If the speed signal fails when the engine is running, it will cause the engine to stall immediately.

Special tools, testers and auxiliary items required