What does fuel fail 29 mean on a 1990 xj6?

Fuel Fail 29 on a 1990 Jaguar XJ6 indicates a fault in the fuel system, specifically related to the fuel injection system or its components. This error can arise from issues such as a faulty fuel pump, clogged fuel filter, or problems with the engine control unit (ECU). It's advisable to check the fuel pressure, inspect the fuel lines, and run diagnostic tests to pinpoint the exact issue. Addressing these problems promptly is essential to ensure the vehicle runs smoothly.