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What does fuel fail 39 mean 91 Jaguar?

The "fuel fail 39" error code on a 91 Jaguar indicates a problem with the fuel system, specifically a fault in the fuel pressure sensor circuit. The fuel pressure sensor is responsible for monitoring the fuel pressure in the system and providing this information to the engine control unit (ECU). If the sensor fails or the circuit is faulty, the ECU may not receive accurate information about the fuel pressure, which can lead to engine performance issues or even engine damage.

To resolve the "fuel fail 39" error code, you should first check the fuel pressure sensor and its wiring for any damage or loose connections. If the sensor or wiring is damaged, it will need to be replaced. You may also need to have the fuel pressure sensor circuit tested by a qualified mechanic to determine if there are any electrical problems.

Ignoring the "fuel fail 39" error code and continuing to drive the vehicle can be dangerous, as it could lead to engine damage. It is important to address this issue as soon as possible to ensure the safety and reliability of your Jaguar.

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