2003 Dodge Dakota PU - your check engine light comes on low gas and gauge goes to empty What is the cause?

The most likely cause of the check engine light coming on and the gas gauge going to empty is a faulty fuel level sensor. The fuel level sensor is responsible for sending a signal to the instrument cluster indicating how much fuel is in the tank. If the sensor is faulty, it may send an incorrect signal, causing the check engine light to come on and the gauge to go to empty.

Other possible causes include:

* A problem with the fuel pump. If the fuel pump is not working properly, it may not be able to deliver enough fuel to the engine, causing the check engine light to come on and the gauge to go to empty.

* A problem with the fuel line. If there is a leak in the fuel line, it may cause the fuel pressure to drop, leading to the check engine light coming on and the gauge going to empty.

* A problem with the instrument cluster. If the instrument cluster is faulty, it may not be able to correctly display the fuel level, causing the check engine light to come on and the gauge to go to empty.

If you are experiencing this issue, it is important to have your vehicle diagnosed by a qualified mechanic as soon as possible to determine the cause and have it repaired.