10 dodge coolway engine fault light is on.

There are several reasons why the engine fault light is on: the oil supply system, ignition system, air intake system, exhaust system and various sensor components are out of order. You can eliminate them one by one by exclusion. If the engine lights up while driving, go to the repair shop to check the fault code.

If the computer detects that the engine has a serious fault, the computer will start the emergency system. When the engine runs under the emergency system, the fuel consumption and power loss will not be considered. This is to ensure that the engine can continue to run without stalling.

Extended data:

The fuel pressure at idle speed should be about 250 kPa. With the opening of the throttle, the fuel pressure should be gradually increased. The fuel pressure at full throttle is about 300 kPa. If the fuel pressure can change with the change of throttle opening, but the pressure is always high, it means that the oil pressure regulator is faulty and should be replaced.

If the fuel pressure can't change with the change of throttle opening, but always stays at about 300kPa, it means that the vacuum hose of the oil pressure regulator is broken or falls off, or the solenoid valve controlled by the fuel pressure regulation is faulty, and the vacuum degree of the intake pipe does not act on the vacuum diaphragm chamber of the oil pressure regulator, resulting in high oil pressure. In this regard, the hose or solenoid valve should be replaced. If the fuel pressure is too high, reaching more than 400kPa, it means that the oil return pipe is blocked or the oil pressure regulator is faulty, so the oil return pipe should be detected or the oil pressure regulator should be replaced.

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