have the oil sending unit tested Thanks it was the sending unit sensor
How do you reset engine light on jeep liberty diesel
From what I read in the manual it is the catalytic converter. A misfire that could damage the cat.
Bad sending unit
The engine computer controls the check engine light.
Some have a safety switch to prevent engine damage that cuts off fuel supply as soon as engine oil pressure drops to an unsafe level
No, oil level does not cause the check engine light.
Not to my Konwing
what is this code p1491 on 2003 jeep liberty
1) the engine oil level is low 2) the engine oil is old - making it very thin, especially after the engine warms up. Likely the oil light is doing its job and calling your attention to the level and condition of the engine oil.
It looks like a little yellow engine.
Check to coolant level in the coolant recovery tank and radiator when engine is cold
Scan tool, will give you a trouble code as to why the computer turned the check engine light on.