OK so I have tested the key off and on to let the fuel pump prime and it still doesn't crank over right away. Grrr!
Originally Posted by rizzmonkey View Post
P0404: EGR Position sensor performance.
Theory of Operation
The EGR valve has a position sensor and the EGR position rationality is designed to make sure that the valve
moves freely within its operating range. Closed valve position reference check verifies that the valve is within its
allowable upper and lower limits. The EGR position rationality test looks for a sustained error relative to commanded
˛ When Monitored:
˛ Set Condition:
The EGR flow or valve movement is not what is expected
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