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Ford Ranger: Why is my check engine light still on after I fixed the problem?

April 26, 2017engine fixed Ford light problem Ranger

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Ford Ranger: Why is my check engine light still on after I fixed the problem?

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I have a 1995 Ford Ranger with 205,000 miles and the check engine light came on with the code for “EGR Valve – Insufficient Flow”. Anyway, I replaced the EGR valve for $80.00 and the light is still on. The truck runs a hell of a lot smoother now with a little more power to boot. Why is the light still on? What else could be causing the “insufficient flow”? A: The EGR valve is opened by a Vacuum Solenoid Switch which is opened by current from the computer. If the VSS isn’t opening, it won’t allow enough vacuum to open the EGR valve. You could also have a vacuum leak, but with 205,000 miles, you could have oil/ carbon build up in the intake, preventing sufficient vacuum to the EGR valve. One other possibility is that the EGR position sensor/ DPFE is sending an incorrect signal to the ECU.