RepairPal is your advocate for car care advice and guidance

Q: location of egr valve sensor on 2003 Mercury Grand Marquis

Check engine light came on, a new egr valve was replace after clearing the code vacuum is acceptable, car runs for a day but flashes a code again for in-sufficient egr. flow.what is the solution?
Get a Repair Estimate
Guaranteed by certified locations nationwide. Learn more
RepairPal estimates are guaranteed at over 1,700 quality certified locations nationwide. Learn more
vacuum is acceptable??? how was it measured?? who diaged this??

anyway, if it is a 401 code, chances are it is a dpfe sensor. it is a common failure but needs to be confirmed by a shop with a scanner who can verify voltage changes.

Didn't find what you were looking for?