Mercury Grand Marquis Problem Report
Mercury Grand Marquis EVP Sensor Failure May Cause Drivability/Fuel Economy Issues
The EGR valve position (EVP) sensor can fail on this vehicle. The EVP sensor measures the EGR valve position and transmits the date to the engine control computer. If it fails, drivability and fuel economy can suffer, the Check Engine Light will commonly illuminate.
Had it in the shop several time for the same EGR valve and light on - Visitor
When you crank it up and put it in gear it will cut off - Visitor
EGR pressure sensor (DPFE-4) failed. Replaced with new OEM part and failed again within 6 months. - Visitor
Replaced the EGR 3x (was not aware of the issue) then replaced the snsor with the 3rd EGR. It worked fine for quite some time then the same error occured (P401 - I think?). Cleaning the PCV valve FINALLY did the trick. - Visitor
My car is not idle hoe it suppose to and it's smoking from tail pipe - Visitor
Had the same reading and too much vacuum on fuel sensor. We had to take the gas tank down and a lines above it was broken. $325 at the dealer for the part. Less than $40 for 2 at the junk yard. Problem solved. - Visitor
Check engine light came on took vehicle to repair shop found the erg valve was faulty. - Visitor
The throttle position sensor (TPS) may fail. Common symptoms of a defective TPS can be rough id...
My wifes Grand Marquis GS w(precision Track) has been getting a lower and lower Dist to empty o...
For a 2001 mercury grand marquis V8, give directions how to take off the fuel tank.
Been driving the car for years, never a single problem. Went out last night to grab some dinne...