1996 Mercury Cougar P0401 EGR

SONJER

MEMBER
3 POSTS

have a 1996 mercury cougar 4.6 v8. 110,000 miles, i have tried to remove the sensor from the bracket at the firewall with success, but i can't get the two rubber vacuum hoses off of the sensor. once the sensor is removed there's no slack at all to work the hoses off. i had 0401 computer code come up and was told that i needed an egr solenoid and a an egr sensor. the solenoid was easy ,i also replaced the egr valve. but the sensor is frustating. all comments are appreciated.

Feb 2, 2007 at 12:26 AM

MERLIN2021

✓Experienced Mechanic
17,250 POSTS

before you change the sensor take the erg valve off and see if the channel in there is clogged with soot. if so clear it out right to the throttle body, then clear the code and see if the light comes back on, I have never seen the need to replace ALL these parts at once! Don't forget about me Vote!

Mar 3, 2007 at 11:31 PM

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Suggested Repair

Before replacing the EGR sensor, remove the EGR valve and inspect the passage for soot. Clean the channel all the way to the throttle body, clear the code, and see whether the light returns.

Conversation Summary

The owner of a 1996 Mercury Cougar 4.6 V8 with a P0401 code could not remove the vacuum hoses from the EGR sensor after already replacing the EGR solenoid and valve. The expert advised checking and cleaning soot from the EGR passage to the throttle body before replacing more parts, then clearing the code to see if it returns.

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1996 Mercury Cougar P0401 EGR

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