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2010 Ford Taurus Limited 4dr Sedan FWD

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Front Wheel Drive, 4 Door Sedan, Large Cars
18 mpg city / 27 mpg hwy

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April 11, 2011, 12:04 pm

AutomotiveForums M

Question: P0402 Error

i have a 2000 ford taurus 3.0L OHV (pushrod) engine. i am encountering almost violent forward urges while stopped in drive, almost as if the car is attmempting to shift into a gear while i am currentlt stopped. if i shift into nuetral the engine idles slightly higher than if i was stopped in drive, but does not have that forward urging. i took the vehicle to autozone and got a free check engine diagnosis and the machine returned a p0402 error and said that it was def the EGR vavle and possibly some sensor. so i got home and took my EGR valve off and it looks dirty and im not sure if im getting full range of motion but it looks physically ok. i read some posts and saw that this could be a common problem that could not be related to my EGR valve. do you have any information that would help? is this a common problem with this year/engine taurus? should i replace the EGR ($40 not a big deal...)? or is there another problem that is causing this almost violent "forward urging"?

April 11, 2011, 1:43 pm

AutomotiveForums M

Update:
took off the EGR and cleaned it with wd40. ROM seemed much smoother. re-installed the EGR. i first started the car and forgot to replace to pressure hose on top of the EGR. it seemed to run fine. then i noticed the hose was off, so i put it back on. the car then ran like it used to and the old problem reappeared. i took the hose back off and test drove. all the problems were gone. do i need this hose? will it hurt anything to temporarily leave it off? does this new information help any other diagnosis?

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