Mercury Sable 2002 95000 miles

JOESACK

MEMBER
2002 MERCURY SABLE

My car has low EGR flow. Pulled line from valve and no vacumme at 2000 rpm. Vacume at selenoide.
Powered solinide vacume at EGR valve engine slows than stalls. Believe it is the "EGR Backflow Sensor" causing the problem. Would that be a logical conclusions?

3 Replies

2CARPRO JACK

MECHANIC
11,533 POSTS

Sounds about right, replaced a bunch of those. For some reason they only last a little while. Once they go out of range, the MIL comes on for "insuff EGR flow"

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Tuesday, January 2nd, 2007 AT 2:49 PM

JOESACK

MEMBER
2 POSTS

Thank you. If this works will the light go off after a couple cycles on its own or will I need a "Code Reader" to clear the code?
Will unhooking the batery work since I do not have a code reader. I had the codes read for free at Advanced Autoparts so I could go back if I have to but I feel guilty since they did not have the sensor I needed.

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Tuesday, January 2nd, 2007 AT 3:12 PM

MATHIASO

MECHANIC
1,209 POSTS

For your last question:
1/Fix the problem once the cause has been found
2/ Erase the computer code
3/ Test the vehicle to see if the symptom is gone
4/ Retest the computer to make sure the same code didn't reappear.

Your last question was removing the egr sensor to be a logical conclusion because everything pinpointed at it right?
The DTCs for the exhaust gas resirculation system will usually be set for one of the three reasons:
A control circuit fault, a no-or low-flow condition, or an excessive-flow or flow-when-not-commanded condition.
The DTC should identify the problem area but not NECESSARY the component at fault.
Once the DTC is retrieved, consult the service manual to determine the necessary tests to be performed to isolate the cause of the code.
My conclusion is, you may change the egr sensor to solve the problem now but do not be surprise if the same problem come back in few months. Or year.

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