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Joined: Jan 2004
Posts: 383
CEG\'er
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OP
CEG\'er
Joined: Jan 2004
Posts: 383 |
Alright. I just got yet another check engine light this morning, so I popped the scanner on it.
It came back PO171/PO174 again ( I still haven't found the problem) and something else under the test results.
Here it is, word for word from the scanner:
TestID $41 Fail
ComponentID $12
Fail High
FFCE not <= 0200
Delta Pressure for
Downstream DPFE
Hose Test
Could this mean my egr is blocked, or one of the hoses going into the DPFE is blocked/leaking? I did an EGR test and that passed so I'm completely out of ideas.
Any input, as always is much appreciated!
Sean
'99 Silver SVT Contour
(2000 miles since June, now needs new front brakes and bearings)
'98 CBR900RR Again
(Put away for the winter)
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Joined: Jan 2004
Posts: 383
CEG\'er
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OP
CEG\'er
Joined: Jan 2004
Posts: 383 |
'99 Silver SVT Contour
(2000 miles since June, now needs new front brakes and bearings)
'98 CBR900RR Again
(Put away for the winter)
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Joined: Aug 2002
Posts: 35
New CEG\'er
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New CEG\'er
Joined: Aug 2002
Posts: 35 |
P0171 & P0174 usually means you have a bad MAF, defective O2 sensor, misfire, or fuel injector problem. try cleaning the MAF with non chlorinated brake parts cleaner. Next change your spark plugs if you don't know how old they are, you can remove and re-gap and replace with the same ones if they don't look to bad the gap is .052-.056. If your lucky you know somebody with real time scanner that can monitor your O2 sensors to make sure they are working properly Look at the MAF output at the same time and if either the O2 or MAF don't look right replace them. If all of that doesn't help you might consider having a professional fuel injector cleaning at a shop usually 75-100 bucks.
97_contour _sport
Added T-red wing
Cougar big brakes
DMD pulley
SS brake lines
Ford 9mm wires
21mm BAT bar
SVT motor mount
ES bushings
Metal water pump
ST200 badges & mats
ST200 UIM/LIM
Cold air intake
BAT Y-pipe
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Joined: Oct 2002
Posts: 2,408
Hard-core CEG'er
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Hard-core CEG'er
Joined: Oct 2002
Posts: 2,408 |
Originally posted by 99CSVT:
TestID $41 Fail
ComponentID $12
Fail High
FFCE not <= 0200
Delta Pressure for
Downstream DPFE
Hose Test
Either the EGR flow is low from partial blockage, or the DPFE is going out. Neither will register as an inoperative EGR valve since the DPFE is still reading a change at the secondary port, it just does not pull down low enough.
"Those who cannot remember the past are condemned to repeat it" -George Santayana
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Joined: Apr 2003
Posts: 9
Newbie
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Newbie
Joined: Apr 2003
Posts: 9 |
This is a very common Ford fault code as I learned from my net surfing for PO174 - Insufficient EGR Flow. I had this nagging problem on my 2002 Moutaineer - I changed the EGR - cleared the code - code came back. Change the DPFE - cleared the codes - problem solved!
As always with my luck - Ford just put out a TSB for the 'Mounty' related to problems with the DPFE switch. I would say that is your problem.
99 Countour SVT
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Joined: Jan 2004
Posts: 383
CEG\'er
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OP
CEG\'er
Joined: Jan 2004
Posts: 383 |
Thanks for the replies guys! I've done enough work on the Contour these past three weeks (uim/lim, plugs, wires, new tires) and was thinking of replacing the DPFE anyway. I'm taking a trip up to Indianhead this weekend so I'll just work on it when I get back.
Thanks again!
Sean
'99 Silver SVT Contour
(2000 miles since June, now needs new front brakes and bearings)
'98 CBR900RR Again
(Put away for the winter)
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