Check Engine Code P1443

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  #1  
Old 05-25-05, 09:35 PM
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Question Check Engine Code P1443

1996, Ford, Escort LX, Auto, 1.9L, Wagon, 112,xxx miles.

Check Engine light came on and is on most of the time. Code read at Autozone = P1443. No performance problems noted. No attempts made to fix it yet because I have no idea where to start.
 
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Old 05-26-05, 08:55 AM
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That's an evaporative emission system code; I know because my daughter's Escort has the same code. Haven't really troubleshot it much yet beyond checking for leaks in the vacuum lines, mainly because it does not affect performance. Not much to the system - charcoal storage cannister, couple of solenoids, and some hoses and tubes. Just priced the parts at Ford the other day in anticipation of getting into it; one solenoid is $34 and the other is just over $100. They're dealer parts, which is why AutoZone didn't try to sell them to you. Check for defective hoses and vacuum lines first. Also if it only occurs right after gassing up, don't fill tank as full (my daughter's light comes on even at half tank, so not a factor in her case).

Maybe one of the pro's can give us some insight on common failures.
 

Last edited by the_tow_guy; 05-26-05 at 09:06 AM.
  #3  
Old 05-27-05, 02:00 PM
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Preliminary Checkout


OK, Checked Haynes Manual and 1966 Escort Tracer Electrical and Vacuum Troubleshooting Manuals. Nothing Learned from either.

Checked engine Vacuum = 16 inches at idle. Disconnected top hoses one at a time and sealed port - no change of Vacuum. Vacuum diagram inside of hood is very over-simplified and non-informative. The ford vacuum troubleshooting manual has a better one.

Found two vacuum controls in front of battery below air intake from MAF to throttle body. One has 3 wires and is black plastic (F57E-14A606-AA). The other has 2 wires and is a metal cyllinder about 1 1/2" D & 2 " long
(E5TF-9C915-AA), also has B0296B on it. Which of these parts is the less expensive and which is more likely to fail? Can I perform any tests to determine if one of these is failing? Should I swap out the gas cap first?
 
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Old 05-27-05, 03:00 PM
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It's my understanding that particular code does not relate to the gas cap. Can't speak to the parts question, but those are the two major components other than the cannister itself. Check with Ford on which is which if you are going to do a trial and error. You'll need the calibration code which you'll find on a sticker on the driver's side door jam. Was hoping one of the Ford pro's would ring in (helloooooo Fordtech) and give us some insight. Be sure and post back if you change something and it works. The way things go is that it will probably be the more expensive of the two, but you won't find that out until you've already bought the (non-returnable) less expensive one. There are test procedures to troubleshoot the system, but you'll probably need access to Alldata or similar to get them.
 
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Old 05-27-05, 04:14 PM
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I haven't seen Fordtech here in a long time, or Davo or Desi.
 
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Old 05-28-05, 12:04 AM
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Old 05-28-05, 10:19 AM
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Thanks, Cobra. Saved me the trouble of sponging off one of our Alldata-equipped garages for the info. I notice is says "mid-year 4.0L SOHC Explorer only" so I'm hoping the troubleshooting is the same; can't imagine why it would differ. Now just have to find TIME to work on it.
 
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Old 05-28-05, 12:53 PM
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Post Progress?

Matched color codes of wires to Ford Electrical/Vacuum Manual.
3 wire black plastic (F57E-14A606-AA) is the EVAP Purge Flow Sensor(not present on 93 Escort-OBD1). The other 2 wire metal cyllinder (E5TF-9C915-AA) is the EVAP Canister Purge Valve(present on both 96 and 93 Escorts).
I removed the Canister to inspect it and also removed the hose from the Purge Valve to the Canister. The hose has a large grove worn thru it, so I replaced it, although this would create the opposite condition from being obstructed as in the description link supplied fpr P1443.

I assume that if this was the problem, the lite will eventually go out. Is it starting the engine X # times that does it? If not, I think all that is left is the purge valve and the hose from the flow sensor to the purge valve.

How many cycles before the lite can go out? If it doesn't, I am considering swapping purge valves with the 93, unless the electrical connectors are different.

Hopefully, I can fix this before the end of July so it will pass inspection.
 
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Old 05-31-05, 05:07 PM
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Question Check Engine Lite still on?

After replacing the bad hose, I went back and reverse-flushed the canister purge valve and the purge flow sensor with gasoline. How long does it take for the lite to go out if the failure is corrected? Does the engine need to be started and stopped x number of times? Does this include a warmup each time? Or do I need to reset it and see if it comes on again?
 
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Old 06-01-05, 04:55 AM
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Just drive it for a while, rexx. Oddly enough I think I fixed my daughter's over the weekend. Yanked out the air cleaner box for access and removed the sensor and solenoid for a look-see. Appeared the purge valve was stuck partially open. Flsuhed the passages in both with some cleaner (after which the purge valve seated fully closed) and reinstalled. Still had the light (think this was Sunday a.m.) but last night it was out, so only a short time for it to reset itself.
 
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Old 06-10-05, 08:10 AM
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Thumbs up The light went out!!!

Now if it will as least stay out thru July until I get thru the NYS Inspection!

If this works, it involved no expensive Ford-only replacement parts, just a vacuum hose and reverse-flushing of the purge sensor and canister purge valve. A fair amount of dirty work, but worth it for the knowledge gained.
 
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