[gnx547]

On my 96 escort 1.9 I have a code P1443 Auxiliary emission controls. What emission controls would this be? The egr valve? O2 sensor?

 

[97DragScort]

On my 96 escort 1.9 I have a code P1443 Auxiliary emission controls. What emission controls would this be? The egr valve? O2 sensor?

P1443 - Very Small Or No Purge Flow Condition A fuel tank pressure change greater than a minus (-) 7 inches of H2 O in 30 seconds has occurred with purge (fuel vapor) flow less than 0.02 pounds per minute. Blocked fuel vapor hose between EVAP canister purge valve and FTP sensor.
Blocked fuel vapor hose between EVAP canister purge valve and engine intake manifold.
Blocked vacuum hose between EVAP canister purge valve-solenoid and engine intake manifold.
EVAP canister purge valve stuck closed (mechanically).
Check for blockages between the fuel tank, EVAP canister purge valve and engine intake manifold. Check obstructions in the EVAP canister purge valve diaphragm and ports.

all OBD-II codes w/ explanation can be found here : http://www.feoa.net/modules.php?name=Fo ... c&p=299849

Matt.

 

[gnx547]

where is the canister located? and how many vacuum lines are there on the canister?

 

[white-lightning]

If all the lines are fine it will be the evap purge flow sensor. My '96 threw the same code and different people replaced vacuum hose and the purge solenoid. I researched her for about an hour to find out it was defective on many from 1996. I replaced it in March and have not had it return. Napa is the only place that I could find the carried the sensor.

 

[gnx547]

So the canister has a purge valve and a solenoid?

 

[gnx547]

I found the canister below the air filter but I don't see an electrical connector on it, where is the purge valve located on the canister?

 

[white-lightning]

Follow the vacuum line that attaches to the bottom of your throttle body to the canister. The sensor will be closer to the tb than the purge solenoid. They both are in-line on vacuum hose, not physically on the canister.

 

[gnx547]

I cleared the code today and the service light did not come back on. So I guess it might be an interment problem.

 

[davecox]

From my own experience with this trouble code, and if I remember correctly, the OBD2 system runs a vacuum leakdown test to check for a leak in the evaporative storage cannistor, fuel tank and lines when the engine is at normal operating temperature and is only run when there is between 1/4 and 3/4 of a tank of fuel.

I replaced the control solenoid and the code wasn't set again for about three days. I thought I'd fixed it. Then I bought a few dollars worth of gasoline and the trouble code reappeared almost immediately.

Turned out to be the sensor itself. Once I replaced the sensor, the code never returned.