2000 Ford Expedition 5.4 Catalyst And Evap Monitors Wont Pass

Christopher Service Manager California Posted   Latest  
Resolved
Emissions
2000 Ford Expedition Eddie Bauer 5.4L (L) 4-spd
P1000 — Manufacturer Controlled DTC
Catalyst And Evap Readiness Wont Set

Hi all. We have a 2000 Ford Expedition with the 5.4L. All readiness has set except catalyst and evap. We originally found the thermostat failing and ect was reading 150 degrees max temp. we replaced that and verified ect reads ~190 at full temp. We have performed multiple drive cycles and cant get the cat monitor to set. We verified cats store oxygen for conversion and are pretty healthy despite 180k miles. all oxygen sensors report correctly and respond in time. fuel level is between ½ and ¾. We pulled battery cables and touched them together to reset the PCM. Basically everything checks out but this guy wont set these two monitors. Any ideas or help would be GREATLY appreciated. 

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Glenn Owner/Technician
Texas
Glenn
 

Hello Christopher, You need to perform the Ford drive cycle procedure a couple of times usually to get the monitors to run.

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Zachary Mobile Technician
Texas
Zachary
 

If you go to motorcraftservice​.​com and click the free resources tab, Ford has all of their OBD2 theory and operation laid out by model year from 1996 to 2019, both gas and diesel. It's worth reading in general because it helps shed light on things, but will give Ford's exact criteria for those 2 monitors in that model year. You can compare this to the information you're operating…

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Christopher Service Manager
California
Christopher
 

That link is extremely helpful, surprised we've never seen this before. Thank you!

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Zachary Mobile Technician
Texas
Zachary
 

No problem! Ford has some pretty good stuff on that free resources tab. Well worth looking through.

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Cliff Diagnostician
California
Cliff
 

Ford vehicles typically require in-town driving before you drive it at highway speeds. I usually do about a 3-mile drive in town with stop-and-go traffic then hit the highway. Usually runs all but evap in one complete drive from a cold start.

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Rob Mechanic
California
Rob
 

Check the mode 6 data to see what is off.

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Angelo Instructor
Missouri
Angelo
 

All Mode six data from a capable scanner should be copied/pasted in this post for analysis. Also entire warm-up cycle (ECT) and fuel level signal should be data-logged during vehicle operation and checked for intermittent signal loss. Also FTP should be examined. Check O2 sensors and make sure they are OE.

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Glenn Owner/Technician
Texas
Glenn
   

Hi Christopher, To add to my earlier reply: Make sure once you start doing the Drive Cycle Procedure, Do Not clear any codes with the scanner, this will cause you to have to repeat the process needlessly. Only check for pending codes other than p01000 (if any are present) All Data also has the full procedure requirements.

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Darren Technician
Wisconsin
Darren
 

Are downstream o2 sensors hovering around 700 mV

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Chris Technical Support Specialist
New York
Chris
 

Biased FTP can trigger no faults but still prevent monitors. FTP values Key on engine off should read approx 2.6V Every once in a while you'll catch one with no codes that reads just over 4V with no change when gas cap is removed.

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Rusty Owner/Technician
Massachusetts
Rusty
 

If you have the capability to show Mode 6, could you post a screenshot that shows the switch ratio of both banks?

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Alejandro Technician
California
Alejandro
 

If I remember correctly the cat monitor completes in stop and go traffic And or in city driving with stop lamps. The evap I Believe need a hot to cold soak.

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Christopher Service Manager
California
Christopher Resolution
   

So much god information from you all, thank you. It took 6 drive cycles to set the catalyst monitor. We finally got it set after 3 days of battling this thing. We used the link Glenn Hunt provided and checked every parameter per the Ford data set and everything was in spec. We've never had a vehicle take so many drive cycles to set before.

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Glenn Owner/Technician
Texas
Glenn
 

Hi Christopher, Thanks for the mention, but Zackary sent the link, I just made recommendations. Ford and GM can be difficult just to mention a couple. The idea years ago, especially in California was to catch/prevent people who were cheating emissions standards. As you know CARB has some strict regulations. Most vehicles have a time-consuming procedure to reset all monitors. A P1000 code is a…

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Mark Owner/Technician
California
Mark
 

I see you completed drive cycle but in the some may find the drive cycles posted at rlescalambre​.​com work the best. I just had a 97 corolla that would not set the O2 monitor on the dyno, but when I drove that POS home it ran. I followed the trace as written on dyno and it just would not run. No ABS or TCS, plain corolla ce.

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