Confused About PATS?
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Tuned
Joined: Apr 2003
Posts: 295
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From: Kountze, Texas
Confused About PATS?
I changed out the PCM in my 2002 F150. It is supposed to be programed to my truck but it won't start. When I turn the key to ON position the THEFT light flashes rapidly. The starter turns the engine over but it won't start. Is my problem the PATS ? I keep reading about different PATS systems and it gets confusing. What should I do next?
Lead Driver
Joined: Sep 2006
Posts: 7,907
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YES it is.
You cannot change these systems without reprogramming because they work with each other to provide the Theft deterrent feature.
Otherwise it would be easy to defeat and of no value like you just found out..
It's dealer time and you need two keys for reprogramming..
Good luck.
You cannot change these systems without reprogramming because they work with each other to provide the Theft deterrent feature.
Otherwise it would be easy to defeat and of no value like you just found out..
It's dealer time and you need two keys for reprogramming..
Good luck.
Hotshot
Joined: Jan 2004
Posts: 19,762
Likes: 1,079
From: St Louis
The PCM, the instrument cluster, and the "chipped" keys are all "married" to each other. You cannot simply substitute ANY of those components without them getting "re-married".
This "re-marriage" can be performed by anyone who has the proper equipment (dealer, mechanic, or DIY-er) and it must take place in the vehicle with all parties present.
Of course, all this skips over the obvious question: Why do you think you need a new PCM? They do not fail very often and are frequently mis-diagnosed.
This "re-marriage" can be performed by anyone who has the proper equipment (dealer, mechanic, or DIY-er) and it must take place in the vehicle with all parties present.
Of course, all this skips over the obvious question: Why do you think you need a new PCM? They do not fail very often and are frequently mis-diagnosed.
Hotshot
Joined: Jan 2004
Posts: 19,762
Likes: 1,079
From: St Louis
It's more than a "good possibility", it's confirmation that reprogramming PATS was skipped or failed.
While it's certainly possible that the PCM might be the cause of the EGR subsystem issues, there are many things much higher on the list of probabilities with the PCM being near the bottom of that list. Unless and until those more likely suspects were cleared, I'd be somewhat skeptical of this diagnosis. Since the person who made that diagnosis is also the one who failed to know that reprogramming the PATS would be a requirement and to tell you about that, I'm further skeptical about the original diagnosis.
Good luck.
While it's certainly possible that the PCM might be the cause of the EGR subsystem issues, there are many things much higher on the list of probabilities with the PCM being near the bottom of that list. Unless and until those more likely suspects were cleared, I'd be somewhat skeptical of this diagnosis. Since the person who made that diagnosis is also the one who failed to know that reprogramming the PATS would be a requirement and to tell you about that, I'm further skeptical about the original diagnosis.
Good luck.
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Tuned
Joined: Apr 2003
Posts: 295
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From: Kountze, Texas
Guess I didn't explain myself well. My brother who did all of the original diagnosis is not around to do the PATS or PCM install. He is well aware of what is involved.
The company I bought the replacement from supposedly flashed it to my VIN number but said they couldn't do the PATS. I was just trying to do this myself and since all I have is AutoEnginuity looks like I may have to go the dealer route.
The company I bought the replacement from supposedly flashed it to my VIN number but said they couldn't do the PATS. I was just trying to do this myself and since all I have is AutoEnginuity looks like I may have to go the dealer route.
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Lead Driver
Joined: Sep 2006
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The 1507 code is an error detected for idle speed too low. Should be 650 rpm +\- 50. Look at your Tach rpm reading, to see it.
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Code 443 is an EVAP Purge control valve operation error. A fuel tank test diagnostic failure.
Don't change or blame the PCM for doing it's job.
These faults are all engine hardware failures, not computer failures.
Fix the issues causing each code.
Good luck.
.
Code 443 is an EVAP Purge control valve operation error. A fuel tank test diagnostic failure.
Don't change or blame the PCM for doing it's job.
These faults are all engine hardware failures, not computer failures.
Fix the issues causing each code.
Good luck.