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Danny
Danny, Dodge Technician
Category: Dodge
Satisfied Customers: 566
Experience:  Dodge certified, Shop Foreman.
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po633 DTc on 2003 dodge ram 3500 5.9L diesel

Resolved Question:

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Submitted: 10 years ago.
Category: Dodge
Expert:  Danny replied 10 years ago.
PO633 Is a security fault you will have to take this one in to the dealer because after market scanners cannot communicate with the skim module . The module may be bad or there may be other codes stored in the skim.

Symptom:


P0633-SKIM SECRET KEY NOT ENTERED


When Monitored and Set Condition:


P0633-SKIM SECRET KEY NOT ENTERED


When Monitored: While the key is on.


Set Condition: The SKIM secret key was not calibrated into the ECM.


Possible causesOSSIBLE CAUSES


IMPROPER IGNITION KEY IS BEING USED


SKIM DTC’S


SKIM NOT CALIBRATED PROPERLY


TEST ACTION APPLICABILITY


1 With the DRBIIIt, read SKIM DTCs.


Are any SKIM DTC’s present?


ENGINE- 5.9L


DIESEL


Perform POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL).


No ! Go To 2


2 Verify that the proper ignition key is in the ignition lock on the steering column.


Are the proper keys being used?



Yes
! Go To next step


No ! Use the proper key for the vehicle.


Perform POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL).


3 Using the DRBIIIt, recalibrate the ECM with the proper SKIM secret key.


With the DRBIIIt, erase DTCs.


Cycle the ignition switch from on to off to on.


With the DRBIIIt, read DTCs.


Did the DTC reset?



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