Diagnostic Test

WARNING: This page is about a different car, the 2005 Jeep Grand Cherokee. However, it is still accessible from the selected car via links, so may be relevant.

1) CHECK FOR OTHER TRANSMISSION DTCS
With the scan tool, check for other transmission DTCs.

Are there any gear ratio and/or speed sensor DTCs present in addition to P0219?

Yes
1. Refer to the Symptom Category and perform the appropriate symptom. If speed sensor DTCs are present, perform their respective test first.
No
1. Go To step 2).
2) CHECK IF ENGINE MECHANICAL PROBLEMS ARE PRESENT
Determine if any Engine mechanical problems are present.

Are there any Engine mechanical problems present?

Yes
1. Repair engine as necessary. Refer to appropriate ENGINE-SERVICE INFORMATION article for the appropriate repair procedures.
No
1. Go To step 3).
3) CHECK IF TRANSMISSION MECHANICAL PROBLEMS ARE PRESENT
Determine if any Transmission mechanical problems are present.

Turn the ignition off to the lock position.

Remove the Transmission Oil Pan and inspect for debris or a plugged Transmission Oil Filter. Refer to SERVICE INFORMATION - NAG1 for the appropriate service procedures.

Is there any debris, plugged Transmission Oil Filter, or signs of an internal transmission problem?

Yes
1. Repair Transmission as necessary. Refer to SERVICE INFORMATION - NAG1 for the appropriate service procedures.
No
1. Go To step 4).
4) TEST DRIVE VEHICLE
NOTE: The Engine and Transmission must not have mechanical problems and be operating normally before proceeding with this test.

Replace and program the Powertrain Control Module (PCM) per the Service Information. Refer to ELECTRONIC CONTROL MODULES - SERVICE INFORMATION for the appropriate service procedures.

Reassemble any previously disconnected connectors and/or components.

With the scan tool, erase Transmission DTCs.

Road test the vehicle.

With the scan tool, read Transmission DTCs.

Did DTC P0219-ENGINE OVERSPEED reset?

Yes
1. Using the schematics as a guide, check the Transmission Control Module (TCM) terminals for corrosion, damage, or terminal push out. Pay particular attention to all power and ground circuits. If no problems are found, replace the TCM per the Service Information. Refer to ELECTRONIC CONTROL MODULES - SERVICE INFORMATION for the appropriate service procedures.
2. Perform NAG1 TRANSMISSION VERIFICATION TEST - VER 1 .
No
1. Test Complete
2. Perform NAG1 TRANSMISSION VERIFICATION TEST - VER 1 .