P0219 Engine overspeed


P0219 code - The Transmission Control Module (TCM) monitors the engine speed over the CAN bus. If engine speed is greater than a calibrated limit (see table), the TCM assumes that either the information from the Powertrain Control Module (PCM) is incorrect or that a major mechanical problem exist. One the DTC is set, the TCM will position the transmission gear into neutral to protect the engine and transmission from damage. The transmission will remain in neutral and will not be revaluated by TCM until the ignition is cycled.

When monitored is continuosly with the ignition on, engine running, with the transmission in gear with a valid Engine RPM message received at least once, and the CAN Bus Circuit an Engine CAN Message Missing are not active. Set condition this DTC the engine speed is greater than a calibrated limit (see table).

Possible causes P0219 code:

- Mechanical Engine Problem

- Mechanical Transmission Problem

- Powertrain Control Module (PCM)

- Transmission Control Module (TCM)

Diagnostic test P0219 code

Step 1. Check for other transmission DTCS

with the scan tool, check for other trasmission DTCs.

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

Yes, if speed sensor DTCs are present, perform their respective test first 

No, go to step  2.

Step 2. Check for PCM DTCS

With the scan tool, check for PCM DTCs.

Are ther any PCM DTCs present?

Yes, refer to Powertrain Control Module (PCM) DTC group and perform the appropriate diagnostic procedure.

No, go to step 3.

Step 3. Check if engine mechanical problem are present

Determine if any engine mechanical problem are present.

Are there ani engine mechanical problem present?

Yes, repair engine as necessary, perform the NAG1 Transmission Verification Test.

No, go to step 4.

Step 4. Check if transmission mechanical problems are peresent

Determine if any trasmission mechanical problems are present. Turn the ignition off to lock position. Remove the Transmission Oil Pan and inspect for excessuve debris or a plugged Transmission Oil Filter.

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

Yes, repair transmission as necessary, perform the NAG1 Transmission Verification Test.

No, go to  step 5.

Step 5. Test drive vehicle 

The engine and transmission must not have mechanical problem and operating normally before proceeding with this test.

Replace and program the Powertrain Control Module (PCM).

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, using the schematics as aguide, 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 problem are found, replace the TCM in accordance with the service information.

No, test complete.

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