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Home >> GMC >> 2007 >> Yukon Denali >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 3 (Automatic Transmission - 4L60-E/4L65-E/4L70-E - DTC P0218 To DTC P0961) >> DTC P0218 >> Test Description

Test Description

WARNING: This page is about a different variant/trim than selected.

The numbers below refer to the step numbers on the diagnostic table.

  1. 3:  This step inspects for air flow restrictions or damage which may result in the transmission overheating.
DTC P0218

Step Action Yes No
1 Did you perform the Diagnostic System Check - Vehicle? Go to Step 2  Go to Diagnostic System Check - Vehicle
2
  1. Install a scan tool.
  2. Turn ON the ignition, with the engine OFF.
    3. IMPORTANT: Before clearing the DTC, use the scan tool in order to record the Failure Records. Using the Clear Info function erases the Failure Records from the TCM.
  3. Record the DTC Failure Records.
  4. Clear the DTC.
  5. Inspect for correct transmission fluid level.

    Refer to Transmission Fluid Checking .

Did you perform the fluid checking procedure?		 Go to Step 3  Go to Transmission Fluid Checking
3 
  1. Inspect the engine cooling system and transmission cooling system for the following conditions:
    • Air flow restrictions
    • Air flow blockage
    • Debris
  2. Inspect the transmission cooling system for damaged cooler lines.
  3. Test the oil cooler flow.

    Refer to Automatic Transmission Oil Cooler Flushing and Flow Test (J 45096) or Automatic Transmission Oil Cooler Flushing and Flow Test (J 35944-A) .

Did you find and correct the condition?		 Go to Step 6  Go to Step 4 
4 Test for correct line pressure.
Refer to Line Pressure Check .
Did you find and correct the condition?		 Go to Step 6  Go to Step 5 
5 Test the torque converter stator.
Refer to Torque Converter Diagnosis .
Did you find and correct the condition?		 Go to Step 6  Go to Testing for Intermittent Conditions and Poor Connections
6 Perform the following procedure in order to verify the repair:
  1. Install a scan tool.
  2. Select DTC.
  3. Select Clear Info.
  4. Start and idle the engine until it reaches normal operating temperature.
  5. Monitor Trans. Fluid Temp. on the scan tool.
  6. Drive the vehicle for 10 minutes.
  7. Ensure that the transmission fluid temperature has stabilized and is 129°C (264°F) or less.
  8. Select Specific DTC.
  9. Enter DTC P0218.

Has the test run and passed?		 Go to Step 7  Go to Step 2 
7 With the scan tool, observe the stored information, capture info, and DTC Info.
Does the scan tool display any DTCs that you have not diagnosed?		 Go to Diagnostic Trouble Code (DTC) List - Vehicle System OK
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