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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 214 (Automatic Transaxle Diagnosis - 4T65-E) >> Diagnostic Tests >> DTC P0218: Transaxle Fluid OVERTEMPERATURE >> Diagnostic Procedure

Diagnostic Procedure

WARNING: This page is about a different car, the 2003 Buick Regal and 2003 Buick Century. However, it is still accessible from the selected car via links, so may be relevant.
  1. Did you perform the diagnostic system check? If so, go to next step. If not, see DIAGNOSTIC SYSTEM CHECK  under SELF-DIAGNOSTIC SYSTEM.
  2. Install a scan tool. Turn ON the ignition, with the engine OFF. Record the Failure Records. Clear the DTCs. Perform the transmission fluid checking procedure. See CHECKING FLUID LEVEL & CONDITION under LUBRICATION in SERVICING - CENTURY & REGAL article. When done, go to next step.
    NOTE: Before clearing the DTC, use the scan tool to record the Failure Records. Using the Clear Info function erases the Failure Records from the PCM.
  3. Inspect for the following conditions:
    • Engine overheating due to low coolant level or restricted air flow.
    • Transmission fluid flow through cooler and/or auxiliary cooler (if equipped) is restricted due to low transmission fluid level, clogged filter, or leaking filter or seal. Plugged, kinked or damaged transmission fluid cooler pipes. Air flow through transmission fluid cooler and/or auxiliary cooler (if equipped) is restricted due to damaged fins or debris.
    • Line pressure low. See HYDRAULIC PRESSURE TESTS  under PERFORMANCE TESTS.

      Did you find and repair the condition? If so, go to next step. If not, see DIAGNOSTIC AIDS  .

  4. Perform the following procedure to verify the repair:
    • Install a scan tool.
    • Select DTC.
    • Select Clear Info.
    • Start and run the engine until it engine reaches normal operating temperature.
    • Select ENGINE RUN TIME and TRANS FLUID TEMP on the scan tool.
    • Drive the vehicle for 15 minutes.
    • Ensure that the transmission fluid temperature has stabilized and is less than 264°F (129°C).
    • Select SPECIFIC DTC.
    • Enter DTC P0218.

    Has the test run and passed? If so, proceed to next step. If not, go to step  2 .

  5. With a scan tool, observe the stored information, capture info and DTC info. If there are any DTCs that are displayed by the scan tool and have not been diagnosed, see appropriate SELF-DIAGNOSTICS article in ENGINE PERFORMANCE. If there are no more codes, the system is OK.
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