Diagnostic Procedure
WARNING: This page is about a different car, the 2002 Buick Regal, 2002 Buick Century, 2001 Buick Regal, and 2001 Buick Century. However, it is still accessible from the selected car via links, so may be relevant.
- Did you perform the diagnostic system check? If so, go to next step. If not, see DIAGNOSTIC SYSTEM CHECK under SELF-DIAGNOSTIC SYSTEM.
- Did you perform the transmission fluid checking procedure? If so, go to next step. If not, perform the transmission fluid checking procedure. See appropriate AUTOMATIC article in TRANSMISSION SERVICING.
- 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 .
- 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, system is okay. If not, go to step 1 .