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6E–205 3.2L ENGINE DRIVEABILITY AND EMISSIONS Excessive Exhaust Emissions or Odors Symptom (Cont'd) Step No Yes Value(s) Action 12 1. Remove excessive carbon buildup with a top engine cleaner. Refer to the instructions on the top engine 2. Perform the exhaust emission test. Does the vehicle pass the test? — System OK Go to Step 14 13 Perform the exhaust emission test. Does the vehicle pass the test? — System OK Go to Step 14 14 Does the exhaust emission test indicate excessive CO — Go to Step 15 Go to Step 16 15 1. Check items that can cause the engine to run rich. Refer to Diagnostic Aids in DTC P0172 Diagnostic Support. Make any necessary repairs. 2. Perform the exhaust emission test. Does the vehicle pass the test? — System OK Go to Step 17 16 1. Check items that can cause the engine to run lean. Refer to Diagnostic Aids in DTC P0171 Diagnostic Support. Make any necessary repairs. 2. Perform the exhaust emission test. Does the vehicle pass the test? — System OK Go to Step 17 17 1. If a problem is found, repair as necessary. Was a problem found? — Go to Step 13 Go to Step 18 18 1. Check for an engine mechanical problem. Perform a cylinder compression check (refer to 2. If a problem is found, repair as necessary. Was a problem found? — Go to Step 13 Go to Step 19 19 1. Review all diagnostic procedures within this table. malfunctions have been found, review/inspect the D Visual/physical inspection D Tech 2 data D Freeze Frame data/Failure Records butter D All electrical connections within a suspected 3. If a problem is found, repair as necessary. Was a problem found? — Verify repair Contact Technical Assistance |