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6E1–174 X22SE 2.2L ENGINE DRIVEABILITY AND EMISSION DTC P0402 EGR Excessive Flow Detected
Step Action Value(s) Yes No 1 Was the ”On–Board Diagnostic (OBD) System Check” — Go to Step 2 Go to OBD System Check 2 1. Review and record the Tech 2 Failure Records data. Tech 2 System Info Screen while operating the 3. Using a Tech 2, monitor “Diagnostic Trouble Code” info for Diagnostic Trouble Code P0401 until the 4. Note the test result. Does the Tech 2 indicate Diagnostic Trouble Code — Go to Diagnostic Aids Go to Step 3 3 1. Inspect the exhaust system for modification of original installed parts or leaks. 2. If a problem was found, repair exhaust system as necessary. Was a condition present that required repair? — Verify repair Go to Step 4 4 1. Remove the EGR valve. passages and the adapter for excessive deposits or 3. If a problem if found, clean or replace EGR system components as necessary. Was a condition present that required repair? — Verify repair Go to Step 5 5 1. Remove the EGR inlet and outlet pipes from the exhaust manifold and the intake manifold. 2. Inspect the manifold EGR ports and the EGR inlet and outlet pipes for a blockage caused by excessive 3. If a problem is found, correct the condition as necessary. Was a condition present that required repair? — Verify repair Refer to Diagnostic Aids |