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6E1–259 X22SE 2.2L ENGINE DRIVEABILITY AND EMISSION RESTRICTED EXHAUST SYSTEM CHECK 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. Remove the HO2S2. D For removal procedures, refer to Heated 2. Install the Exhaust Backpressure Tester in place of the Bank 1 HO2S. 3. Idle the engine at normal operating temperature. Does the reading on the gauge exceed the specified 8.62 kPa (1.25 psi) Go to Step 5 Go to Step 3 3 With the exhaust back–pressure tester in place of Does the reading exceed the amount of the value 8.62 kPa (1.25 psi) Go to Step 5 Go to Step 4 4 1. Re–install the HO2S2. (Refer to Heated Oxygen Sensors in On–Vehicle Service for installation 2. Remove the HO2S1. or equivalent in place of the HO2S1. 4. Bring the engine to normal operating temperature while observing the gauge. 5. Increase the engine speed to 2000 RPM (allow 10 seconds for pressure build) and observe the gauge. Did the reading exceed the specified value? 8.62 kPa (1.25 psi) Go to Step 6 System OK 5 Repair a restiction in the exhaust system after the D Collapsed pipe D Internal muffler failure — Verify repair — 6 Replace the restricted catalytic converter. — Verify repair — NOTE: Diagnostic Trouble Codes will be set by running |