Index Chrysler Chrysler TOWN & COUNTRY, VOYAGER, Dodge Caravan - service repair manual 2001-2007 year
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Symptom List: P0420-CATALYTIC 1/1 EFFICIENCY Test Note: All symptoms listed above are diagnosed using the same tests. The title for the tests will be P0420-CATALYTIC 1/1 EFFI- When Monitored and Set Condition: P0420-CATALYTIC 1/1 EFFICIENCY When Monitored: Engine Run time greater than 90 seconds. Engine Coolant greater than 70°C (158°F) Vehicle speed greater than 20 MPH and less than 55 MPH. Engine Speed Set Condition: As catalyst efficiency deteriorates, the switch rate of the downstream O2 sensor approaches that of the upstream O2 sensor. If at any point during the test the P0432-CATALYTIC 2/1 EFFICIENCY When Monitored: Engine Run time greater than 90 seconds. Engine Coolant greater than 70°C (158°F) Vehicle speed greater than 20 MPH and less than 55 MPH. Engine Speed Set Condition: As catalyst efficiency deteriorates, the switch rate of the downstream O2 sensor approaches that of the upstream O2 sensor. If at any point during the test the POSSIBLE CAUSES GOOD TRIP EQUAL TO ZERO VISUALLY INSPECT CATALYTIC CONVERTER EXHAUST LEAK ENGINE MECHANICAL CONDITION AGING O2 SENSOR CATALYTIC CONVERTER 348 DRIVEABILITY - NGC |