P0420 Diagnostic Trouble Code Discussion for January 2013
Catalyst Efficiency Below Normal (Bank 1)
Note: This is a professional automotive technician's resource.
Vehicle Owners: If you are seeking an automotive repair professional to service your vehicle, visit the iATN Repair Shop Finder.Trouble Ticket Help Requests for DTC P0420
| Help Request | Posted | |
| 2005 Honda Pilot EX 3.5L Excessive Emissions, MIL Lamp on VIN: 2HKYF18415 P0420: Catalyst Efficiency Below Threshold (Bank 1). ... CEL and stalling and no start a couple of times after timing belt job just done. Of course it everything was fine during my test drive after I initially completed the job... Scanned and found P0340 only. Inspected and found water in the CMP sensor connecto... |
January 21, 2013 | |
| 2005 Honda Pilot EX 3.5L Excessive Emissions, MIL Lamp on VIN: 2HKYF18415 P0420: Catalyst Efficiency Below Threshold (Bank 1). ... CEL and stalling and no start a couple of times after timing belt job just done. Of course it everything was fine during my test drive after I initially completed the job... Scanned and found P0340 only. Inspected and found water in the CMP sensor connecto... |
January 21, 2013 | |
| 2004 Cadillac SRX 4.6L Misfire, MIL Lamp on VIN: 1GYEE63A94 P0420: Catalyst System Low Efficiency (Bank 1). please help car has been back a few times we replaced the engine sometime in nov 29, car keeps coming back to our shop with different codes everytime we replaced engine, throttle body assy., coils, injectors,plugs |
January 22, 2013 |
