P0420 Diagnostic Trouble Code Discussion for August 2015
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 | |
| 2004 Toyota Tacoma 2.4L MIL Lamp on VIN: 5TEVL52N24 P0420: Catalyst Efficiency Below Normal (Bank 1). removed and reworked cylinder head to repair a misfire on #3 cylinder. valves were burned and clearance was incorrect. head was repaired and reinstalled and vehicle runs fine, but consistently sets a cat eff code. converter and both front and rear sensors have... |
August 12, 2015 | |
| 2008 Jaguar XJ8 4.2L Misfire, MIL Lamp on VIN: SAJWA82CX8 P0420: catalyst efficiency bank1. Check engine light,P306,308,420. |
August 13, 2015 | |
| 2008 Jaguar XJ8 4.2L Misfire, MIL Lamp on VIN: SAJWA82CX8 P0420: catalyst efficiency bank1. Check engine light,P306,308,420. |
August 14, 2015 | |
| 2004 Hyundai Elantra GT 2.0L Limited to 100kph VIN: KMHDN56D74 P0420: Catalyst Efficiency Below Normal. Brought the girlfriends car in for LOF and rotation. on the way home I got on the highway and as I accelerated into traffic the TCS lamp began flashing and I couldnt drive any faster than 100kph/~62mph. Any throttle input after that point leads to a rise in rp... |
August 27, 2015 |
