P0420 Diagnostic Trouble Code Discussion for February 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 | |
| 2002 Jaguar X-Type 2.5L Misfire, MIL Lamp on, Limp-home- mode VIN: SAJEB51DX2 To the group, when I first drove this vehicle the Limp-Home- Mode would engage at 3000 rpm to prevent Cat damage,Too many Misfire indications. Actually the vehicle drove and accelerated very well. I cleaned all the grounds in the front of the engine compartmen... |
February 11, 2015 | |
| 2007 Cadillac Escalade 6.2L Poor Idle Quality, MIL Lamp on VIN: 1GYFK63807 P0420: Catalyst System Low Efficiency (Bank 1). ... months ago for a hot stalling and no start that was cured by replacing cam phasers. It has come in many times since for the p0420 and no other codes. Any help would be appreciated. Thanks Tom |
February 12, 2015 | |
| 2002 Jaguar X-Type 2.5L Misfire, MIL Lamp on, Limp-home- mode VIN: SAJEB51DX2 To the group, when I first drove this vehicle the Limp-Home- Mode would engage at 3000 rpm to prevent Cat damage,Too many Misfire indications. Actually the vehicle drove and accelerated very well. I cleaned all the grounds in the front of the engine compartmen... |
February 21, 2015 | |
| 2003 Toyota Camry LE 3.0L MIL Lamp on VIN: 4T1BF32K73 P0420: Catalyst Efficiency Below Normal (Bank 1). ... recurring P0420. It had been setting consistently for months. The oxygen absorption was in the 1-2 second range for both banks, so we replaced them with Walker cats along with the AF and O2 sensors from Denso. A few months later, the code came back and aft... |
February 25, 2015 |
