P0420 Diagnostic Trouble Code Discussion for February 2016
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 | |
| 2000 Toyota Avalon XL 3.0L Misfire, MIL Lamp on VIN: 4T1BF28B2Y P0420: Catalyst Efficiency Below Normal (Bank 1). ... in my shop. Note I install VVT solenoid on #2 cylinder or left bank. After driving 4 miles after clearing computer trouble codes it set code P1354. Also I was wondering if the #2 not lining up perfect being 1/2 cog off wou... |
February 22, 2016 | |
| 2006 Jeep Wrangler Sport 4.0L Excessive Emissions, MIL Lamp on VIN: JF4F449S96 P0420: Catalyst Efficiency Below Normal (Bank 1). ... light keeps coming on, it first had the p2098, p2096 down stream fuel trim lean and the po431 catalytic converter codes, found a bulletin for the PCM reflash, we had that done , the light came back on ,replaced the front oxygen sensors, the light came back... |
February 23, 2016 | |
| 2009 GMC Acadia SLE 3.6L MIL Lamp on VIN: 1GKER13D89 P0420: catalyst efficiencybank 1. ... spark from the engines harmonic balancer while engine is running all the time except when the it is raining or damp out. The spark appears to be starting at the inner ring of the harmonic balancer and jumping the rubber molded ring and reaching the outer r... |
February 25, 2016 |
