P0420 Diagnostic Trouble Code Discussion for June 2021
Catalyst Efficiency Below Normal (Bank 1)
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| Help Request | Posted | |
| 2009 Subaru Outback 2.5i 2.5L Poor Idle Quality, Poor Idle Quality, Poor Idle Quality VIN: 4S4BP60C09 P0420: Cat inefficiency. ... ago with a bad clutch. When it came it was dropped off, it also had a crank but no start condition. I found no spark from the coil. Replaced the coil and it started and ran fine. Proceeded to the clutch job. That went smoothly. After I finished, I noti... |
June 07, 2021 | |
| 2008 Chevrolet Suburban 1500 LTZ 5.3L Excessive Emissions, MIL Lamp on VIN: 3GNFK16338 P0420: Catalyst system low efficiency B1. Hey IATN community, I have a head scratcher here, or maybe I'm just making a mountain out of a molehill. So, the vehicle came to my shop after multiple repairs elsewhere that did not fix issue. Issue was CEL, intermittent misfire, and intermittent low powe... |
June 12, 2021 | |
| 2012 Nissan Murano LE 3.5L no power VIN: JN8AZ1MU8C P0420: . ... drove here 20 miles but i dont see how because engine will not accelerate even in park most of the time you can put throttle on the floor and it wont rev a 1000 rpm but sometimes it will rev up but slow. did have p0420 but back pressure checks fine, i ... |
June 29, 2021 |
