P0420 Diagnostic Trouble Code Discussion for February 2024
Catalyst Efficiency Below Normal (Bank 1)
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| Help Request | Posted | |
| 2008 Lexus IS250 2.5L MIL Lamp on VIN: JTHCK26268 P0420: Catalyst B1. ... on. Pulled codes and saw P0430 P0420 Cat B1 and B2. Visual inspection of Cats pass, no loose debris in cat and vehicle runs good plenty of power. Installed 5 gas analyzer and noticed once hot and off idle that the NOX readings were within allowable pa... |
February 12, 2024 | |
| 2008 Lexus IS250 2.5L MIL Lamp on VIN: JTHCK26268 P0420: Catalyst B1. ... on. Pulled codes and saw P0430 P0420 Cat B1 and B2. Visual inspection of Cats pass, no loose debris in cat and vehicle runs good plenty of power. Installed 5 gas analyzer and noticed once hot and off idle that the NOX readings were within allowable pa... |
February 16, 2024 |
