P0420 Diagnostic Trouble Code Discussion for January 2023
Catalyst Efficiency Below Normal (Bank 1)
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| Help Request | Posted | |
| 2016 Ram 2500 Tradesman 6.4L MIL Lamp on VIN: 3C6UR5HJ7G P0420: Catalyst efficiency below threshold. ... 2016 Ram with a 6.4 engine came in with a misfire and SES light flashing. Found a flat cam lobe on #5 cylinder. Ending up replacing camshaft and lifters from the dealership (all, regular and MDS), timing chain components, oil pump, VVT sprocket and... |
January 05, 2023 | |
| 2016 Ram 2500 Tradesman 6.4L MIL Lamp on VIN: 3C6UR5HJ7G P0420: Catalyst efficiency below threshold. ... 2016 Ram with a 6.4 engine came in with a misfire and SES light flashing. Found a flat cam lobe on #5 cylinder. Ending up replacing camshaft and lifters from the dealership (all, regular and MDS), timing chain components, oil pump, VVT sprocket and... |
January 06, 2023 |
