P0430, P3400, and P3497 Fault Codes on a 2007 Chrysler Aspen - How to Diagnose and Fix
I'm experiencing fault codes P0430, P3400, and P3497 on my 2007 Chrysler Aspen. I'd appreciate any guidance on how to interpret these codes and what steps to take next. P0430 - Catalyst System Efficiency (Bank 2) P3400 - MDS Rationality (Bank 1) P3497 - MDS Rationality (Bank 2) I'm considering checking engine oil pressure using a mechanical gauge and adding an engine oil treatment such as 'Risolone' to help reduce sludge or varnish buildup. Any advice would be greatly appreciated. Thanks, Raymond
Are there any other diagnostic trouble codes present? If not, start by investigating the MDS (Multi-Discharge System) related codes. Specifically: P0430 - Catalyst Efficiency (Bank 2) P3400 - MDS Rationality (Bank 1) P3-than 3497 - MDS Rationality (Bank 2) It's recommended to check engine oil pressure with a mechanical gauge and consider adding an oil treatment like 'Risolone' to address potential sludge or varnish issues that could affect engine performance.