My check engine light came on with the code of PO420. Yesterday I got the flex pipe, extension pipe, resonator, axle pipe, muffler and hangers replaced. These parts has holes in them. The car is no longer as loud. However, it is is still exhibiting the same symptoms. The check engine light came back on immediately the car vibrates/pulsates when I am idling, it continues to makes a putt putt sound and feels like I am driving over a pile of rocks! It rides rough overall. Please help me out!
have the same problem?
Friday, March 9th, 2018 AT 6:40 AM