I have been having this issue where my car will stall or almost stall when placed in park. When I start the car there are no noticeable issues, and when I drive the car, or stop at lights there are also no noticeable issues. This only happens occasionally once I reach my destination and place the car in park the RPMs will drop significantly and go back up above 1000 to keep the car alive or stall completely. I have modified the car some with long tube headers and high flow catalytic converters, as well as a tune. There are two codes, P0420 and P0430, which I have been told is normal due to the O2 sensors having different readings of the high flow catalytic converters which is different than the stock readings, causing the codes. My tuner says my fuel numbers look great, and mechanics either can't replicate the issue or can't find what's causing it. Please help!
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have the same problem?
Wednesday, August 30th, 2023 AT 5:51 AM