All right, engine light came on (for my '96 3000GT SL) and is reading off P0400, which is for emissions. At the moment there is a fairly large exhaust leak coming from the flex section of the downpipe. My question is, could the exhaust escaping from the flex section, that is, a lack of exhaust gas flow throughout the entire pipe, cause my O2 sensors to register a CEL for emissions? Or am I barking up the wrong tree, and that's not possible?

Say that the exhaust leak IS the problem. When I get it replaced or fixed (should be sometime over the next week), and the leak is gone, would simply erasing the engine code with the OBDII take care of everything?[/align]

 

Yes simply erasing the code should do it

 

Lol yeah I know I can erase the code, I've done it a few times and it keeps coming back on an hour later as P0400. I need to know if repairing the exhaust leak and THEN erasing the code would make sure it stayed off for good.

 

Yeah thats what i meant. It should

 

All right, cool man. Thanks for the help.