Engine Oil Change and P0420?

That is normal from the fluid being thrown around.

No issues there.

Roy

Hey in reference to the P0420 above, can that occur due to an evap leak? I had that code and a gross leak evap code. I replaced the purge solenoid and both codes have disappeared, and engine light off but p0420 is now labeled as a historic fault if I scan the system.

No, there is no connection of the codes.

The 420 may be cleared but will come back. It has to fail its own internal test 3 times and light will come back.

Clearing codes does nothing as the issue needs to be addressed.

Roy

I understand that, but I'm used to the p0420 coming back immediately.

It should not comeback right away. It is a 3 trip reset. When you clear it, all it does is make the ECM forget the code.

Roy