|
SMOG test coming
P0420 code (catalyst efficiency) is intermittent but persistent. I can clear it and shut off the CEL but if it takes a day or a couple weeks it always comes back.
By August 2, I have to have a successful SMOG test. So this is the perfect chance to test the efficacy of the cleaning method in the OP.
Suggestions? (take a look at the OP).
Also, I think I will try swapping the upstream and downstream O2 sensors in one last test to see if I have an intermittent sensor failure. Bad idea?
__________________
See my car's mod & maintenance thread and my electric bicycle's thread for ongoing projects. I will rebuild Black and Green over decades as parts die, until it becomes a different car of roughly the same shape and color. My minimum fuel economy goal is 55 mpg while averaging posted speed limits. I generally top 60 mpg. See also my Honda manual transmission specs thread.
|