I think the VTM code 77 may be related to the EGR valve. I see references to VTM-4, code 77, EGR, and a TSB with pilots. I’ve seen weak O2 sensors on some Nissans …
code p0420 honda ridgeline Direct Download speed 7287 Kb/s
code p0420 honda ridgeline Full Version speed 5567 Kb/s
A P0420 code is a trouble code on OBD-II equipped vehicles. All vehicles from 1996-newer sold in North America support this generic powertrain code.
P0420 documents back to top of this page Below are links to Honda/Acura documents of two kinds: Technical Service Bulletins, and Honda Service News (HSN) issues.
Hey guys, got this code “P0420 Catalyst system efficiency below threshold (bank1)” from my dads 98 accord lx, just wondering ifs the o2
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