For the last month I’ve been getting the P0420 code - I clear it off wit my obd2 - but it’s now popping up every 20-30km... no other codes. I have an app on my phone and could take other readings.
I took my car for inspection 6 months ago back (no probs or engine errors then) m and they told me exhaust lines or something there has a bunch of leaks that need to be welded up.
Also, I put in very cheap cats exactly 2 years and 4 months ago. 2 front and 2 rear - got them for $550 cdn all 4.
Could I start by welding up the leaks - would that take away the “vacuum” problem? I’ve heard this thrown around on this forum...
Or should I buy new cat(s) and what cat(s)?
WWYD?