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28/02/2021 5:41 pm
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Hey Scotty,
I have the above issue. I've had the CAT replaced 2x within the last 35k miles. Still having the same issue. I have checked the spark plugs and the ignition coils. I did notice that there's carbon buildup inside the system. not sure where it's coming from. no oil leaks anywhere. I'm at a loss.
P0240 is code for Turbocharger Boost Sensor B Range/Performance, but your engine is naturally aspirated 2.0L Ti-VCT I4. Did you mean P0420?
Yes it's code P0420. my bad.
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28/02/2021 7:00 pm
Did you mean P0420 (Catalyst System Efficiency Below Threshold)?
If so, see here for further troubleshooting:
https://www.obd-codes.com/p0420
