99 Civic EX - P0420 Code older_hondaon Jun 11, 2009 Jul 10, 201807:34 PM byCeabiskett 12 22,318 Honda Civic / Del Sol (1992 - 2000) Suspension help - rattling/knocking sounds when going over bumps Liberty.Ron Apr 24, 2012
The Honda Accord P0087 sedan/coupe 2.4L engine code causes code P0420 in some cases. P0087 means the fuel rail's pressure is too low and P0420 means there is an issue with the catalyst's efficiency, which is often caused by fuel-mixture problems. The Honda Accord EVAP leak DTC - ...
The first thing you’re going to notice when you have a bad catalytic converter is a check engine light with a P0420 or a P0430 code. Another symptom would be a car that does not accelerate fast when you step on the gas. How to Fix a Bad Catalytic Converter You’ll need to confirm...
The code P1457 can be caused by a bad EVAP canister vent solenoid (Shut Valve) or EVAP bypass solenoid valve. They both are located at the charcoal canister at the back of the vehicle. The solenoid fails more often. Watch thesevideos. The code P0420 is usually caused by a failed cataly...
Re-flashed the 19.5 PSI basemap and disabled rev-hang, the P0420 catalyst efficiency DTC, enabled advanced VSA and enabled the "light ignition pullback, moderate throttle pullback" advanced VSA control strategy. 5/8/2023 update: 62k miles and still going strong I've been tuned in...