Catalytic converter efficiency failure.
Trouble code P0420 means: Catalyst Efficiency Below Normal (Bank 1)
Code P0420 is: Upstream catalytic conveter efficency below threshold. Bring your car to your Dodge dealer and have them fix it under warranty. A 2003 Dodge Neon has a 5 year 50,000 mile warranty on emissions!
P0420 is catalytic converter efficiency failure.
Replace the catalytic converter.Replace the catalytic converter.
Trouble code P0420 means:Catalyst system efficiency below threshold
No.
Trouble code P0501 means:Vehicle speed sensor range/performace
No 2003 was a new refresh on the Neon, the shape and curviture are different.
Camshaft Position Sensor A- bank 1 Circuit Malfunction
Power steering pressure switch circuit performance.
Trouble code P0627 means: Fuel Pump Control Circuit / Open
Trouble code P0440 means:Evaporative emission control system malfunction