P0421 : Warm up catalyst efficiency below thresh hold bank 1
P0421 code = Warm up catalyst efficiency below threshold, Bank 1
P0421 : Warm up catalyst efficiency below thresh hold bank 1
Trouble code P0421 means:Warm up catalyst system efficiency below threshold
Trouble code P0421 means: Catalyst Efficiency Below Normal (Bank 1)
Trouble code P0421 means:Warm up catalyst system efficiency below threshold
Trouble code P0421 means: Catalyst Efficiency Below Normal (Bank 1)
Trouble code P0421 means: Catalyst Efficiency Below Normal (Bank 1)
Trouble code P0421 means: Catalyst Efficiency Below Normal (Bank 1)
An error code P1684 from an OBDII code reader indicates that the battery had recently been disconnected. This is normal if a new battery was installed but can indicate a connection issue or grounding problem.
When this code come out may be haven no enough warm up on the catalyst is efficienecy the vehicle has an exhaust leak
Trouble code P0780 means: Shift malfunction
Passenger side and after the catalytic converter O2 sensor.