Bobcat 5600 P0421 Error Code
P0421 Error Code
DOC Efficiency Fault (During Regen) is the main cause of P0421 error.A significant number of consequences can be suffered due to an overheating engine with code P0421. The problem might be a blown gasket or something related to the fuel tank.
Tip For 5600 Model
Operate as slow as possible and avoid sudden changes
in lever direction.
Avoid travelling over objects such as rocks, trees,
stumps, etc.
Stop the machine before moving the upper equipment
controls. Never allow the blade to strike a solid object.
Damage to the blade or hydraulic cylinder can result.