Bobcat 553 P21C3 Error Code
P21C3 Error Code
DEF Main Heater Relay Short to Ground is the main cause of P21C3 error.A significant number of consequences can be suffered due to an overheating engine with code P21C3. The problem might be a blown gasket or something related to the fuel tank.
Tip For 553 Model
When the temperature is below -30 C (-20 F), hydrostatic oil must be warmed before starting. The hydrostatic system will not get enough oil at low temperatures and will be damaged. Park the machine in an area where the temperature will be above -18 C (0 F) if possible.