Bobcat T590 P20B4 Error Code
P20B4 Error Code
DEF Tank Heating/Coolant Valve Short to Battery is the main cause of P20B4 error.To solve P20B4 locate and open the low-pressure valve, then attach the refrigerant to the valve and charge from there. Ensure you use the right refrigerant type and amount, as specified by a manufacturer. It is possible to overcharge the AC, so consider seeking help from a mechanic.
Tip For T590 Model
When an engine is running in an enclosed area, fresh
air must be added to avoid concentration of exhaust
fumes. If the engine is stationary, vent the exhaust
outside. Exhaust fumes contain odorless, invisible
gases which can kill without warning.
Do not engage the starter for longer than 15 seconds
at a time. Longer use can damage the starter by
overheating. Allow starter to cool for one minute
before using starter again.