229.101—Engines.
        
        (a) 
         The temperature and pressure alarms, controls and related switches of internal combustion engines shall function properly.
    
    
        
        (b) 
         Whenever an engine has been shut down due to mechanical or other problems, a distinctive warning notice giving reason for the shut-down shall be conspicuously attached near the engine starting control until repairs have been made.
    
    
        
        (c) 
         Wheel slip/slide protection shall be provided on a locomotive with an engine displaying a warning notice whenever required by  § 229.115(b).