Bobcat error codes 5-21 & 4-21

[cjlennon623]

Hey Folks, As always, thank you for taking the time to read my plea for help. I have a 2001 Bobcat 753 (G series) that is giving me two error codes: 05-21 and 04-21. I have changed both the oil and hydraulic sensors which I believe control these two codes and no luck. I have also swapped out the Icon panel in the upper right corner of the cab but no luck. Still have the codes and the lights. Any one out there have any ideas? I'm stuck and so is my Bobcat. As always, thanks to everyone! Chris Lennon

 

[OldMachinist]

That is a strange one having the 4-21 engine oil pressure out of range high and 5-21 hydraulic charge pressure out of range high. Normally when getting strange codes I'd start looking for a bad ground wire but it seems like you should be having other problems too if it was a bad ground.

 

[cjlennon623]

That is a strange one having the 4-21 engine oil pressure out of range high and 5-21 hydraulic charge pressure out of range high. Normally when getting strange codes I'd start looking for a bad ground wire but it seems like you should be having other problems too if it was a bad ground.

OldMachinist, Appreciate the insight. I agree. It seems like I have 2 problems that came from no where and they basically have nothing to do with each other. We checked ground wires and connectors and can't seem to find anything wrong. My next thought is that the voltage that feeds the sensors may be out of range (maybe low?) and may cause this problem. So, I pulled the computer, opened it up and didn't find any physical problem with the circuit board. So, I am still baffled. Hoping some one has a magic wand. Again, thanks for the suggestion! Chris

 

[rnbuck01]

OldMachinist, Appreciate the insight. I agree. It seems like I have 2 problems that came from no where and they basically have nothing to do with each other. We checked ground wires and connectors and can't seem to find anything wrong. My next thought is that the voltage that feeds the sensors may be out of range (maybe low?) and may cause this problem. So, I pulled the computer, opened it up and didn't find any physical problem with the circuit board. So, I am still baffled. Hoping some one has a magic wand. Again, thanks for the suggestion! Chris

Check your grounds and supply voltage. Check continuity of the wires too.