I would like to verify with the gang here its a simple transducer on the high side pipe that needs replacing for 2006 Dodge 2500 Cummins. No compressor and there is 100 psi of Freon in the system. But I'm getting P0533 code of A/C transducer hi volt.

2 wire or three, pressure or temp?

3 wire pressure transducer.

3 wire usually means it has a signal wire then "5V generally" and Hi voltage equals an open wire or bad transducer not varying the return current signal, the ecm is seeing a full 5 volt return which it shouldn't if the transducer or wire were good there would be a slight voltage drop. If it was low voltage it would be a shorted wire to ground not returning any signal as it would be flowing to ground.

I've got 5V at the sensor plug and the P0533 code is return on the next key cycle. We've got a new sensor on order (not cheap) and it requires a pigtail because the new sensor is round plug vs. the original which is square 2x2 setup with only 3 pins used. I just figure I would pop this out hoping anyone has dealt with this or seen it before.

Well the owner came back to have this issue dealt with. Changed the A/C Transducer and the plug. (Not cheap either). But the code remains. 5 Volt at the plug. Ground appears good, But still having issues. So the owner has been referred to another shop with a bit more high tech scanners and computer tools. The funny part is this other shop happen to have another Dodge in the same year with the same problem and required to have the PCM reflashed. (Internal software issue?)

Probably a tipm problem

Probably a tipm problem

 

TIPM???

 

Ok.. Never mind got the answer... Thank gawd for acronym function.