ERR 173 Code

[19 Hundo]

Blew a belt today and shortly after check engine light came on and it's now throwing code 173 which is Exhaust Senaor Voltage too high. New probe is 150 bucks hoping some could give me basic instructions to back probe and check the resistance to determine if it's a broken wire or actually the probe?

Thank you

 

[LoudHandle]

As the Voltage Regulator is on the Belt guard. That would be my first thing to rule out.

I'm not an electrical guru by any means, but I don't see the pipe temp sensor making electricity. Most thermo-couples just create a resistance depending on temperature that the ECU measures.

 

[Murph]

EGT sensor resistance values

2.3 M(ohms) @392 F (200 C)
76 ohms @ 1652 F (900 C)

 

[drek08]

Did you figure out the issue? I blew a belt and now im having the same problem.

 

[19 Hundo]

I took it to the Dealer they put the digital wrench on it showed over voltage, I took it home caws pulling the egg probe and looked down and noticed I was missing springs from the Y-pipe to the pipe, i replaced the springs, put the probe back in and no problems since. So really no idea other than the broken springs allowing air to be sucked in the pipe messing with the resistance in the probe?

 

[BILTIT]

As the Voltage Regulator is on the Belt guard. That would be my first thing to rule out.

I'm not an electrical guru by any means, but I don't see the pipe temp sensor making electricity. Most thermo-couples just create a resistance depending on temperature that the ECU measures.

Actually a thermocouple does produce electricity in the form of millivolts. Its the RTD and thermister that are only resistance changes.

For a thermocouple, the millivolts measured/produced directly correlates to the temperature for that specific type (many different types of thermocouples).

See the chart below for a type K (most common for exhaust temp uses).

http://www.pyromation.com/Downloads/Data/emfk_c.pdf


I honestly don't know if they are using a Thermocouple or RTD for this application, never really looked into it.