4L80E Code 22 and 73

[4x4Junkie13]

Trying to get this thing to shift properly, stuck in limp mode.
Codes are:

1. 22 TPS sensor circuit low
2. 73 PCS circuit

• Should I waste time testing the TPS and the PCS or just replace them?
• When replacing the TPS, does the new one have to be adjusted for it to work properly?

 

[4x4Junkie13]

Anyone?

 

[Mogman]

Yes you should troubleshoot the TPS, there have been wiring/connector issues before.
Not likely any relationship between the two error codes, just follow the steps in the guide.
I guess I would do the TPS first, when you start to work the #73 check that the control plug at the transmission is not full of fluid first.
Just in case you do not have it.

 

[4x4Junkie13]

Yes you should troubleshoot the TPS, there have been wiring/connector issues before.
Not likely any relationship between the two error codes, just follow the steps in the guide.
I guess I would do the TPS first, when you start to work the #73 check that the control plug at the transmission is not full of fluid first.
Just in case you do not have it.

Thanks again neighbor. I figured this was the way, just wanted to be sure before I started diving into the checklist.

For code 73, if the connector is dry and tight, is it easy to drop the solenoid and replace?

 

[Mogman]

Thanks again neighbor. I figured this was the way, just wanted to be sure before I started diving into the checklist.

For code 73, if the connector is dry and tight, is it easy to drop the solenoid and replace?

I have no idea but likely fairly easy, but of course you want to troubleshoot it, not just start swapping parts.
Allot of you-tube videos about the 4L80E most of the civy stuff relates to your transmission.

 

[Valley Rock]

While not an expert, if I walked out and discovered my trans wasn't talking to it's two main contributors (tps and pcs) I would check for grounding issues first, I find a simple and effective way to do that is to hook a test light to the + side of battery and get to probin' them grounds and go from there .

 

[Mogman]

None of the signals depend on ground, all the leads involved go directly to the TCM.
It could be a lead problem or a device problem or a TCM issue but because he is getting codes it would be assumed the TCM is seeing ground.