Truck went into limp mode

Hi,

Could you let me know the codes that were found? If you replaced a shift solenoid, let me know which one it was. Also, let me know if there were any codes related to a pressure sensor or line pressure.

Take care,

Joe

P0141 , p0420 , p0430 , p0785 . And I believe the first one is for my catalytic converter.

I'll have to look up what the codes are.

Hi,

I can do that for you.

P0141 has to do with the bank 1 sensor 2 heated oxygen sensor

P0420 has to do with the catalytic converter (operating below threshold bank 1)

P0430 has to do with the catalytic converter (operating below threshold bank 2)

P0785 is the one that deals with the 3-2 downshift solenoid.

Here is what I need you to do: Clear the codes and see what codes return. If the P0785 returns, we will be looking for an electrical problem related to the issue between the VCM and the solenoid. Either we have a short to power or an open circuit. Voltage is too high or too low.

Let me know if you already did this and it returned. If you haven't, let's give it a try.

Take care and let me know.

Joe

The code came back , but I remembered that my anti lock brake came on and stays on. been doing that since bout 2 weeks ago.

Or the light has been on.

And I changed u joints the the day this happened or the day before . Is it possible I got something in the transmission when stabbing the drives haft back into the transmission output shift?

Hi,

I don't feel it has anything to do with the driveshaft. Is the speedometer working properly? As far as the ABS light, that could be the result of being in limp mode.

Let me know.

Joe

Found it , the 3 2 downshift solenoid was melted.

Hi,

Glad to hear you found it. If it was melted, that is where the voltage issue was coming from. Have you already replaced it and are things working properly now?
Joe