PA Highlander
08-25-2010, 08:19 AM
So the KJ set some codes over the weekend in PA and went into limp mode until it was shut down and restarted. I checked the codes with my basic scan tool when we got back and found codes P0700 and P1776 were set. Some web searching finds that this references the L/R solenoid pack in the transmission (most detailed explaination below). What shops local to Warrenton would be good to check this out without soaking me too badly?
(now I really need to sell the K2500 so I can fix the KJ! :tinysmile_cry_t2: )
There are a few things that could cause the P1776 code. (the P0700 is just informational, it tells you there are codes stored in the trans controller) The best thing to do would be to use an actual scan tool to access the event data saved and see the shift position state the range sensor was showing while the code set. It's possible that a misadjusted shift cable could set this code. This isn't as common, but possible. If your shifter operation feels normal you probably have a solenoid switch valve in the valve body that is hanging up. This valve allows the same solenoid in the solenoid pack to control both the low/reverse clutch and the torque converter clutch. This valve has to move when it shifts out of first, and before it downshifts back into first again. It can end up wearing into it's bore in the valve body. This will allow the valve to cock when fluid pressure is applied to one side of it and it can't move to it's full travel, and the P1776 sets. A new valve body is required to fix this issue.
(now I really need to sell the K2500 so I can fix the KJ! :tinysmile_cry_t2: )
There are a few things that could cause the P1776 code. (the P0700 is just informational, it tells you there are codes stored in the trans controller) The best thing to do would be to use an actual scan tool to access the event data saved and see the shift position state the range sensor was showing while the code set. It's possible that a misadjusted shift cable could set this code. This isn't as common, but possible. If your shifter operation feels normal you probably have a solenoid switch valve in the valve body that is hanging up. This valve allows the same solenoid in the solenoid pack to control both the low/reverse clutch and the torque converter clutch. This valve has to move when it shifts out of first, and before it downshifts back into first again. It can end up wearing into it's bore in the valve body. This will allow the valve to cock when fluid pressure is applied to one side of it and it can't move to it's full travel, and the P1776 sets. A new valve body is required to fix this issue.