Code P1776
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Code P1776
I have a 2004 Dak, 4 x4, automatic tranny; code showing is about the solenoid switch valve being stuck in rear position. I just started college and my funds are pretty nil right now. I cleared the code. What would happen if I just ignore the code?
Legend
Joined: Feb 2005
Posts: 8,058
Likes: 184
From: Fort Worth, TX
Specific to the (5)45RFE transmission:
Cause: This can be several issues, one simply being the switch is stuck, meaning you need to replace the solenoid assembly.(most common especially early model years 2000-2004) can be the switch valve in the valve body is stuck in the low reverse position, or the range sensor is malfunctioning, check shifter cable adjustment as manual valve out of alignment can create this code as well. Lastly it can be a shorted wire from transmission to ECM, will have codes P1784 and or P0841 for wiring.
Cause: This can be several issues, one simply being the switch is stuck, meaning you need to replace the solenoid assembly.(most common especially early model years 2000-2004) can be the switch valve in the valve body is stuck in the low reverse position, or the range sensor is malfunctioning, check shifter cable adjustment as manual valve out of alignment can create this code as well. Lastly it can be a shorted wire from transmission to ECM, will have codes P1784 and or P0841 for wiring.
Legend
Joined: Feb 2005
Posts: 8,058
Likes: 184
From: Fort Worth, TX
not sure as I'm not overly knowledgable on the newer electronic transmissions.
From what I see, it's caused from transmission fluid not being changed or foreign material or clutch material getting stuck in the valvebody and allowing the solenoid piston to not move. This can usually preclude a failing transmission, particularly if it is clutch material. The solenoid is roughly $100 based on source and is replaceable with the pan off, as during a routine fluid/filter change.
The Solenoid switch valve directs the Low/Reverse and TCC solenoid oil to work the torque
converter clutch valves, when the transmission is not in first or reverse gears. (Figure 1 and 2) If the
computer sees the Low/Reverse pressure switch closed during any period when TCC is commanded,
P1776 will set.
In most cases, the fix for this code is to address the common wear that develops in the Solenoid
switch valve by reaming and replacing the valve with an aftermarket design or replacing the valve
body with new or rebuilt.
In other cases, the code can be caused by:
1. Shift Cable, Causing a “T” transition input to the TCM adjustment
2. An intermittent short to ground on Low/Reverse pressure switch circuit.
3. Defective solenoid pack
4. PCM programming
Basically what that means is that the solenoid is stuck in the L/R position, which is disallowing the TCC function. This will build transmission heat, particularly in overdrive. However, detecting that TCC is nonfunctioning, OD may be deactivated by the PCM.
From what I see, it's caused from transmission fluid not being changed or foreign material or clutch material getting stuck in the valvebody and allowing the solenoid piston to not move. This can usually preclude a failing transmission, particularly if it is clutch material. The solenoid is roughly $100 based on source and is replaceable with the pan off, as during a routine fluid/filter change.
The Solenoid switch valve directs the Low/Reverse and TCC solenoid oil to work the torque
converter clutch valves, when the transmission is not in first or reverse gears. (Figure 1 and 2) If the
computer sees the Low/Reverse pressure switch closed during any period when TCC is commanded,
P1776 will set.
In most cases, the fix for this code is to address the common wear that develops in the Solenoid
switch valve by reaming and replacing the valve with an aftermarket design or replacing the valve
body with new or rebuilt.
In other cases, the code can be caused by:
1. Shift Cable, Causing a “T” transition input to the TCM adjustment
2. An intermittent short to ground on Low/Reverse pressure switch circuit.
3. Defective solenoid pack
4. PCM programming
Basically what that means is that the solenoid is stuck in the L/R position, which is disallowing the TCC function. This will build transmission heat, particularly in overdrive. However, detecting that TCC is nonfunctioning, OD may be deactivated by the PCM.
