Whats this CODE
rockford0384
03-20-2004, 02:59 AM
Alright I was doing some research to see if 4T65E trans has after market servos, well anyways i came accross a web site for techs or someone, I couldnt get in to read it but i did manage to get this Code. This is what it said >>>The cause for, and diagnosis of Code 1811<<< This must be a common problem or something. If anyone knows help me out im wondering about what it means
thanks
thanks
paul1965
03-20-2004, 01:18 PM
Looks like you've got an internal problem. Here's what Alldata says....
The transmission pressure is modified by an adaptive modifier which controls the shift execution time. This test checks the time required to accomplish the shift. If the shift takes longer than 0.65 seconds, and the adaptive modifier cannot shorten this time, then a counter increases by one.
If the PCM detects the counter reaching two, then DTC P1811 sets. DTC P1811 is a type D DTC.
Conditions for Setting the DTC
One of the following fail cases is true two times.
Case 1
The 1-2 shift is longer than 0.65 seconds.
The 1-2 shift adapt has reached maximum pressure.
Case 2
The 2-3 shift is longer than 0.65 seconds.
The 2-3 shift adapt has reached maximum pressure.
Case 3
The 3-4 shift is longer than 0.65 seconds.
The 3-4 shift adapt has reached maximum pressure.
Action Taken When the DTC Sets
The PCM commands maximum line pressure.
The PCM disables shift adapts.
The PCM does not illuminate the Malfunction Indicator Lamp (MIL).
Conditions for Clearing the DTC
A scan tool can clear the DTC from the PCM history. The PCM clears the DTC from the PCM history if the vehicle completes 40 warm.up cycles without a failure reported.
The PCM cancels the DTC default actions when the fault no longer exists and the ignition is OFF long enough in order to power down the PCM.
Diagnostic Aids
Inspect for possible vehicle overloading, exceeding trailer towing limit, or towing in overdrive.
If you performed a transmission overhaul, use the scan tool to clear all adapts.
Test Description
The numbers below refer to the step numbers on the diagnostic table.
This step inspects components located within the valve body, if the fluid pressure gauge readings do not match the commanded PC Sol. Valve current to line pressure located in the value column.
This step inspects or repairs any of the components listed. A faulty component may lead to a maximum adapt and long shift during a 1-2 upshift.
This step inspects or repairs any of the components listed. A faulty component may lead to a maximum adapt and long shift during a 2-3 upshift.
This step inspects or repairs any of the components listed. A faulty component may lead to a maximum adapt and long shift during a 3-4 upshift.
Sorry, but I'm not able to paste the actual flow chart for the diagnostics.
The transmission pressure is modified by an adaptive modifier which controls the shift execution time. This test checks the time required to accomplish the shift. If the shift takes longer than 0.65 seconds, and the adaptive modifier cannot shorten this time, then a counter increases by one.
If the PCM detects the counter reaching two, then DTC P1811 sets. DTC P1811 is a type D DTC.
Conditions for Setting the DTC
One of the following fail cases is true two times.
Case 1
The 1-2 shift is longer than 0.65 seconds.
The 1-2 shift adapt has reached maximum pressure.
Case 2
The 2-3 shift is longer than 0.65 seconds.
The 2-3 shift adapt has reached maximum pressure.
Case 3
The 3-4 shift is longer than 0.65 seconds.
The 3-4 shift adapt has reached maximum pressure.
Action Taken When the DTC Sets
The PCM commands maximum line pressure.
The PCM disables shift adapts.
The PCM does not illuminate the Malfunction Indicator Lamp (MIL).
Conditions for Clearing the DTC
A scan tool can clear the DTC from the PCM history. The PCM clears the DTC from the PCM history if the vehicle completes 40 warm.up cycles without a failure reported.
The PCM cancels the DTC default actions when the fault no longer exists and the ignition is OFF long enough in order to power down the PCM.
Diagnostic Aids
Inspect for possible vehicle overloading, exceeding trailer towing limit, or towing in overdrive.
If you performed a transmission overhaul, use the scan tool to clear all adapts.
Test Description
The numbers below refer to the step numbers on the diagnostic table.
This step inspects components located within the valve body, if the fluid pressure gauge readings do not match the commanded PC Sol. Valve current to line pressure located in the value column.
This step inspects or repairs any of the components listed. A faulty component may lead to a maximum adapt and long shift during a 1-2 upshift.
This step inspects or repairs any of the components listed. A faulty component may lead to a maximum adapt and long shift during a 2-3 upshift.
This step inspects or repairs any of the components listed. A faulty component may lead to a maximum adapt and long shift during a 3-4 upshift.
Sorry, but I'm not able to paste the actual flow chart for the diagnostics.
hobieracer
06-11-2004, 10:57 PM
Which components? I have this problem, but can't find any codes yet in the history. What could be wrong. Can i hope it might be a pcs? (141k regal)
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