I have a diagnostic code for my 2000 Saturn SL 2 that is P1811. I know it is transmission related, but what is this code telling me? The car has the v-6 engine in it. Thanks.

P1811 - Maximum Adapt and Long Shift Mode Chevy, Pontiac, Saturn, and Buick Front Wheel Drive Vehicles The P1811 code is one of the most common codes for transmissions in 1997-on GM front wheel drive vehicles. Symptoms of this code include a check engine light illuminated and harsh shifting. Cycling the key on and off may cure the harsh shifting until the criteria for the code is met once more. We are going to cover what causes the code to set and repair options.

Code Criteria
If a shift into any gear other than reverse and forward engagements takes longer than 0.65 seconds to complete, code P1811 will set. The Powertrain Control Module will then command maximum line pressure inside of the transmission, resulting in harsh shifting. The PCM will also command the check engine light or service engine soon light to be illuminated when P1811 is set. Basically, the PCM is sensing a slip, and is increasing line pressure to maximum in order to prevent the transmission from hurting itself further.
Repair Options
In 2002, GM release a technical bulletin for the P1811 code. See the bulletin by clicking this link http://bit.ly/P1811_Bulletin. The bulletin states that a mechanical problem in the Pressure Control (PC) solenoid, contamination in the valve body, or incorrect fluid level can cause the P1811 to set. Those problems could definitely cause a P1811, but what they failed to mention in the bulletin is, what exactly is the PCM looking for when setting P1811. It's looking for a slip of 0.65 seconds or longer to set the code. See http://bit.ly/P1811_Diag_Tree. So it's not as cut and dry as the bulletin makes it to be. A burnt clutch pack, stripped overdrive clutch hub, worn accumulators, worn valving especially the actuator feed limit valve, and just high mileage can all cause this code to rear its ugly head. All of which would require transmission disassembly to repair. Now I'm not saying that P1811 is going to require a major transmission overhaul every time a vehicle comes into the shop with the code. I'm saying that it is not always going to be as simple as just changing out a solenoid.
How to Know if a Solenoid will Repair the Problem
It is impossible to know for sure what the internal shape of a transmission is while the transmission is still in the car. The first thing to check is the transmission fluid. If the fluid level is low, add automatic transmission fluid (ATF) until full. Remember that transmission fluid needs to be checked while the engine is warm and running with the shifter in the Park position. After the fluid level is OK, drive the vehicle to your nearest People's Transmission certified shop to have it checked. If the fluid level was low, there is a leak somewhere that has to be repaired. The shop will then test drive the vehicle while monitoring data on a scanner that is communication with your vehicle's PCM. After that, the shop will most likely recommend a pan drop to see if any contamination is being produced inside of the transmission. If contamination in the form of clutch material or metal is present, then a solenoid replacement will be a waste of money. If the pan is clean, fluid is in decent shape, and the mileage is below 80,000 miles or so, then maybe a solenoid will fix the problem. The thing to remember is, if the shop recommends a solenoid, then they are looking out for your best interests. It still may not fix the problem, but from what they have seen during their checkout, a solenoid replacement is worth the gamble. If the shop recommends a transmission overhaul, ask them what they found that makes them think that is the only option.
Maybe this will help, good luck.OKI1IT

if you have a scaner see if there is any transmisson codes it may be a computer

Simple tell you there is a valve inside the transmission, the ends of the valve are respectively throttle control oil pressure, oil pressure and speed when you step on the gas inside the valve throttle pressure increases the transmission oil, pushing through change down to one side after a series of relations between the transmission will be blocked, as the speed of high-speed hydraulic control are on the rise, until after the oil pressure is higher than the throttle inside the valve to the other side through the transmission shift up oil, after a series of relations between the transmission block
want know more this web

if the transmission mixing with the water or anti freeze .that mean your radiator is bad and needs to be replaced

is there any codes. there is a transmission module

CODE PO218 - TRANSMISSION FLUID OVER TEMPERATURE.TRANSMISSION FLUID IS LOW OR CONTAMINATED BURNT OR DIRTY.CHECK TRANSMISSION COOLER LINES FOR DAMAGE OR RESTRICTION. CODE PO742 - TORQUE CONVERTER CLUTCH CIRCUIT STUCK ON. CODE P1811 - MAXIMUM ADAPTIVE LONG TERM SHIFT. CODE U1301 - CLASS 2 CIRCUIT SHORT TO BATTERY.POSSIBLE CAUSE CLASS 2 SERIAL DATA LINE WAS IN A HIGH STATE FOR 3 SECONDS DUE TO A SHORT TO VREF OR SYSTEM POWER. ONE OR MORE MODULES ON CLASS 2 LINE HAS AN SHORT TO POWER.LOOKING AT ONE OF THE CODES.TRANSMISSION GETTING TOO HOT.DUE TO OVERHEATING ENGINE OR YOU ARE TOWING OR PULLING MORE WEIGHT THAN YOUR VECHICLE CAN HANDLE.CAUSING ENGINE AND TRANSMISSION TO OVERHEAT.

1.) To begin, if your radio is displays LOC, then proceed to step 2. If your radio says INOP, then turn your ignition to the RUN position, and turn the radio ON. You must leave it like this for a minimum of 1 hour (not 59 minutes) to clear the INOP message. I would wait 1 1/2 hours just in case doing it too early causes the timer to start over.

2.) Turn your ignition to RUN (if not already), and your radio to OFF. Press and hold preset buttons 2 and 3 for around 5-10 seconds to obtain a scrambled version of your radio's original factory set code.

3.) Call a GM dealer with this code. Tell them you are with a local shop i.e. I am Joe with Good Year Highway Tire; Then tell them: We have a 2000 Saturn SL we just changed a battery in and the radio is now locked. My mechanic pulled the pre-code. Could you give me the code? This usally works at no charge.

Once you have the code write it down. Keep atleast 2 copies. Hope this helps!

THE CAT CONVERTOR HAS FAILED DUE TO A NUMBER OF ISSUES, OR THE SENSORS ARE READING WRONG CAN ONLY ANSWER WHEN HOOKED TO A DIAGNOSTIC READER TO TEST OUTPUTS FROM ALL RELATED COMPONANTS, IF U CHECK FOR FAULTS BEFORE YOU REPLACE CAT IT WILL SAVE YOU THE NEW CAT,

get the catlist converter chk

My manual shows----- code 22 is throttle position sensor, and code 83 is low engine coolant.