Q: P1811 code. Is this a major code?

asked by on October 05, 2016

Mechanic pulled up a P1811 code. The car drives smooth. Transmission doesn't slip or stick. What does it mean?

Hi, thanks for writing in. This code occurs when the PCM sees that the transmission takes longer to shift than the given parameters. The PCM uses several parameters, like load and speed, to tell the transmission when it should shift. When a vehicle is overloaded, pulling a trailer, or towing a trailer in overdrive, it can cause the code to set. It would be recommended to clear the code and see if it sets again. If it does, it may be a sign of more serious problems within the transmission, or transmission control systems.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

What others are asking

Car makes scraping sound and rattles

Hi there, thanks for writing in about your 2001 BMW 740iL. It sounds like you have more than one problem here, and the scraping noise can be something dragging or rubbing and can only be checked and diagnosed in person....

Grinding noise in park truck wont move

From what is provided it definitely appears that your Dodge Ram has suffered damage in the transfer case. From my experiences working with transfer cases, most transfer case problems can be resolved with a rebuild. There is a known weakness...

Can Over torqued tie rods damaged rack

Hi there. This is a tricky question to answer. Is it possible - certainly. Can it be proved - unfortunately not. Anytime suspension or steering work is completed, it is recommended to torque all bolts and nuts to the correct...

How do you avoid the upper and lower A arm bushings from melting on a 1970 GS 455?

Hi there - yes, this is a very large engine, in a moderately-sized place, with lots of heat transfer issues! As you suggest, heat shields, or wrapping the exhaust manifold (headers?) with "heat wrap" to keep the heat inside the...

Need to cycle fuel pump on and off two or three times before starting. Fuel pump or pressure regulator?

Hi Peter. Thanks for contacting us tonight. What you are describing is common with a faulty fuel pump relay or pressure regulator - as opposed to the fuel pump itself. If you're able to 'cycle the pump' that typically indicates...

Idle air valve calibration/adjustment

Hi there. It is suggested to have a bidirectional scan tool but it is not required. Verify the idle speed is within 650-750 rpm. You want to be at 700 rpm ideally. Connect data link connector terminals TEN & GND...

How much labor costs is it to replace spark plugs and wires on a 2001 buick lesabre?

The cost depends on whether you have the V6 or V8 engine. The V8 requires significantly more time for the plugs and wires due to the amount of disassembly required to get to the wires, particularly on the right bank...

Van jerks, engine loses power, no acceleration - 2008 Hyundai Entourage

Hey there. A good start would be to have the car scanned to see what code has set in the computer and turn the Check Engine Light on. Your problem could be many things, from a problem with the drive-by-wire...

hvac blower not working and 30A fuse blown

That 30A fuse powers what is historically known as a blower motor resistor. In the case of your car it is a small computer called the blower motor control processor. It is simply a blower fan speed control. I would...

Related articles

A Buyer's Guide to the 2012 Buick Regal eAssist
Although Although a lot changed about the Buick Regal in 2012, the addition of a hybrid model was definitely the biggest head turner. Whether you want to do your part for the environment or simply save at the pump, this...
The Best Used Cars to Buy for Towing Light Loads
Towing Towing is tricky business and depending on the weight you’re dealing with, it really determines what vehicle is best for you. If it’s light loads you’re looking at towing, we’ve put together a list of the top five cars...
How to Get Buick Dealership Certified
GM/Buick car dealerships offer automotive technician jobs to mechanics who are certified through the Universal Technical Institute (UTI) and GM.