Skip the auto shop - Our mechanics make house calls

Q: P1811 code. Is this a major code?

asked by on

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.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
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

Get a quote

What others are asking

Q: Car doesn't start after head gasket replacement

Hi there. If the engine will not crank then the starter circuit needs to be tested to see if there is a wiring issue. If it is cranking and not starting then the computer needs to be checked with a...

Q: Kia Sedona has grinding sound when brake and release; signs of brake pad deteriorated

Always replace the front both or rear both at the same time. If the problem is just the pads, then you may need rotors also. I would do a complete inspection of all the brakes, and replace all of...

Q: Brakes jerking - 2015 Buick Encore Automatic

You may consider having the brake pads changed with some non-Buick pads (i.e. aftermarket). Based on the number of complaints on this issue, General Motors seems to have a mismatch on brake pad material with this model. This will, unfortunately,...

Related articles

How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.