What does P1811 mean?

A P1811 diagnostic trouble code means the hydraulic line pressure has been raised to compensate for excessively worn clutches or other components. If left unchecked, this excessive line pressure can cause serious damage to other control components, making a small problem a lot worse.

Where is the shift solenoid on a 2003 Buick Lesabre?

all solenoids are located behind the side cover.

How do I fix code p1811?

A popular quick remedy you can use before driving into extensive labor and expensive repair is to install a shift improver kit. These kits come with new set of accumulator spring and spacers to limit the travel of accumulator piston, which would speed up the time it takes to apply the clutch.

How do I fix code P0742?

What Repairs Will Fix P0742?

1. Replace the torque converter clutch solenoid.
2. Replace the torque converter or clutch.
3. Change transmission fluid and filter.
4. Repair/replace damaged wiring and connectors.
5. Repair/replace TCM or ECU.
6. Install a rebuilt or remanufactured transmission.

What is the p1811 code for GM front wheel drive?

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.

What does the error code p1811 stand for?

This error code is a manufacturer-specific trouble code, meaning it does not apply to all vehicles makes. Rather, it applies only to specific vehicle makes, such as Buick, Chevrolet, GM, Pontiac, etc. Specification of the definition, troubleshooting, and repairs still vary from one make and model to another.

What happens when p1811 is set on peoples transmission?

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.

What does PCM look for when setting p1811?

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.