Error code P1911 is displayed and the check engine light is on - what does this mean?
The DTC P1911 is recognized by the OBD system when a problem is detected with the transmission control unit or the torque converter clutch system. This manufacturer-specific error code mainly affects the automatic transmission and its electronic control unit. This trouble code can have slightly different meanings for different vehicle manufacturers, but generally refers to problems in the transmission area.
What causes can this error code have?
- Defective transmission control unit (TCM)
- Damaged cable connections to the transmission
- Faulty torque converter clutch
- Defective transmission sensors
- Worn solenoid valves in the transmission
- Insufficient or contaminated transmission oil level
- Loose or corroded plug connections
- Defective transmission oil pump
- Mechanical damage to the transmission
What symptoms occur in parallel with error code P1911?
- Shifting problems: The automatic transmission shifts jerkily or with a delay
- Emergency running program: The transmission switches to safety mode
- Loss of power: Noticeable reduction in engine power
- Unusual noises: Rattling or grinding from the transmission area
- Increased fuel consumption: Significantly higher consumption than normal
- Starting problems: Vehicle is difficult to start
- Engine stuttering: Unsteady engine running at different engine speeds
How can the problem with error code P1911 be rectified?
- The repair requires a systematic approach to identify and rectify the root cause.
- Check the transmission oil level and quality, change or top up if necessary, as contaminated or insufficient oil is often the cause
- Check all electrical connections to the transmission for corrosion and tight fit, repair or replace damaged cables
- Read out the transmission control unit (TCM) with a professional diagnostic device and have it replaced if defective
- Test torque converter clutch for proper function and replace completely if worn
- Clean the solenoid valves in the transmission or replace with new parts if irreparably damaged
- Check transmission sensors individually and replace defective sensors with original spare parts
- In the event of mechanical transmission damage, consider a complete transmission overhaul or a replacement transmission
FAQ - Frequently asked questions about DTC P1911
Can I continue driving with error code P1911?
It is not recommended to continue driving with this code, as severe transmission damage can occur. The vehicle should be taken to a workshop immediately to avoid major repair costs.
How much does it cost to repair error code P1911?
The repair costs vary greatly depending on the cause: transmission oil change costs 150-300€, sensors 200-500€, control unit 800-1500€, while a complete transmission repair can cost 2000-5000€.
Is the error code P1911 the same for all vehicles?
No, P1911 is a manufacturer-specific code that can have different meanings for different brands. A precise diagnosis with brand-specific diagnostic equipment is therefore essential.
Can I repair fault code P1911 myself?
Simple measures such as changing the oil or checking the plug connections are possible, but most P1911 repairs require specialist knowledge and special tools. Transmission repairs should be left to professionals.
How long does it take to diagnose fault code P1911?
A basic diagnosis takes 1-2 hours, while a full transmission investigation can take 4-8 hours for more complex problems.
What consequential damage can fault code P1911 cause?
If left untreated, this fault code can lead to complete transmission failure, engine damage due to overloading or damage to the drive shaft, resulting in significantly more expensive repairs.