BMW DTC P1811 – Input/Turbine Shaft Speed Sensor Circuit Low
DTC P1811 meaning on BMW
DTC P1811 on a BMW indicates an issue with the Input/Turbine Shaft Speed Sensor Circuit being detected as low. This sensor is responsible for monitoring the speed of the input and turbine shafts in the transmission. When the signal from this sensor is lower than expected, the P1811 trouble code is triggered.
BMW DTC P1811 symptoms
Symptoms of DTC P1811 on a BMW may include:
- Harsh shifting
- Delayed shifting
- Transmission slipping
- Decreased fuel efficiency
- Illuminated Check Engine Light
BMW DTC P1811 causes
The common causes of DTC P1811 on a BMW include:
- Defective Input/Turbine Shaft Speed Sensor
- Wiring or connector issues in the sensor circuit
- Faulty transmission control module
- Low transmission fluid level or dirty fluid
BMW DTC P1811 seriousness
Ignoring DTC P1811 on a BMW can lead to further transmission problems and potential damage. It is important to address this issue promptly to prevent more severe issues and ensure the proper functioning of the transmission system.
How to diagnose DTC P1811 on BMW
To diagnose DTC P1811 on a BMW, you can follow these steps:
- Use a diagnostic scanner to retrieve the trouble codes.
- Inspect the Input/Turbine Shaft Speed Sensor and its wiring for any visible damage.
- Check the transmission fluid level and condition.
- Perform a road test to observe the symptoms associated with the code.
How to fix DTC P1811 on BMW
To fix DTC P1811 on a BMW, you can try the following solutions:
- Replace the Input/Turbine Shaft Speed Sensor if faulty.
- Repair any damaged wiring or connectors in the sensor circuit.
- Ensure the transmission control module is functioning correctly.
- Perform a transmission fluid flush and refill if needed.
How to erase DTC P1811 on BMW
To erase DTC P1811 on a BMW, you can use a diagnostic scanner to clear the trouble codes stored in the vehicle’s system. After addressing the underlying issue causing the code, clearing the code will reset the Check Engine Light and monitor the system for any new faults.
Recommended tools & DTC Scanners for BMW
Best Diagnostic App for modern BMWs: BimmerLink
Recommended Bluetooth adapter for Bimmerlink: OBDLink CX
Cable adapter for Bimmerlink: Enet Cable USB Type C
For older BMWs we recommend: Autel AutoLink AL319 (2024 version)
Easy-to-use Multimeter for reliable diagnostics: AstroAI Auto-ranging Multimeter
Some of the links on this page may be affiliate links, which means we may earn a small commission if you make a purchase. This helps us keep our DTC database up to date and provide valuable content for free. We only recommend products that we have tested and believe to be the best in their class.