This page contains links to third parties, if you click through those links we may receive a commission at no extra cost to you.

Engine Fault Code P2766

Input/Turbine Speed Sensor B Circuit Range/Performance

Care Engine Code Reader
The Engine Fault Code P2766 refers to an issue with the Input or Turbine Speed Sensor B Circuit. This sensor measures the speed of the turbine in the transmission, and it helps the vehicle`s computer manage shifting and performance. When the code appears, it usually means that the sensor is not working properly or the signal it sends is out of range.

Here are some details about what this code might mean:

1. Faulty Sensor: The Input/Turbine Speed Sensor B itself might be damaged or malfunctioning. This is the most common cause of the code.

2. Wiring Issues: There could be a problem with the wiring or connectors related to the sensor. Look for frayed wires or loose connections.

3. Transmission Problems: Sometimes, this code can indicate broader issues within the transmission itself, such as low fluid levels or internal damage.

4. Control Module Issues: The vehicle`s transmission control module (TCM) may be malfunctioning or not interpreting the signals correctly.

Alternative Meanings by Manufacturer
While P2766 generally has the same meaning across many manufacturers, there can be slight variations in how its interpreted in different vehicles:

Porsche: Similar to general interpretation, but may also indicate specific transmission issues related to their unique dual-clutch systems.

Mini: Often associated with transmission performance problems, especially in models with automatic transmissions.

Mercedes-Benz: Can sometimes point to a need for software updates in the TCM, in addition to hardware issues.

Audi: Similar to the general interpretation, but may also involve the Quattro system in all-wheel-drive models.

Jaguar: May indicate a need for recalibration of the transmission control system, especially in newer models.

Land Rover: Often linked to issues with the Terrain Response system if the vehicle is equipped with advanced transmission settings.

If you see this code, it`s best to have the vehicle diagnosed by a professional mechanic who can check the sensor, wiring, and transmission system to identify the exact cause.
The Engine Fault Code P2766 refers to a problem with the Input/Turbine Speed Sensor B Circuit. This code indicates that the sensor`s performance is out of range, which can affect the transmission`s operation. Here are some common causes for this code, along with manufacturer-specific differences:

Common Causes:
1. Faulty Input/Turbine Speed Sensor: The sensor itself may be damaged or malfunctioning.
2. Wiring Issues: Damaged or corroded wiring or connectors can interrupt the signal from the sensor.
3. Transmission Fluid Issues: Low or dirty transmission fluid can affect sensor readings.
4. Transmission Control Module (TCM) Problems: A faulty TCM may not process the sensor`s data correctly.
5. Mechanical Issues in the Transmission: Problems like slipping or internal wear can lead to erratic sensor readings.

Manufacturer-Specific Differences:
Porsche: For Porsche vehicles, the issue might also be linked to complex transmission systems like PDK. A software update may be needed.
Mini: In Mini models, especially those with BMW engines, the code might be related to specific software issues that require a reset or reprogramming.
Mercedes-Benz: Mercedes vehicles may have unique transmission control strategies. A diagnostic scan can reveal if the TCM needs reprogramming or if there`s a known software fix.
Audi: Audi models often have advanced diagnostics. Sometimes, a simple reset of the TCM or a software update can resolve the issue.
Jaguar: In Jaguar vehicles, the code could be linked to the adaptive transmission learning process, which may require a relearn procedure.
Land Rover: For Land Rover models, the issue may be more prevalent in older vehicles, where wiring degradation is a common problem.


If you encounter the P2766 code, it`s essential to perform a thorough diagnostic to pinpoint the exact cause. Checking the sensor, wiring, and transmission fluid should be your first steps. If necessary, consult the specific vehicle`s service manual or a professional mechanic for more detailed troubleshooting.
The Engine Fault Code P2766 indicates a problem with the Input/Turbine Speed Sensor B Circuit. This sensor measures the speed of the transmission`s input shaft, which helps the engine control module (ECM) manage shifting and performance. Heres how you can approach fixing this issue, along with manufacturer-specific differences:

General Steps to Fix P2766:

1. Check the Wiring and Connectors:
– Inspect the wiring harness and connectors for damage, corrosion, or loose connections. Repair or replace any damaged components.

2. Test the Sensor:
– Use a multimeter to test the Input/Turbine Speed Sensor. Check for proper resistance and voltage according to your vehicle`s service manual. If the sensor is faulty, replace it.

3. Inspect the Transmission Fluid:
– Low or dirty transmission fluid can cause sensor issues. Check the fluid level and condition. If it`s low, top it off; if it`s dirty, consider a fluid change.

4. Clear the Code:
– After making repairs, use an OBD-II scanner to clear the fault code and take the vehicle for a test drive to see if the code returns.

Manufacturer-Specific Considerations:

#Porsche:
– Model-Specific Sensors: Some Porsches may have unique sensors or wiring configurations. Consult the service manual for your specific model.
– Transmission Type: If your Porsche has a dual-clutch transmission (PDK), ensure that the transmission control module (TCM) is also functioning correctly.

#Mini:
– Sensor Location: The Input/Turbine Speed Sensor may be located on the transmission housing. Refer to the Mini service manual for precise location and replacement steps.

#Mercedes-Benz:
– Adaptation: After replacing the sensor, you may need to perform a transmission adaptation using a diagnostic tool to ensure proper function.

#Audi:
– Check for Additional Codes: Audi vehicles may have related codes that can provide more context. Always check for additional fault codes when diagnosing.

#Jaguar:
– Software Updates: Sometimes, a software update for the engine or transmission control module can resolve sensor-related issues. Check with a dealer for updates.

#Land Rover:
– Complex Systems: Land Rover vehicles often have complex electronic systems. If basic checks dont resolve the issue, consider seeking professional help or using a specialized diagnostic tool.

Final Notes:
If youre not comfortable performing these steps, or if the issue persists after your repairs, it may be best to consult a professional mechanic. They can provide a thorough diagnosis and ensure that any underlying issues are properly addressed.
Driving with a P2766 code, which relates to the Input/Turbine Speed Sensor B Circuit Range/Performance, is generally not safe. This code usually indicates a problem with the transmission or the sensor that measures the speed of the turbine in the transmission. Heres why its important to address this issue:

1. Transmission Performance: The turbine speed sensor helps the transmission control module (TCM) determine how to shift gears. If its malfunctioning, you may experience poor shifting, slipping, or even complete transmission failure.

2. Safety Concerns: If the transmission isnt functioning properly, it could lead to unexpected behavior while driving, like sudden loss of power or difficulty accelerating. This can be dangerous, especially in traffic.

3. Potential Damage: Ignoring this code can lead to more significant damage to the transmission, which can be costly to repair.

Manufacturer Differences:
Porsche: In Porsches, a faulty turbine speed sensor can lead to rough shifting or a failure to engage gears. It`s best to get it checked immediately.

Mini: Mini vehicles may show symptoms like a warning light and erratic shifting. Its crucial to diagnose the issue quickly.

Mercedes-Benz: In Mercedes cars, this code can cause the transmission to go into limp mode, limiting speed and power. This is a safety feature meant to protect the vehicle.

Audi: For Audis, you might notice delayed shifting or erratic behavior. It`s advisable to have it checked to avoid further damage.

Jaguar: Jaguars may display similar issues, and its best to address them quickly to maintain performance and safety.

Land Rover: In Land Rovers, this code can lead to transmission problems that may affect off-road capabilities. Its important to resolve it before serious driving.


If you see a P2766 code, its best to avoid driving the vehicle until the issue is diagnosed and repaired. Consult a professional mechanic who specializes in your vehicle brand for the best advice and service.

OBD Codes Explained

Engine Codes

P is for PowerTrain - Engine and Transmission.

P0 Indicates Generic Powertrain Codes

P0 Codes indicate problems with the powertrain and are common for all vehicles using the OBD-II Standard.

P1 Enhanced Manufacturer Specific Codes

P1 Codes are specific to manufacturers.

Sub-System

The 3rd Digit indicates the Sub-System

1 – Emission Management

2 – Injector Circuit

3 – Ignition

4 – Emission Control

5 – Vehicle Speed and Idle

6 – Computer and Output

7 – Transmission

8 – Transmission

9 – Reserved

0 – Reserved

0
    0
    Your Cart
    Your cart is emptyReturn to Shop

    Need parts advice?

    Tell us what you need and we will be in touch shortly.

    Contact Information
    Vehicle Information