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Engine Fault Code P2805

Transmission Range Sensor A/B Correlation

Care Engine Code Reader
The Engine Fault Code P2805 refers to a problem with the Transmission Range Sensor, specifically the correlation between Sensor A and Sensor B. This sensor helps the engine control module (ECM) know the position of the transmission gear. When the readings from these two sensors do not match, it triggers the code.

Possible Meanings of P2805 by Manufacturer:

1. General Meaning: The sensors are not aligned or are sending conflicting signals about the transmission`s gear position.

2. Porsche: Similar to the general meaning, but may also indicate issues with the transmission control module (TCM) or wiring.

3. Mini: Could suggest a problem with the transmission itself or the electronic control unit (ECU) not recognizing the gear position correctly.

4. Mercedes: Often indicates a malfunction in the transmission range sensor, which could affect shifting and performance.

5. Audi: Similar to Mercedes, it may point to issues within the transmission system or wiring harness problems.

6. Jaguar: May indicate a need for recalibration of the transmission range sensor or a fault in the transmission control system.

7. Land Rover: Could suggest a fault in the transmission range sensor or the wiring, which may affect the vehicle`s ability to shift gears properly.

Common Symptoms:
– Warning lights on the dashboard
– Difficulty shifting gears
– Unusual transmission behavior

Possible Causes:
– Faulty transmission range sensor
– Wiring issues or poor connections
– Problems within the transmission control module
– Mechanical issues in the transmission itself

Recommended Action:
If you encounter this code, it`s best to have a professional mechanic diagnose the issue. They can check the sensors, wiring, and transmission system to find the root cause.
The Engine Fault Code P2805 indicates a problem with the Transmission Range Sensor A/B Correlation. This sensor helps the vehicle`s computer understand which gear the transmission is in. When the readings from the sensor don`t match up, it triggers this code. Here are some common causes for this code, along with manufacturer-specific differences:

Common Causes:
1. Faulty Transmission Range Sensor: The sensor itself could be malfunctioning.
2. Wiring Issues: Damaged or corroded wires or connectors can disrupt the signal.
3. Transmission Control Module (TCM) Issues: The module that manages the transmission may have faults.
4. Mechanical Problems: Issues within the transmission, like sticking components, can cause incorrect readings.
5. Software Glitches: Sometimes, a software update or reset of the TCM can resolve the issue.

Manufacturer-Specific Differences:
Porsche: For some models, the issue might relate to a specific calibration of the TCM that needs updating.
Mini: The range sensor might be integrated with other components, making it necessary to check the entire assembly.
Mercedes: Mercedes vehicles may also have a more complex wiring harness that can be prone to issues, requiring a detailed inspection.
Audi: In Audis, the problem could be linked to the drive-by-wire system, affecting how the transmission communicates with the engine.
Jaguar: Jaguars might have unique software that needs to be checked for updates, as inconsistencies in programming can trigger this code.
Land Rover: For Land Rovers, the code could indicate a need for recalibration after service or repair work on the transmission.


If you encounter code P2805, start by checking the transmission range sensor and its connections. Depending on the make and model, you may need to consider additional factors specific to that manufacturer. Always consult your vehicle`s service manual for detailed troubleshooting steps.
The Engine Fault Code P2805 refers to a problem with the Transmission Range Sensor A/B correlation. This sensor helps the transmission control module (TCM) know the position of the gear selector. If the sensor readings don`t match, it triggers this code. Heres how to address the issue, with some manufacturer-specific tips:

General Steps to Fix P2805:

1. Check for Other Codes: Always start by scanning for any additional trouble codes. There may be related issues that need addressing.

2. Inspect the Transmission Range Sensor:
– Locate the transmission range sensor on your vehicle. This is usually mounted on the transmission.
– Check for any signs of damage, corrosion, or loose connections. Clean any dirt or debris.

3. Test the Sensor:
– Use a multimeter to check the sensors resistance and voltage output. Compare your readings to the manufacturers specifications.
– If the readings are off, the sensor may need replacement.

4. Check Wiring and Connectors:
– Inspect the wiring harness connected to the sensor for any frays or breaks.
– Ensure that connectors are clean and securely attached.

5. Reset the Codes:
– After making repairs, use an OBD-II scanner to clear the fault codes.
– Take the car for a test drive to see if the code returns.

Manufacturer-Specific Notes:

Porsche:
– Check the transmission control unit (TCU) for updates or faults. Sometimes, a software update can resolve sensor issues.

Mini:
– Look for known issues with the transmission on your specific model. Some Minis have had recalls related to transmission sensor problems.

Mercedes:
– Mercedes vehicles might have a more complex wiring system. If the sensor and wiring look good, consider checking the TCM for faults.

Audi:
– Audis often have multiple sensors. If P2805 appears, check the other related sensors and their connections.

Jaguar:
– Jaguars may require a specific diagnostic tool for accurate readings. If you have access, use it to diagnose the sensor more precisely.

Land Rover:
– Land Rovers sometimes have software issues. Ensure your vehicles software is up to date, as this can affect sensor performance.


Fixing the P2805 code often involves checking and possibly replacing the transmission range sensor. Make sure to inspect wiring and connections thoroughly. If the problem persists, you may need a professional diagnostic to delve deeper into the transmission control system.
Driving with a P2805 code, which indicates a problem with the Transmission Range Sensor A/B correlation, isn`t ideal. This code typically means that the transmission control module is detecting a mismatch between the actual position of the transmission and what the sensor is reporting. Heres a breakdown of the safety and considerations for various manufacturers:

General Considerations:
1. Shifting Issues: You might experience erratic shifting or be unable to shift into certain gears. This can lead to unsafe driving conditions.
2. Transmission Damage: Continuing to drive with this issue could potentially cause further damage to the transmission.
3. Check Engine Light: The check engine light will likely be on, indicating that there`s a problem needing attention.

Manufacturer-Specific Notes:
1. Porsche: If you have a Porsche, it`s best to avoid driving until the issue is resolved. Porsche transmissions are sensitive, and driving could lead to more significant issues.

2. Mini: For Mini vehicles, the transmission may go into `limp mode,` which limits speed and performance. This is a safety feature, but it`s still best to get it checked soon.

3. Mercedes: Mercedes vehicles may also enter limp mode. Driving can be risky, especially if you lose the ability to shift properly.

4. Audi: Similar to Mercedes, Audi vehicles may exhibit shifting problems. Its advisable to have it checked to avoid potential transmission damage.

5. Jaguar: Jaguars can have complex transmission systems. Driving with this code may lead to further complications, so its best to address it promptly.

6. Land Rover: Land Rovers may also experience performance issues. If you notice any symptoms, it`s best to avoid driving until it`s inspected.


While it may be possible to drive short distances with a P2805 code, its not recommended. The risk of further damage or unsafe driving conditions makes it important to have the issue diagnosed and repaired as soon as possible. Always consult your vehicle`s manual or a professional mechanic for specific guidance related to your car.

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

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