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Engine Fault Code P0965

Pressure Control Solenoid B Control Circuit Range/Performance

Care Engine Code Reader
Engine Fault Code P0965 refers to an issue with the pressure control solenoid B in the transmission system. This code indicates that the control circuit for this solenoid is not performing as expected. The solenoid helps manage the hydraulic pressure in the transmission, which is crucial for smooth shifting and overall transmission performance.

While the basic meaning of P0965 is similar across different manufacturers, there can be slight variations in how its interpreted or what it affects based on the vehicle:

1. Porsche: In Porsche vehicles, this code may relate to the PDK (Porsche Doppelkupplung) transmission, indicating issues with the pressure control that could affect shifting performance.

2. Mini: For Mini, this code could be linked to the automatic transmission, suggesting that the transmission control module is detecting a fault in the solenoid`s operation.

3. Mercedes-Benz: In Mercedes vehicles, P0965 might indicate a problem with the 7G-Tronic transmission, suggesting that the pressure control solenoid B is not providing the correct hydraulic pressure.

4. Audi: Similar to Mercedes, Audi vehicles may interpret this code as a sign of malfunction in the DSG (Direct Shift Gearbox) transmission system, potentially leading to rough shifting or slipping.

5. Jaguar: For Jaguar, this code could indicate issues with the transmission control system, leading to performance problems or warning lights on the dashboard.

6. Land Rover: In Land Rover models, P0965 may suggest a transmission fault that could affect off-road capabilities or towing performance.

In all cases, diagnosing the exact issue is essential. It could be a simple electrical problem, like a bad connector or wiring issue, or it might require replacing the solenoid itself. Always consult the specific service manual for the vehicle in question for the most accurate diagnosis and repair steps.
The Engine Fault Code P0965 indicates an issue with the pressure control solenoid B in the transmission system. This code typically means that the performance or range of the solenoid is not within the expected limits. Here are some common causes for this code, along with manufacturer-specific details:

Common Causes:
1. Faulty Pressure Control Solenoid B: The solenoid itself may be malfunctioning and need replacement.

2. Wiring Issues: Damaged or corroded wires and connectors in the solenoid circuit can cause poor performance. Check for shorts, breaks, or loose connections.

3. Transmission Fluid Issues: Low, dirty, or contaminated transmission fluid can affect solenoid performance. Ensure the fluid is at the correct level and in good condition.

4. Transmission Control Module (TCM) Problems: A malfunction in the TCM can lead to incorrect signals being sent to the solenoid.

5. Mechanical Issues: Problems within the transmission, such as sticking valves or internal leaks, can also trigger this code.

Manufacturer-Specific Details:
Porsche: For some Porsche models, the issue may be tied to the specific transmission type (e.g., PDK). Check for software updates or recalls related to the transmission control system.

Mini: In Mini vehicles, this code can sometimes be related to the electronic control unit. Ensure that the battery is in good condition, as low voltage can affect solenoid operation.

Mercedes: Mercedes models may have more complex transmission systems. Check for any additional codes that may indicate a broader issue with the transmission.

Audi: Audi vehicles often have advanced transmission systems. If the code appears, inspect for any software-related updates or known issues with the specific model year.

Jaguar: In Jaguar cars, the issue can sometimes be linked to adaptive transmission settings. A reset of the transmission control module may be necessary after repairs.

Land Rover: For Land Rover models, this code might be related to the air intake or engine performance, which can indirectly affect transmission operation. Ensure all engine systems are functioning properly.


If you encounter the P0965 code, it`s essential to perform a thorough diagnostic to pinpoint the exact issue. Checking the solenoid, wiring, fluid condition, and TCM are good starting points. Depending on the manufacturer, additional checks may be necessary to resolve the problem effectively.
The P0965 code refers to a problem with the Pressure Control Solenoid B in the transmission system. This solenoid controls the pressure of the transmission fluid, and if its not working properly, it can lead to shifting issues. Heres how to troubleshoot and fix the P0965 code, along with some manufacturer-specific notes.

General Steps to Fix P0965:

1. Check for Other Codes: Before diving into repairs, use an OBD-II scanner to check for any other trouble codes. Sometimes, multiple codes can help pinpoint the issue.

2. Inspect Wiring and Connectors: Look for any damaged wires or loose connections related to the pressure control solenoid. Repair or replace any faulty components.

3. Check Transmission Fluid Level: Low or dirty transmission fluid can cause issues. Ensure the fluid is at the correct level and is in good condition. If its dirty, consider changing it.

4. Test the Solenoid: You can test the solenoid with a multimeter. Check the resistance according to the manufacturers specifications. If its out of range, replace the solenoid.

5. Inspect the Transmission Control Module (TCM): If the solenoid and wiring are fine, the issue might be with the TCM. Check for updates or faults in the TCM.

6. Clear the Code and Test Drive: After making repairs, clear the code with the scanner and take the vehicle for a test drive to see if the code reappears.

Manufacturer-Specific Notes:

#Porsche:
– Check for software updates for the TCM, as Porsche often releases updates to fix known issues.
– Inspect the transmission for leaks, as low fluid can affect solenoid performance.

#Mini:
– Look for issues with the gearbox oil pump, as this can impact solenoid performance.
– Ensure the battery is in good condition; low voltage can affect solenoid operation.

#Mercedes:
– Mercedes vehicles often have adaptive transmission settings. A reset of the TCM might be necessary after repairs.
– Check for any recalls related to the transmission system, as these can affect solenoid performance.

#Audi:
– Audi vehicles may require a specific procedure to reset the TCM after replacing the solenoid. Refer to the service manual.
– Inspect for any software issues or updates that may relate to the transmission.

#Jaguar:
– Jaguar vehicles may have unique solenoid designs. Always refer to the specific service manual for testing procedures.
– Check for any known issues with the particular model`s transmission system.

#Land Rover:
– Land Rover vehicles often have complex electronic systems. Make sure to check for any faults in the body control module that could affect the TCM.
– Consider using a specialized scanner that can communicate with Land Rover systems for a more thorough diagnosis.


Fixing the P0965 code involves checking the solenoid, wiring, fluid levels, and possibly the TCM. Always consult the specific service manual for your vehicle for detailed procedures and specifications. If youre unsure, it may be best to consult with a professional mechanic.
Driving with a P0965 code, which indicates an issue with the Pressure Control Solenoid B Control Circuit, is generally not recommended. This code suggests that there is a problem with the transmission system, specifically related to the pressure control solenoid that helps manage the transmission fluid pressure.

Here are some points to consider:

1. Transmission Performance: The transmission may not shift properly, leading to rough or delayed shifts. This can affect your ability to accelerate smoothly.

2. Potential Damage: Continuing to drive with this code can cause further damage to the transmission. If the solenoid isn`t functioning correctly, it might lead to overheating or other issues.

3. Manufacturer Differences:
Porsche: Generally, Porsche vehicles have advanced transmissions. If you see this code, it`s best to address it quickly to avoid costly repairs.
Mini: Mini vehicles can exhibit erratic shifting behavior. It`s advisable to get it checked, as it might lead to more severe transmission issues.
Mercedes: Mercedes vehicles often have complex transmission systems. Driving with this code can lead to poor performance and potential damage.
Audi: Similar to Mercedes, Audi`s sophisticated transmissions can suffer from issues if the solenoid isn`t functioning properly.
Jaguar: Jaguar vehicles may also experience shifting problems. It`s best to address the issue promptly.
Land Rover: Land Rover vehicles can face significant transmission issues if this code appears, so it`s wise to get it checked out.

Our take, while it might be possible to drive short distances with a P0965 code, it is not safe or advisable. It`s best to have the vehicle inspected by a professional mechanic to diagnose and fix the issue.

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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