The engine fault code P0959 refers to an issue with the Auto Shift Manual Mode Circuit, and it indicates that there is an intermittent problem with the system that allows you to manually shift gears in an automatic transmission. This code can come up in various vehicles, including those from European manufacturers like Porsche, Mini, Mercedes, Audi, Jaguar, and Land Rover.
Heres a breakdown of what this code means:
1. Auto Shift Manual Mode: This feature lets drivers manually select gears in an automatic transmission. Its commonly found in performance-oriented vehicles.
2. Circuit Intermittent: This part of the code indicates that the fault is not constant. It might happen sometimes and not others, which can make it tricky to diagnose.
Possible Causes:
– Faulty wiring or connectors in the manual mode circuit.
– A malfunctioning transmission control module (TCM).
– Problems with the gear shift mechanism.
– Issues with the transmission itself.
Manufacturer Variations:
While P0959 generally means the same thing across different manufacturers, some may have slightly different interpretations or additional codes related to the same issue. Here are a few examples:
– Porsche: May have specific transmission-related codes that indicate more detailed problems with the PDK system.
– Mini: Could also relate to issues with the BMW-designed automatic transmission, which might have its own set of codes.
– Mercedes: Might provide additional codes that relate to the specific model`s transmission features.
– Audi: Similar to Volkswagen, it may have extra codes for the DSG transmission.
– Jaguar and Land Rover: These brands may also include codes related to their unique transmission systems.
Recommended Actions:
1. Check Wiring: Look for damaged or loose wires and connectors in the manual mode circuit.
2. Scan Tool: Use an OBD-II scanner to check for other related codes that might give more context.
3. Inspect Transmission: If the issue persists, consider having a professional inspect the transmission system.
Always refer to the specific service manual for your vehicle for the most accurate diagnosis and repair steps.
The engine fault code P0959 refers to a problem with the Auto Shift Manual Mode Circuit. This code usually indicates that there is an intermittent issue with the system that controls the manual shifting feature in an automatic transmission. Here are some common causes and manufacturer-specific variations:
Common Causes:
1. Wiring Issues: Damaged or corroded wires in the circuit can lead to intermittent signals.
2. Faulty Transmission Control Module (TCM): If the TCM is malfunctioning, it may not communicate properly with the manual shift mode.
3. Bad Shift Lever or Selector Switch: If the shift lever or switch is faulty, it might not correctly signal the transmission to enter manual mode.
4. Transmission Fluid Issues: Low or dirty transmission fluid can affect the operation of the transmission and might trigger this code.
5. Sensor Problems: Faulty sensors related to the transmission can cause incorrect readings and trigger the code.
Manufacturer-Specific Considerations:
– Porsche: On models like the Cayenne or Macan, a faulty TCM or wiring issues in the shift assembly can be more common.
– Mini: For Mini vehicles, the code might be linked to the gear selector module, which can fail or have connection issues.
– Mercedes: In Mercedes cars, especially those with 7G-Tronic transmissions, a common issue might be with the conductor plate or wiring harness.
– Audi: Audi vehicles, particularly those with multitronic CVTs, can have issues with the transmission control unit or the selector lever.
– Jaguar: In Jaguars, problems with the transmission control module or software issues can lead to this code.
– Land Rover: For Land Rover models, wiring harness issues or a failing TCM are often the culprits.
If you encounter the P0959 code, it`s best to start with a thorough inspection of the wiring and connections. Checking the TCM and related components is also crucial. Depending on the specific make and model, the troubleshooting steps may vary, so it`s wise to refer to the service manual for your vehicle. Always consider getting a professional diagnosis if you`re unsure.
The P0959 code indicates an issue with the Auto Shift Manual Mode Circuit, which can vary in its causes and fixes depending on the vehicle manufacturer. Heres a general approach to fixing it, along with some manufacturer-specific tips for Porsche, Mini, Mercedes, Audi, Jaguar, and Land Rover.
General Steps to Fix P0959:
1. Check the Battery and Connections: Make sure the battery is fully charged and the connections are clean and tight. Low voltage can cause electronic issues.
2. Inspect the Wiring: Look for damaged or corroded wires in the auto shift manual mode circuit. Repair or replace any damaged wiring.
3. Check the Shift Selector Switch: The shift selector switch might be faulty. Test it for proper operation and replace it if necessary.
4. Scan for Additional Codes: Use an OBD-II scanner to check for any other codes that might provide more context for the issue.
5. Clear the Code: After making repairs, clear the code and take the car for a test drive to see if the code returns.
6. Check the Transmission Control Module (TCM): If the problem persists, the TCM could be malfunctioning. Testing or reprogramming may be needed.
Manufacturer-Specific Tips:
#Porsche:
– Check for Software Updates: Sometimes, software glitches can cause this code. Check with a Porsche dealer for any updates to the transmission control software.
#Mini:
– Inspect the Gear Selector: The gear selector on Mini vehicles can be prone to wear. Ensure its functioning correctly and replace if necessary.
#Mercedes:
– Transmission Fluid Level: Low or dirty transmission fluid can lead to shifting issues. Check and change the fluid if needed.
#Audi:
– Mechatronic Unit: Audi vehicles may have issues with the mechatronic unit. If other solutions dont work, this component may need inspection or replacement.
#Jaguar:
– Check for TCM Issues: Jaguars can have specific TCM issues. Look for any recalls or service bulletins related to the transmission.
#Land Rover:
– Look for Faulty Sensors: Land Rovers may have faulty input or output speed sensors that can trigger this code. Inspect and replace if necessary.
Start with the basics like checking the battery and wiring, and then move on to more specific components based on your vehicle`s brand. If youre not comfortable with any of these steps, its a good idea to consult with a professional mechanic.
Driving with a Code P0959, which refers to an `Auto Shift Manual Mode Circuit Intermittent` issue, can be risky. This code indicates a problem with the manual mode of your vehicle`s transmission system. Heres a breakdown of what you should consider:
General Risks:
1. Transmission Performance: The vehicle may not shift properly, leading to poor acceleration or unexpected shifts.
2. Safety Concerns: Inconsistent shifting could make it hard to control the vehicle, especially in high-speed situations or during sudden stops.
3. Potential Damage: Continuing to drive with this code might cause further damage to the transmission, leading to more costly repairs.
Manufacturer-Specific Considerations:
1. Porsche: Porsche vehicles often have advanced transmission systems. If you see this code, it`s best to get it checked as it might affect performance and handling.
2. Mini: Mini models may have different transmission setups. If you experience any rough shifting or warning lights, it`s advisable to avoid driving until it`s diagnosed.
3. Mercedes: Mercedes vehicles are equipped with sophisticated electronics. If this code appears, it can lead to limp mode, where the car limits performance to protect the transmission.
4. Audi: Audi`s dual-clutch systems can be sensitive. If you notice this code, its better to consult a mechanic to avoid any complications.
5. Jaguar: Jaguar vehicles may have unique transmission issues. If this code is present, it`s wise to limit driving until a professional can inspect it.
6. Land Rover: Land Rovers off-road capabilities can be compromised if there`s a transmission issue. It`s best to avoid driving until you can get it checked.
While you might be able to drive short distances with this code, it`s generally not safe to do so. Each manufacturer has specific systems and potential consequences, so it`s best to have the vehicle inspected by a qualified mechanic as soon as possible. This ensures your safety and helps prevent further damage to your car.
