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Engine Fault Code P0608

Control Module VSS Output A

Care Engine Code Reader
The Engine Fault Code P0608 refers to a problem with the control module`s Vehicle Speed Sensor (VSS) output A. This code is often related to issues in the engine control module (ECM) or problems with the vehicle speed sensor itself.

Here are some common interpretations and possible causes:

1. Faulty Vehicle Speed Sensor: The sensor might be malfunctioning or sending incorrect signals to the ECM.

2. Wiring Issues: Damaged or corroded wiring or connectors related to the VSS can cause this code to trigger.

3. ECM Problems: The engine control module itself could have faults or software issues that need to be addressed.

4. Transmission Issues: Sometimes, problems in the transmission can affect the VSS output, leading to this code.

5. Calibration Issues: If the ECM has been recently replaced or reprogrammed, it might need recalibration.

It`s important to note that while P0608 is generally consistent across many manufacturers, the specifics can vary. Here are some alternative meanings or nuances based on different manufacturers:

Porsche: Similar to the general definition, but may relate more closely to performance and handling systems.

Mini: Often linked with issues in the speedometer or traction control systems.

Mercedes: May also indicate a problem with the adaptive transmission control, affecting shifting.

Audi: Similar to Porsche, but can also involve the Quattro system if equipped.

– Jaguar and Land Rover: These vehicles may link this code to advanced driving aids or terrain response systems.

If you encounter this code, it`s best to use a diagnostic tool to read live data and pinpoint the exact issue. Always consult the vehicles service manual for specific troubleshooting steps for your make and model.
The Engine Fault Code P0608 indicates an issue with the control module`s Vehicle Speed Sensor (VSS) output A. This code can arise from various causes, and while the basic idea is similar across different makes, there can be some variations depending on the manufacturer. Here are some common causes:

1. Faulty Vehicle Speed Sensor: The most common reason is a malfunctioning VSS. It may not be sending the correct speed data to the control module.

2. Wiring Issues: Damaged or corroded wiring or connectors can disrupt the signal between the VSS and the control module.

3. Control Module Failure: The engine control unit (ECU) itself may have a fault that affects its ability to read the VSS data.

4. Software Issues: Sometimes, outdated or corrupted software in the control module can lead to incorrect readings or failures.

5. Transmission Problems: In some cases, issues within the transmission can affect the speed sensor`s operation.

6. Grounding Issues: Poor grounding can cause electrical problems, leading to incorrect signals being sent.

Manufacturer-Specific Considerations:

Porsche: May have unique wiring harness issues due to the compact design of their vehicles. Check for specific software updates for the control module.

Mini: Often has a complex wiring system. Look for any known issues with the VSS in the specific model year.

Mercedes: Mercedes vehicles may have specific adaptations in their control modules that could lead to false readings. It`s important to verify if any TSBs (Technical Service Bulletins) exist for the issue.

Audi: Audi vehicles can have issues with the CAN (Controller Area Network) communication, which might also lead to this code.

Jaguar: Look for any software updates or recalls related to the VSS, as Jaguars can sometimes have unique electronic issues.

Land Rover: These vehicles often have complex electronic systems. A thorough inspection of the wiring and connectors is crucial.


When diagnosing code P0608, it`s essential to check the VSS, wiring, and control module thoroughly. Consider manufacturer-specific quirks and updates that may apply to your vehicle. Always refer to a repair manual or professional service for accurate troubleshooting.
The engine fault code P0608 refers to a problem with the control module`s Vehicle Speed Sensor (VSS) output A. This code can appear in various European cars, including Porsche, Mini, Mercedes, Audi, Jaguar, and Land Rover. Heres a general approach to fixing it, along with manufacturer-specific notes:

General Steps to Fix P0608:

1. Check the Battery and Connections:
– Ensure the battery is fully charged and connections are clean and tight. A weak battery can cause various codes.

2. Inspect Wiring and Connectors:
– Look for damaged or corroded wiring and connectors related to the VSS. Repair or replace any damaged parts.

3. Scan for Additional Codes:
– Use an OBD-II scanner to check for other codes that might help diagnose the issue. Sometimes, P0608 can be accompanied by other related codes.

4. Test the VSS:
– Locate the Vehicle Speed Sensor. Depending on the make and model, it might be on the transmission or near the wheel hubs.
– Use a multimeter to test the sensors resistance and output. Compare readings to the manufacturers specifications.

5. Check the Control Module:
– If the VSS tests fine, the issue might be with the control module itself. Inspect for any signs of damage or water intrusion.

6. Clear the Codes and Test Drive:
– After making repairs, clear the fault codes and take the vehicle for a test drive to see if the code returns.

Manufacturer-Specific Notes:

Porsche:
– Check the speed sensor located on the transmission. Porsche models may also have specific software updates that could affect sensor readings.

Mini:
– Mini vehicles often have integrated control modules. Make sure to check the software version and update if necessary.

Mercedes:
– Mercedes cars may have multiple VSS locations. Ensure you test all possible sensors, especially if equipped with a 4MATIC system.

Audi:
– Audi models might have a dual VSS setup. Make sure both sensors are functioning correctly.

Jaguar:
– On Jaguars, the VSS is often part of the ABS system. Check for ABS-related codes and issues.

Land Rover:
– Land Rover vehicles can have complex wiring. Pay special attention to the harness connections and check for any common issues related to the model year.

Final Thoughts:
If after all these checks the problem persists, it might be best to consult a professional mechanic or a dealership. They can provide more advanced diagnostics and repairs specific to your vehicle model.
Code P0608 refers to a problem with the vehicle`s control module, specifically related to the Vehicle Speed Sensor (VSS) output. This code can indicate that the control module is not receiving the correct signals from the VSS, which can affect the vehicle`s performance and safety.

General Safety Considerations:
1. Driving with P0608:
– It`s generally not safe to drive with this code. The vehicle may experience erratic speedometer readings, shifting issues, or even stalling.
– If the control module can`t accurately read speed, it can lead to problems with cruise control and may affect traction control systems.

2. Manufacturer Differences:
Porsche: Porsche vehicles may enter a `limp mode,` limiting performance. It`s best to address the issue before driving.
Mini: Mini cars might show reduced power or odd shifting patterns. It`s advisable to get it checked soon.
Mercedes: Mercedes vehicles may display multiple warning lights and could experience transmission issues. Avoid driving until repaired.
Audi: Audi models may have similar symptoms as Mercedes, including transmission irregularities. It`s safer to fix the issue first.
Jaguar: Jaguar vehicles can face performance drops. It`s better to have it diagnosed before driving.
Land Rover: Land Rover models might experience off-road mode issues or limited functionality. Repairs should be prioritized.


While the severity of driving with code P0608 can vary by make and model, it`s generally not safe to continue driving your vehicle without addressing the issue. It`s best to have a qualified mechanic diagnose and fix the problem to ensure safe operation.

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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