The world of automotive diagnostics can seem complex, filled with cryptic codes that leave you scratching your head. One such code that often pops up for Volkswagen Audi Group (VAG) vehicle owners is “00985.” This article demystifies this common error code, providing you with the knowledge to diagnose and address the issue.
What Does VCDS Error Code 00985 Mean?
In simple terms, the “00985” error code, often accompanied by the description “Internal Control Module Memory Check Sum Error,” indicates a communication problem within your vehicle’s network. This network, known as the CAN bus (Controller Area Network), allows various modules in your car to talk to each other. When this communication breaks down, it can lead to a range of issues.
Think of it like this: your car’s modules are like different departments in a company, each responsible for a specific function. The CAN bus is the communication system they use to coordinate. If their emails aren’t going through, things can get chaotic quickly.
can-bus-network-diagram|CAN bus network diagram|A diagram illustrating the CAN bus network in a car, showing the different modules connected and communicating with each other.
Common Causes of VCDS Error Code 00985
Several factors can disrupt the CAN bus communication and trigger the “00985” code:
- Loose or corroded wiring connections: Just like a bad phone line causes static, poor connections within the CAN bus wiring can interrupt communication.
- Faulty control module: If one of the modules connected to the CAN bus malfunctions, it can disrupt the entire network.
- Low battery voltage: Insufficient power supply can cause modules to behave erratically and trigger communication errors.
- Software glitches: Sometimes, a simple software error within a module can disrupt communication.
corroded-car-wiring-harness|Corroded car wiring harness|Close-up photo of a corroded car wiring harness, with white and green corrosion on the metal connectors.
Troubleshooting and Fixing VCDS Error Code 00985
Before diving into repairs, it’s crucial to confirm that “00985” is the only code present. Other error codes could point to the root cause and help you focus your troubleshooting efforts. Here’s a step-by-step approach to tackling this error:
- Check the Battery and Connections: Ensure the battery terminals are clean, tight, and the battery voltage is within the correct range. A weak battery can cause numerous electrical gremlins.
- Inspect CAN Bus Wiring: Visually inspect the CAN bus wiring for any signs of damage, loose connections, or corrosion. Pay close attention to areas where the wiring may be prone to rubbing or exposure to moisture.
- Scan for Additional Error Codes: As mentioned earlier, other codes can provide valuable clues. Addressing those issues first might resolve the “00985” error as well.
- Update or Reset Modules: If possible, try updating the software of the affected module(s) using a diagnostic tool like VCDS. In some cases, a simple reset of the module may also resolve the issue.
- Consult a Professional: If the problem persists, it’s best to seek help from a qualified automotive electrician or mechanic experienced in working with VAG vehicles and diagnostic tools.
mechanic-using-diagnostic-tool-on-car|Mechanic using diagnostic tool on car|A mechanic plugging a diagnostic tool into a car’s OBD-II port, with the car’s dashboard illuminated.
Frequently Asked Questions About VCDS Error Code 00985
Can I still drive my car with this error code?
It depends on the specific symptoms. While the code itself might not directly prevent driving, the underlying communication issues could impact various systems, such as engine control, transmission, or safety features. It’s safest to diagnose and address the issue promptly.
Is it expensive to fix this error code?
The cost varies widely depending on the root cause. A simple wiring repair could be inexpensive, while replacing a faulty control module can be significantly more costly.
Can I fix this error code myself?
Basic troubleshooting like checking the battery and visually inspecting wiring is possible for DIYers. However, more complex diagnosis and repairs often require specialized knowledge and tools.
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