A common issue when dealing with Volkswagen Audi Group (VAG) vehicles is encountering key programming problems. One specific error code, 01179 in VCDS (VAG-COM Diagnostic System), indicates “Incorrect Key Programming.” This article delves into the meaning of this error, potential causes, and troubleshooting steps. This specific case study involves a 2009 Jetta SportWagen experiencing this error after attempting to program a new key.
Decoding 01179 VCDS and Its Implications
The 01179 Vcds error code signifies a problem with the key’s programming within the vehicle’s immobilizer system. This system prevents unauthorized starting of the engine by verifying a unique code embedded in the key. An incorrect or incomplete programming process triggers this error, rendering the key unusable for starting the car or unlocking the doors.
Potential Causes of 01179 VCDS Fault Code
Several factors can contribute to the 01179 VCDS error. These include:
- Incorrect Programming Procedure: Deviation from the manufacturer’s specified programming steps, even minor ones, can lead to this error. This is a crucial factor when using aftermarket keys or programming tools.
- Faulty Key or Transponder: A damaged or defective key, particularly the transponder chip within it, can prevent successful programming. This includes issues with new aftermarket keys.
- Immobilizer System Malfunction: Problems within the car’s immobilizer system itself, such as a faulty control module or wiring harness, can hinder proper key programming.
- Low Battery Voltage: Insufficient battery voltage during the programming process can interrupt the procedure and result in an error. A stable power supply is essential for programming.
- Software or Hardware Incompatibility: Using outdated or incompatible VCDS software or hardware with the vehicle’s system can lead to communication errors and programming failures.
Troubleshooting 01179 with VCDS
Resolving the 01179 error typically involves careful diagnosis and systematic troubleshooting:
- Verify the Programming Procedure: Double-check each step of the programming procedure against the official instructions provided by the vehicle manufacturer or reputable sources. Ensure the correct VCDS procedures are followed for the specific car model and year.
- Test with a Known Good Key: If available, try programming a known working key to rule out a problem with the immobilizer system. Success with a known good key isolates the issue to the new key.
- Check Key and Transponder: Inspect the new key for any physical damage. Consider trying a different transponder chip or obtaining a new key from a different supplier if faulty key components are suspected.
- Inspect Immobilizer System Components: A more advanced step involves checking the immobilizer system’s components, such as the control module, wiring, and antenna, for any signs of damage or malfunction. This often requires specialized diagnostic equipment.
- Ensure Sufficient Battery Voltage: Maintain a stable battery voltage during the programming process using a battery charger or jump starter if necessary. Low voltage is a common cause of programming interruptions.
- Update VCDS Software and Hardware: Ensure that the VCDS software and hardware are updated to the latest versions compatible with the vehicle. Using outdated versions can cause communication errors. Consult Ross-Tech’s official website for compatibility information.
Case Study Specifics & Considerations
In the specific case of the 2009 JSW, the owner attempted programming with a non-dealer key and encountered the 01179. While the dealer successfully programmed the key for ignition, the remote functions remained unprogrammed. The subsequent attempts with provided chipsets and a VAG-COM cable failed. This suggests:
- Compatibility Issues with Aftermarket Key: The non-dealer key or provided chipsets may be incompatible with the vehicle’s immobilizer system. This highlights the importance of using OEM keys or confirming compatibility with trusted sources.
- Potential Immobilizer System Fault: While less likely given the dealer’s partial success, a deeper investigation of the immobilizer system, focusing on the Central Convenience module (address 46 in the provided scan), is warranted. The coexisting 00332 fault related to the fuel tank flap may indicate a broader wiring issue.
Conclusion
The 01179 VCDS error, “Incorrect Key Programming,” points to a critical issue with a VAG vehicle’s immobilizer and key communication. While often resolved through meticulous adherence to programming procedures and ensuring key/hardware compatibility, more complex cases might require professional diagnostic expertise to address potential immobilizer system malfunctions. In this particular 2009 JSW scenario, focusing on key compatibility and examining the Central Convenience module for faults will likely lead to a solution.
