The Volkswagen Diagnostic Trouble Code (DTC) 17105 (or sometimes indexed as P1711, 008) indicates a problem within the Transmission Range Sensor Circuit. This sensor is also commonly known as the Neutral Safety Switch or F125 sensor. Clearing the code requires addressing the underlying malfunction; simply clearing it without repair will cause it to return. Here are effective and affordable options for resolution:
Repair Solutions for DTC 17105/P1711/008
1. Replace the Transmission Range Sensor / F125 Sensor (Most Common Fix)
- The most frequent cause is a faulty sensor itself.
- DIY Option: If mechanically inclined, you can replace the sensor. It's typically located on the transmission housing near the gear selector shaft. Requires VW-specific tools (like VCDS, OBDeleven) for proper calibration after installation.
- Cost-Saving Tip: Source a quality replacement part (OE or reputable aftermarket like Febi Bilstein, Vaico) from auto parts suppliers. Ensure it's compatible with your specific VW model and transmission.
- Professional Repair: An independent VW specialist garage is generally more affordable than a dealership. Provide them with the diagnostic code to streamline the process.
2. Inspect Wiring Harness & Connectors
- Damage, corrosion, or loose connections in the wiring harness or at the sensor/TCU connectors can trigger this code.
- Visually inspect the wiring running to the sensor (located on the transmission) and the connectors at the sensor and the Transmission Control Unit (TCU). Look for pinches, fraying, or corrosion.
- Check for bent pins inside the connectors. Ensure connectors are fully seated and locked.
- Affordable solution if the problem is visible damage or corrosion that can be repaired (wiring splice) or cleaned.
3. Verify Gear Selector Alignment & Linkage
- Incorrect mechanical linkage adjustment between the gear selector and the transmission sensor can prevent the sensor from reporting the correct position.
- Check for any signs of damage or binding in the linkage cables or rods.
- Adjusting the linkage requires specific procedures (often needing scan tool verification) but can be a low-cost fix if misalignment is the sole issue.
4. Software Adaptation / Recalibration
- Sometimes, clearing the DTC and performing a basic setting/adaptation of the Transmission Range Sensor using a professional scan tool (like VCDS, ODIS, OBDeleven Pro) is necessary after sensor replacement or linkage adjustment.
- This step ensures the transmission control unit accurately understands the sensor's position signals. Skipping adaptation often causes immediate return of the DTC or erratic shifting.
Important Notes
Clearing the Code:
- The DTC can be cleared using any compatible OBD2 scan tool, VCDS, OBDeleven, etc.
- However, it will only stay cleared if the underlying fault has been successfully repaired. Clearing it beforehand is only useful to verify the repair after it's done.
Affordability Focus:
- Avoid Dealership Labor: Independent VW specialists almost always offer significantly lower hourly rates than VW dealerships.
- Self-Source Parts: Research and purchase the correct sensor yourself from reputable suppliers.
- Diagnostic Fees: Confirm if a shop charges diagnostic fees separately. Some will credit this fee against the final repair cost.
Severity: This fault often prevents proper operation of the starter circuit (won't start in Park/Neutral), cruise control, reverse lights, and causes erratic shifting. Timely repair is advised. Ignoring it can lead to being stranded or transmission damage.
