What Causes VW Tiguan P1735 & P1736 Fault Codes?

The P1735 and P1736 fault codes indicate that the DSG mechatronic unit has detected an implausible clutch position signal within the DQ381 transmission system.

The DQ381 DSG transmission uses a dual-clutch system with two separate clutch packs. One clutch controls odd gears (1, 3, 5, 7) while the other controls even gears (2, 4, 6). The mechatronic unit constantly monitors clutch position, hydraulic pressure and gear engagement data to ensure smooth and precise shifting performance.

When internal electronic or circuit board faults develop inside the mechatronic unit, clutch position signals can become inaccurate or unstable. As a result, the transmission control module may lose communication or confidence in clutch engagement values, causing gear selection faults and transmission malfunction.

Common symptoms may include:

• Loss of odd or even gears
• PRNDS flashing
• Harsh shifting or jerking
• Transmission warning messages
• Limp mode activation
• Gear engagement failure
• No drive condition

At Autobunkerz, we specialise in DQ381 mechatronic diagnostics and repair for Volkswagen and Audi vehicles. Many P1735 and P1736 faults are caused by internal mechatronic electronic failures rather than complete gearbox failure.

We provide advanced PCB level diagnostics, circuit board repair, hydraulic system repair, programming and adaptation using professional diagnostic equipment.

For hydraulic related repairs, genuine Volkswagen parts are used to ensure reliable long-term repair quality.

We also supply tested second-hand mechatronic units and brand new replacement parts.