1. Home
  2. Knowledge Centre
  3. Latest News
  4. Diagnostic help

Solution for error code P0705: Mercedes transmission malfunction

Continental 7G-tronic (722.9) First, Second and Third Generation - TCUs
Continental 7G-tronic (722.9) First, Second and Third Generation

TCUs

Register to see pricing

Continue

Error code P0705 indicates a malfunction in the transmission range sensor circuit, specifically in the Continental 7G-tronic (722.9). This TCU was introduced in 2003 for the Mercedes models that used an 8-cylinder engine. Models in which this part often fails include the Mercedes-Benz E-Class and M-Class. This part was produced until 2019. This gearbox computer is crucial for the correct operation of the automatic transmission, because it determines the position of the gear lever and transmits this information to the engine management system. Problems with this sensor can lead to several driving problems and should be addressed quickly.

Cars in which error code P0705 is read

Symptoms of Error Code P0705

The following symptoms may indicate a problem with the transmission range sensor:

  • Gear indicator not working correctly
  • Transmission does not shift or shifts unusually
  • Vehicle does not start
  • Transmission goes into limp mode
  • Warning light "Check Engine" illuminates
  • Decreased transmission performance

Solution for error code P0705

The most effective solution for solving this Mercedes transmission malfunction with error code P0705 at Mercedes is to have the 722.9 TCU overhauled. This often includes replacing or repairing various sensors, as well as inspecting and repairing any other internal components that may be damaged. ACTRONICS offers an effective overhaul solution for the Continental 7G-tronic (TCU), where the module is thoroughly tested and equipped with new components to ensure a long lifespan and reliable operation. Do you have any questions? Please feel free to contact us!