Mercedes TCU Repair

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Standard 2 year warranty

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The TCU Temic VGS 722.8 is a CVT model that often requires repairs in the Mercedes A and B class. These models were produced between 2003 and 2013. The technicians of ABS Control Devices from Beverwijk are familiar with the various actions and revisions required to ensure that the CVT or TCU of your Mercedes runs optimally again.

TCU repair on a Mercedes : Possible electronic error codes

There are two aspects that determine the mechatronics in a Mercedes TCU repair: mechanical and electrical. The operation of the CVT is controlled by mechatronics. The mechanical part is the labyrinth of channels and valves that control various components within the CVT. The electronic part is the Temic VGS. If error codes are stored here from the internal speed sensors, this is a very good indication of a defective transmission control module. When your vehicle's ECU is scanned with diagnostic equipment, you will see the most common error code:

2722 Impermissible closing of hydraulic brake
2723 Impermissible opening of hydraulic brake
2731 Impermissible closing of hydraulic clutch
2732 Impermissible opening of hydraulic clutch
0722 speed sensor Y3/9b5
0793 speed sensor Y3/9b4

The moment one of the above error codes is read, it is almost inevitable not to carry out a TCU repair on your Mercedes .

TCU Mercedes-Benz 7G-Tronic

This TCU is an automatic gearbox and was the first with seven gears for passenger cars in 2003. These were produced for Mercedes by Continental. This TCU is also part of the mechatronics of the gearbox. When scanned by the diagnostic equipment, the following error codes may be displayed:

P0717/P0718 – Y3/8n1
P2766/P2767/P2768 – Y3/8n2
P0720/P0721/P0722/P0723 – Y3/8n3

Make an appointment to diagnose your car

Do you want a TCU repair for your Mercedes? Then make an appointment at ABS Control Devices in Beverwijk, de specialist in electronics. Our technicians repair the identified ones error messages in your transmission . Do you have any further questions or would you like to know more about our method ? Please contact us at our contact form .

Possible Error Codes

The most common problems and error codes with the automatic transmission:

Mercedes A-class W169 & B-class W245

Consult transmission workshop: Display
P0793 – Y3/9b4 The speed signal (CVT (continuously variable automatic transmission) speed secondary sensor) is not available,
P0722 – Y3/9b5 The speed signal (CVT (continuously variable automatic transmission) speed secondary sensor) is not available,
P0896 – Invalid CVT setting range,
P0794 – Display of the secondary sensor of the revolutions (Y3 / 9b4), maximum value exceeded,
P0717 – Y3/9b3 element revolution speed signal (CVT (continuously variable automatic transmission) primary sensor revolution speed) not available
P0794 – Display of primary sensor revolutions (Y3 / 9b3), maximum value exceeded,
P0730 – Gear ratio in continuously variable automatic transmission CVT not permitted,

Mercedes 7-G Tronic

0721 – The signal from component Y3/8n3 (Output speed sensor VGS)
0717 – The signal from component Y3/8n1 (Turbine speed sensor VGS)
0722 – The signal from component Y3/8n3 (Output speed sensor VGS)
2767 – The signal from component Y3/8n2 (Internal speed sensor VGS)

Y3/8N1 – Turbine speed sensor

P0717 – The signal from component Y3/8n1 (Turbine speed sensor (VGS)) is not available
P0718 – Component Y3/8n1 (Turbine speed sensor (VGS)) is defective

Y3/8N2 – Speed sensor internal

P2200 – The signal from component Y3/8n2 (Internal speed sensor (VGS)) in not available
P2201 – Component Y3/8n2 (Internal speed sensor (VGS)) is defective
P2767 – The signal from component Y3/8n2 (Internal speed sensor (VGS)) in not available
P2768 – Component Y3/8n2 (Internal speed sensor (VGS)) is defective