P2768 on 2005-2011 Mercedes-Benz SLK/SLC (SLK280, SLK300, SLK350, SLK55 AMG) — Input/Turbine Speed Sensor 'B' Circuit Intermittent
1 vehicles · 1 makes · $500-$2,200 repair
Most Reported On
P2768 is an OBD-II diagnostic trouble code meaning “Input/Turbine Speed Sensor 'B' Circuit Intermittent.” A generic OBD-II transmission code. The input/turbine speed sensor reports how fast the torque converter turbine and transmission input shaft are spinning, and the transmission control module uses that against output speed to manage shift timing and torque converter lockup. P2768 sets when the module receives an erratic, irrational, or otherwise unusable signal from the sensor designated 'B' — present but dropping out or implausible rather than completely missing. Because the module is getting bad speed data, you may notice harsh or flaring shifts, no torque converter lockup, delayed engagement, or stalling when coming to a stop. This code is most commonly reported on 2005-2011 Mercedes-Benz SLK/SLC (SLK280, SLK300, SLK350, SLK55 AMG), with repair costs ranging from $500 to $2,200.
Common Causes
Typical Repair Cost
Based on 1 documented vehicle-specific issues. Actual cost depends on root cause and vehicle.
Diagnostic Tools
This is a powertrain code, so a basic OBD-II reader can read it. These read P2768.
ANCEL AD310 Classic OBD-II Scanner
by ANCEL
A simple code reader for engine (P) codes on many compatible OBD-II vehicles. It does not support every vehicle or hybrid/EV application, and it does NOT read body, chassis or network codes; confirm exact-vehicle compatibility before buying.
- Read & clear engine (P) codes
- View freeze frame data
- I/M readiness status
- No batteries or app needed
BlueDriver Pro Bluetooth Scanner
by BlueDriver
Bluetooth scanner with a companion app that reads beyond the engine module — ABS, SRS and transmission — plus manufacturer-specific codes on many vehicles.
- Enhanced diagnostics (ABS, SRS, transmission)
- Repair Reports with verified fixes
- Smog check readiness
- Free app (iOS & Android)
LAUNCH CRP123X V3.0 Elite OBD-II Scanner
by LAUNCH
Handheld scanner covering the four major systems (engine, transmission, ABS, SRS) with live data streaming and graphing.
- Engine, transmission, ABS, SRS diagnostics
- Live data stream & graphing
- AutoVIN for vehicle identification
- Free lifetime updates via Wi-Fi
Autel MaxiCOM MK808S Diagnostic Tool
by Autel
Shop-level tablet with all-system coverage and bi-directional control, so you can command a module rather than only read it.
- All-system diagnostics (25+ modules)
- Bi-directional control & active tests
- Oil reset, EPB, BMS, TPMS, injector coding
- 7-inch touchscreen with Android OS
What you can do yourself, and what needs a shop
Reading the code, clearing it, and watching whether it returns is a driveway job with the right scanner. These steps are not:
- Module programming or software updates — needs the manufacturer software or a J2534 pass-through with a paid subscription.
- Replacing a control module — most are VIN-programmed and immobilizer-registered, so a new one does nothing until it is coded to your car.
- Airbag/SRS component work — a stored fault can deploy a live device.
If the vehicle is still under warranty, check for an open recall or technical service bulletin before buying anything — the repair may already be covered.
As an Amazon Associate, we earn from qualifying purchases. Prices are approximate and may vary.
FAQ
What does P2768 mean?
P2768 stands for "Input/Turbine Speed Sensor 'B' Circuit Intermittent." A generic OBD-II transmission code. The input/turbine speed sensor reports how fast the torque converter turbine and transmission input shaft are spinning, and the transmission control module uses that against output speed to manage shift timing and torque converter lockup. P2768 sets when the module receives an erratic, irrational, or otherwise unusable signal from the sensor designated 'B' — present but dropping out or implausible rather than completely missing. Because the module is getting bad speed data, you may notice harsh or flaring shifts, no torque converter lockup, delayed engagement, or stalling when coming to a stop.
What are the most common causes of P2768?
The most common causes of P2768 are: Failing input/turbine speed sensor 'B', Intermittent wiring fault — chafed harness, broken wire, or damaged shielding on the sensor circuit, Corroded, loose, or fluid-contaminated connector at the transmission case pass-through, Low or contaminated transmission fluid, or metal debris on the sensor tip, Damaged reluctor/tone ring or excessive input shaft endplay giving an erratic signal, Failed transmission control module or its internal wiring. The specific cause varies by vehicle.
How much does it cost to fix P2768?
Repair costs for P2768 range from $500 to $2,200, depending on the vehicle and root cause.
Which vehicles are affected by P2768?
Au7o has documented P2768 across 1 vehicle models from 1 manufacturers: Mercedes-Benz.
Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.