Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Gauge For Transmission Oil Data
There is a gauge for transmission oil quality integrated into the software for the Transmission Control Module (TCM). This gauge calculates the time for which the oil exceeds a certain temperature during a certain period. When the gauge reaches the maximum value a diagnostic trouble code (DTC) for oil change is generated in the control module. When replacing transmission oil the gauge must be reset to zero to avoid generating a diagnostic trouble code (DTC) during incorrect conditions. This applies to changing transmission oil and when changing the oil with a repair.
The resetting function is activated via the vehicle communication input.
Use the Manual With the Right Hardware
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.