In older models (particularly the 2012 Mégane III with CVT gearboxes), DF357 was a indicating an internal mechanical failure or sensor fault within the automatic gearbox.
Faulty speed or pressure sensors within the transmission housing.
Inspect the harness connecting the wheel speed sensors to the main chassis loom. Look for brittle wiring caused by radiant brake heat. Clean the electrical pins with a dedicated contact cleaner and apply dielectric grease to prevent future moisture or heat-induced resistance anomalies. Conclusion renault df357 hot
The most common culprit is a worn-out or misaligned switch located above the brake pedal.
The core message is this: However, by understanding exactly what this error means, diagnosing the root cause, and following a structured troubleshooting path, you can save hundreds of dollars in unnecessary repairs. In older models (particularly the 2012 Mégane III
Old or contaminated fluid can lead to overheating and poor lubrication, triggering protection codes.
To understand the root cause, read the vehicle using a dedicated Renault diagnostic tool (like ). Look for these accompanying codes: Fault Code Technical Meaning Connection to DF357 DF047 Computer Supply Voltage Look for brittle wiring caused by radiant brake heat
In modern Renault models, the brake pedal sensor does not simply turn on the tail lights; it sends a digital data signal via the Controller Area Network (CAN bus) multiplex system to several computers simultaneously: : To cut fueling when braking.
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Solution: If the ring is cracked, replace it. Clean the area using a wire brush and brake cleaner before pressing a new ring into place to prevent sensor spacing issues. Step 3: Check and Test the Brake Pedal Switch
As mentioned above, the car's computer does not automatically adapt to a new battery.