Renault Df357 Hot ~upd~ Jun 2026

If your Renault has triggered the fault code, this is not a sensor glitch you can ignore. It is a mechanical failure regarding the Lock-up Pulley (Converter Lock-up Clutch) . In layman’s terms, your torque converter is failing to engage or disengage properly, and the root cause is often that the lock-up friction material is disintegrating.