The DF357 was beloved for one reason: Simplicity . It is a cast-iron lump with a mechanical injection pump. No complex ECUs, no DPF filters, no EGR valves (on early models). It is the diesel equivalent of an AK-47.
If the thermostat is stuck closed, the engine will physically overheat rapidly. This would trigger DF357 as a legitimate warning that the coolant temp is too high.
The DF357 was beloved for one reason: Simplicity . It is a cast-iron lump with a mechanical injection pump. No complex ECUs, no DPF filters, no EGR valves (on early models). It is the diesel equivalent of an AK-47.
If the thermostat is stuck closed, the engine will physically overheat rapidly. This would trigger DF357 as a legitimate warning that the coolant temp is too high. renault df357 hot
