Do not ignore this fault. While the standard hydraulic brakes will still stop the car, the ABS, Emergency Brake Assist, and Electronic Stability Control (ESP) are disabled, increasing the risk of skidding or loss of control in emergency maneuvers.

The variable geometry actuator is sensitive to carbon build-up. If the truck does a lot of city driving (stop-start), the vanes in the turbo stick. This triggers an engine derate (limp mode). A forced regeneration of the DPF (Diesel Particulate Filter) often frees it up, but stubborn cases require turbo removal for cleaning.

Renault released specific fixes (such as OTS 0B07 and 0B17) which may include reprogramming the injection computer with new software to adjust fault thresholds.

Even if your compressor is perfectly fine, the ECU will refuse to send power to it as a safety measure.

: The most common culprit is a faulty regulator that cannot maintain the required pressure levels.