In some specific cases, particularly with the 1.5 dCi engines, a failing fuel injector can cause misfires or irregular combustion. If the engine is misfiring slightly, the torque output drops momentarily, confusing the ECU and triggering the "Invalid Torque Signal."
Replaced the turbocharger ($1,100) – Code returned after 80 miles. mot 1654 renault
$3 (silicone hose) + $80 diagnostic. Lesson: Always start with vacuum lines. In some specific cases, particularly with the 1