شمعة تسخين مقصورة تُحمّل الوحدة زيادة

A glow plug shorted internally, drawing far more current than its driver can supply. The code names the module or its circuit, not the plug — which is the whole point of the entry, and the reason modules get replaced unnecessarily.

A shorted plug is a load fault presenting as a driver fault. The module either reports an over-current on that channel or its output stage fails, and a replacement module fitted to the same plug fails again. Measure each plug's resistance before fitting anything: a healthy plug reads well under two ohms and a shorted one near zero, so the outlier is obvious in minutes. Replace glow plugs as a set where one has failed, since the others are the same age and the next short takes the new module.