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Motor (P)
The supply voltage measured at injector group A is below the calibrated threshold. Either the supply is shorte…
The injector group A supply voltage exceeds the calibrated upper limit. Often a sign of a short to battery vol…
The ECU detects an open or missing supply voltage on injector group B. The injectors on this bank cannot be en…
The temperature sensor at the SCR inlet reports a value above the safe limit. The SCR catalyst loses NH3 stora…
Specifically during DPF regeneration, the SCR inlet temperature exceeded the safe limit — typically because to…
DEF pump A current draw exceeds the upper threshold — typically a seized pump head or partial winding short.…
DEF heater A current draw exceeds the upper threshold — typically a partial short in the heating element.…
The supply rail to fuel injector group B is below the lower threshold — fuse, relay, or supply harness fault.…
Supply rail to injector group B above the upper threshold — typically a stuck-closed regulator or alternator o…
Supply rail to injector group C is open — group C will not fire. A flow-deviating injector throws off cylinder…
A general electrical fault is reported on vehicle speed sensor B — second VSS used either at the transmission …
The signal of the secondary vehicle speed sensor is implausible compared to other sensors. The ECU cannot use …
The vehicle speed signal computed from VSS does not match the wheel-speed signal from ABS within tolerance. On…
VSS does not match transmission output-shaft speed within tolerance. Possible transmission slip, sensor fault,…
Transmission output-shaft speed does not match ABS wheel speed within tolerance — typically transmission slip,…
The DEF (urea) pump A keeps running when commanded off, or its drive current does not drop to zero. Continuous…
DEF heater D current draw is below threshold — typically a partially-open winding.…