7355 código(s) en esta categoría. Página 165 de 307. Selecciona uno para ver el diagnóstico detallado.
Motor (P)
The DEF system air-assist pressure exceeds the upper threshold — pressure-control valve stuck closed or air pu…
Pressure in the AdBlue/DEF supply line is below the target. Usually a failing reductant pump, a clogged filter…
Manufacturer-specific variant of the reductant over-pressure condition. The pressure exceeds the upper thresho…
The control circuit to the reductant (DEF) dosing pump is open — no current flow detected. Without pump pressu…
A general electrical fault on the reductant tank heater "A" control circuit. AdBlue freezes at -11 C, so the t…
The reductant tank heater "A" does not heat when commanded on. Either a failed element or a stuck-off driver i…
The reductant tank heater "A" stays energised even when not commanded — usually a shorted driver stage. Contin…
The SCR catalyst on bank 1 is no longer reducing NOx to the level the ECU expects, even with proper reductant …
The SCR reductant injection valve does not deliver the commanded amount of reagent. Causes include clogging by…
A temperature sensor at the SCR catalyst on bank 2 reports a value above the safe limit — sustained over-tempe…
The SCR catalyst on bank 2 is no longer reducing NOx within the required efficiency — downstream NOx remains t…
The DEF consumption observed over the dosing window is below the model expectation — typically a clogged dosin…
The DEF consumption observed over the dosing window is above the model expectation — typically a leaking injec…
The DEF injection valve at bank 1 unit 1 does not close when commanded — DEF flows continuously into the SCR. …
The DEF injection valve at bank 2 unit 1 does not close when commanded — DEF flows continuously into the SCR. …
The IMRC actuator drive circuit on bank 1 is electrically OK but its current draw or duty-cycle response is ou…
The IMRC actuator drive circuit on bank 2 is electrically OK but its current draw or duty-cycle response is ou…
The control line driving DEF pump B is open. On large engines or dual-tank systems a second pump (B) supplemen…
DEF pump B receives a run command but does not start, or shuts off prematurely.…
DEF pump B control line stuck low — short to ground. Wiring faults of this kind typically come from chafing, w…
DEF pump B control line stuck high — short to B+. Wiring faults of this kind typically come from chafing, wate…
The first DEF metering unit (the integrated module that combines pump, filter, level sensor, and dosing valve)…