Scania fault code 8391
Code 8391 is used by 2 different Scania systems. Choose the control unit shown in your diagnostic tool:
AMS
Electrically heated reductant hose (H25), short circuit to earth
The control unit for the exhaust gas aftertreatment management system indicates that the pins for the electrically heated reductant hose are short-circuited to earth.
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EEC Exhaust Emission Control
Reductant circuit
Fault in the reductant heater for reductant hose 1 (H25).
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