Communication with the NOx sensor after catalyst in the EEC system
Check the wiring and clean the connectors between the NOx sensor after catalyst and EEC system. If no fault is found, replace the NOx sensor after catalyst.For engines with NOx-control software, confirmation of repair requires:- Turn the ignition off- Turn the ignition on If the fault is remedied, the DTC should now be passive.
What you'll see
No driver-visible symptom recorded.
System reaction
None.For engines with NOx-control software, this DTC is classed as a type E failure.
Diagnostic depth
The control unit for the EEC system receives too many CAN NOx frames from the NOx sensor after catalyst, i.e. while reading one NOx frame another one is received or the CAN buss off bit is set.(Refer BOSCH SW-specification Y281S01334-VC0 for more details. Error path: ep06_s_def_ouw.6, cnox_s_def_ouc.1.)
Communication error between the control unit for the EEC system and NOx sensor after catalyst.