Compressed air pressure in the EEC system
Check the signals from the two air pressure sensors.See if there is any visible fault on the sensors, wiring or connectors.For engines with NOx-control software, confirmation of repair requires:- No air pressure after orifice sensor errror- No compressed air pressure sensor error- No compressed air valve errors- Previous afterrun complete- Turn the ignition on and off four times with 90 s in between or run the SCR invalidation test with SDP3 (takes approximately 30 minutes and needs to be run outdoors)If the fault is remedied, the DTC should now be passive
What you'll see
No driver-visible symptom recorded.
System reaction
The EEC system will not inject any urea, which leads to higher emissions.For engines with NOx-control software, this DTC is classed as a type D failure.
Diagnostic depth
During start up the air pressure sensor before and after orifice differs more than 0.31 bar, i.e. air sensors are not plausible.(Refer BOSCH SW-specification Y281S01334-VC0 for more details. Error path: ep02_s_def_ouw.14, sasp_s_def_ouc.7.)
The air pressure sensor before orifice might show wrong value.The air pressure sensor after orifice might show wrong value.