EGR actuator (egrAct), SCB on low side or OL or SCG on high side
▶ How to fix
Check the actuator, connectors and wiring. Measure the resistance in the EGR actuator. It shall be around 30 Ohm at 20º C. To confirm a correct repair run the engine to above 60 degrees and make sure air pressure in supply is higher than 7 bar. Then let the engine idle for 10 sec. The DTC should now be passive if the fault is correctly repaired.
What you'll see
No driver-visible symptom recorded.
System reaction
No adaptation of the inlet air mass flow sensor will occur.
Diagnostic depth
Detection
Short circuit low to battery voltage (U30), open load or short circuit high to ground (U31) in the EGR actuator (egrAct) circuit.
Possible cause
The actuator connectors or cables are damaged or disconnected.