Fuel injection for exhaust gas aftertreatment
Proceed as follows: Carry out the test "Checking fuel injection for exhaust gas aftertreatment" using SDP3. The test is stopped if the air and fuel pressure increases too much when the air control valve and fuel valve are closed.If the test is stopped: Remove the pipes between the air control valve and the fuel valve and fuel injector. Start the engine and check to see whether any of the valves is leaking.If any of the valves is leaking: Check the circuit connectors and electrical cables. If the connectors and electrical cables seem to be intact, renew the air control valve and fuel valve.When the fault has been rectified the fault code can be deactivated by carrying out "Checking fuel injection for exhaust gas aftertreatment" using SDP3.
What you'll see
No driver-visible symptom recorded.
System reaction
No system-reaction text recorded.
Diagnostic depth
The air and fuel pressure in the valve block for exhaust gas aftertreatment is too high when the air control valve and fuel valve are closed.
Air control valve or fuel valve leaking or cannot be closed.