[2] Monitoring of exhaust back pressure: The air mass is too large.

[2] Monitoring of exhaust back pressure: The air mass is too large.

Test 1: Important note:Before performing further work, check whether a diesel particulate filter was retrofitted.A clogged diesel particulate filter can cause this fault entry.

Test 2: List of possible tests

1. Important note:Before performing further work, check whether a diesel particulate filter was retrofitted.A clogged diesel particulate filter can cause this fault entry.

1. No further information available.


2. List of possible tests
Check actual value B60 (Exhaust back pressure sensor).
Test prerequisite

- Ignition ON
Status of relevant actual value:
- B60 (Exhaust back pressure sensor):Warning! Communication with ECU required.
Specified value

- With the ignition on, the value must not exceed +30 hPa or -30 hPa.
Question

- Are the read-out values OK?


YES
Actual values Fill level of diesel particulate filter
Test prerequisitesIgnition ON
- Ash content of diesel particulate filter:Warning! Communication with ECU required.

- Soot content of diesel particulate filter:Warning! Communication with ECU required.
Continue with button F2

NO
Important note: The sensor is ventilated by means of a bore underneath the plug.If the plug is disconnected and then plugged back in, an incorrect pressure value is briefly displayed.To ensure that the positive pressure is safely released, wait for approx. 3 min.

Check component B60 (Exhaust back pressure sensor).
Test prerequisite

- The engine is cold.(Coolant temperature < 60°C)
- After engine has run it must be switched off for at least 30 min.
- Ignition ON
Status of the relevant actual values:
- Coolant temperature:Warning! Communication with ECU required.
Continue with button F2