Boost pressure sensor (T122)
Check the wiring and connector to the boost pressure sensor (T122) Check / replace the boost pressure sensor (T122) EUV: If the running time, since the error code was generated exceeds 10 hours, drain the EGR cooler. There is a risk of condensation in the air-cooled EGR cooler when EGR is turned off. Empty the EGR cooler as described in the Workshop Manual, Section 01-65.
What you'll see
No driver-visible symptom recorded.
System reaction
The error affects the engine emissions of nitrogen oxides. Depending on the emission class can torque reduction, and warnings lamp be activated.
Diagnostic depth
EMS S8 indicates an short circuit to battery on the pins connected to the boost pressure sensor (T122)
- Connectors / wiring to boost pressure sensor (T122) - Faulty component (T122)