The difference between the desired boost pressure and the actual boost pressure is greater than 20 kPa (3 psi) for more than eight seconds.
Note: The diagnostic code indicates a mechanical problem. The ECM and the electronic control system are operating correctly.
System Response:
Boost pressure is set to 0 kPa (0 psi). "DIAG" will be displayed next to the status for "Boost Pressure" on the Caterpillar Electronic Technician (ET). The check engine lamp will illuminate.
The engine may experience low power when the diagnostic code is active.
Test Step 1.
The diagnostic code indicates a problem with the turbocharger, the wastegate, or a pinched turbocharger line. The diagnostic code does not indicate a problem with the ECM or the electronic control system.
Results:
- OK - STOP