U0075

U0075-J1939 NETWORK #2 - INTERMITTENT

Theory of Operation

The monitor for this error detects disturbances on the J1939 Data Link which contains the following nodes: VG Turbocharger, O2 Sensor Module and the Powertrain Control Module (PCM). When the PCM detects a significant number of data link disturbances are present on the J1939 Data Link, the PCM software will temporarily disable the data link and restart it to try and re-establish a good data link. This monitor exists to notify the technician that this type of event occurred. It may, or may not indicate that there is a problem with the data link.

- When Monitored:
Continuously with the ignition on.

- Set Condition:
The Powertrain Control Module (PCM) detects disturbances on the J1939 Data Link directly related to the VG Turbocharger and the O2 Sensor Module.





Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Pre-Diagnostic Troubleshooting Procedure.
ACTIVE DTCS
1. Ignition on, engine not running.
2. With a scan tool, read DTCs.

Are the U010C or U011A DTCs active along with this DTC?

Yes

- Perform the diagnostics for those DTCs.

No

- With a scan tool, Erase the DTC. Check for evidence of tampering or unapproved software.
- Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Powertrain Verification Test.