P2BAC

P2BAC-NOx EXCEEDANCE - DEACTIVATION OF EGR

For a complete wiring diagram, refer to the Wiring Information.

Theory of Operation

The Powertrain Control Module (PCM) continuously monitors the engine's fault code status to determine if any fault codes critical to successful engine operation are active. The PCM will illuminate the MIL Lamp immediately after the diagnostic runs and fails. The DTC will become inactive as soon as all active critical fault codes have been repaired.

- When Monitored:
Continuous with the engine running.

- Set Condition:
The PCM detects that certain critical fault codes related to engine operation are active.





Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Pre-Diagnostic Troubleshooting Procedure.
CHECK FOR ACTIVE DTCs
1. Turn the ignition on.
2. With the scan tool, View DTCs.

Is the DTC active?

Yes

- This is an information only DTC and indicates an engine power derate has been implemented. Repair all other active DTCs present and this DTC will become inactive.
- Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Powertrain Verification Test.

No

- Perform the INTERMITTENT CONDITION - 6.7L diagnostic procedure. Intermittent Condition Test