P042E

P042E-EXHAUST GAS RECIRCULATION CONTROL STUCK OPEN

For a complete wiring diagram refer to Diagrams/Electrical. Electrical Diagrams


Theory of Operation

The Engine Control Module (ECM) monitors the orifice temperature of the EGR valve and will set the fault if the temperature is above a calibrated threshold maximum value. The ECM will illuminate the MIL light immediately after the diagnostic runs and passes in four consecutive drive cycles.

- When Monitored:

This monitor runs when the vehicle speed is greater than 20 MPH and during a regeneration of the Aftertreatment Diesel Particulate Filter.

- Set Condition:

The EGR outlet temperature is over a calibrated amount for 30 seconds.





Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Pre-Diagnostic Troubleshooting Procedure

1. OTHER EGR VALVE DTCS PRESENT

NOTE: Before continuing with this test, it is recommended to review the vehicles repair history to avoid a duplicate repair of cleaning the EGR Valve Assembly. If the vehicle has recently had the EGR Valve cleaned due to this DTC being set (past 30 days or 1000 miles), replace the EGR Valve Assembly.

Ignition on, engine not running.

With the scan tool, read DTCs.

Are there any EGR circuit DTCs present?

Yes

- Repair the other EGR Valve DTCs before proceeding.

No

- Remove and clean the EGR Valve with Mopar EGR system cleaner.
- Go To 2

2. EGR VALVE

Ignition on, engine not running.

With the scan tool, erase DTC.

Perform the DIESEL AFTER TREATMENT VALIDATION - 6.7L Procedure.

Test drive the vehicle.

With the scan tool, read DTCs.

Did DTC P042E return?

Yes

- Replace the EGR Valve in accordance with the service information.
- Perform the DIESEL AFTER TREATMENT VALIDATION - 6.7L Procedure.

No

- Repair complete.