P0489

P0489-EGR CONTROL CIRCUIT LOW





For a complete wiring diagram refer to the Wiring Information Electrical Diagrams.

Theory of Operation

When the Exhaust Gas Recirculation (EGR) valve is opening to a position, and uses too much current to achieve that position the diagnostic will fail. Also at every key on, the EGR valve tries to recalibrate it's position. The valve shaft will move until it comes into contact with the valve. If the distance the valve shaft must move is different by a calibrated amount than the original learned movement then the diagnostic fails. The valve will perform this autozero function at every key on and every time the valve is commanded closed throughout the engine operating cycle. The Engine Control Module (ECM) will illuminate the MIL lamp after the diagnostic runs and fails in two consecutive drive cycles. The ECM will also turn on the ETC lamp. During this time the ECM will no longer control the EGR valve. The MIL lamp will turn off once the diagnostic runs and passes in 4 consecutive drive cycles.

- When Monitored:
At key on, while engine running.

- Set Condition:
Motor effort exceeds a calibrated level or auto zero function fails.





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

1. ACTIVE DTC
1. Ignition on, engine not running.
2. With the scan tool, read DTC's.

Is DTC P0489 active?

Yes

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

No

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

2. EGR VALVE
1. Ignition on, engine not running.
2. With the scan tool, erase DTC.
3. Test drive the vehicle and perform a mobile desoot.
4. With the scan tool, read DTCs.

Is DTC P0489 active?

Yes

- Replace the EGR Valve.
- Perform POWERTRAIN VERIFICATION TEST - 6.7L. Powertrain Verification Test.

No

- Repair complete.
- Perform POWERTRAIN VERIFICATION TEST - 6.7L. Powertrain Verification Test.