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SJC8A00K77100090401FAAT30 − − − − − − − − DTC P0401: YES NO YES NO YES NO YES NO 11-328 EGR System DTC Troubleshooting EGR Insufficient Flow NOTE: Before you troubleshoot, record all freeze data 1. Turn the ignition switch ON (II). 2. Clear the DTC with the HDS. 3. Start the engine. Hold the engine speed at 3,000 rpm without load (in Park or neutral) until the 4. Do the EGR TEST in the INSPECTION MENU with the HDS. Go to step 5. Go to step 7. 5. Test-drive under these conditions: • Engine coolant temperature (ECT SENSOR 1) above 158 °F (70 °C) • Transmission in D position engine speed between 1,100 rpm and 3,000 rpm • During the drive, decelerate (with the throttle fully closed) for 5 seconds 6. Monitor the OBD STATUS for DTC P0401 in the DTCs MENU with the HDS. Remove the intake manifold cover (see step 1 on page 9-3), clean the intake manifold, and EGR If the screen indicates PASSED, intermittent failure, the system is OK at this time. If the screen 7. Turn the ignition switch OFF. 8. Replace the EGR valve (see page 11-342). 9. Turn the ignition switch ON (II). 10. Reset the PCM with the HDS. 11. Do the PCM idle learn procedure (see page 11-273). 12. Test-drive under these conditions: • Engine coolant temperature (ECT SENSOR 1) above 158 °F (70 °C) • Transmission in D position engine speed between 1,100 rpm and 3,000 rpm • During the drive, decelerate (with the throttle fully closed) for 5 seconds 13. Check for Temporary DTCs or DTCs with the HDS. Check for poor connections or loose terminals at the EGR valve and the PCM, then go to Go to step 14. 14. Monitor the OBD STATUS for DTC P0401 in the DTCs MENU with the HDS. Troubleshooting is complete. If any other Temporary DTCs or DTCs were indicated in step 13, If the screen indicates FAILED, check for poor connections or loose terminals at the EGR valve Is the r esult OK ? Does the scr een indicate F AILED? Is DT C P0401 indicated? Does the scr een indicate PASSED? |