Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
EGR Monitor and Readiness Code
NOTE:
- During the procedure, do not turn the vehicle to the ACCESSORY mode or the OFF (LOCK) mode.
- All readiness codes are cleared when the 12 volt battery is disconnected, if DTCs have been cleared, or if the PCM is reset with the HDS.
Enable Criteria
ECT SENSOR 1 at 176°F (80°C) or more.
Procedure
1. Connect the HDS to the DLC .
2. Enter the maintenance mode, then start the engine .
3. Drive at a steady speed with the transmission in D at 50-62 mph (80-100 km/h) or above for more than 10 seconds.
4. With the transmission in D, decelerate from 62 mph (100 km/h) or above by completely releasing the throttle for at least 5 seconds. If the engine is stopped during this step, repeat steps 3 and 4.
5. Check the OBD status screen for DTC P0401 in the DTC's MENU with the HDS.
- If it is passed, the readiness code is complete.
- If it is not passed, go to step 3 and retest.
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.