Answers
May 29, 2023 - 11:40 PM
If you have replaced the EGR valve on your 2010 Dodge Grand Caravan SXT 6 Cyl 3.8L and the check engine light has come back on with the same P0403 code and a secondary code of P0406 (EGR position sensor circuit high), you can take the following steps to investigate the problem:
1) Check that the electrical connections to the EGR valve and the EGR position sensor are secure and free from corrosion or damage. Check the wiring harness for any signs of damage or loose connections.
2) Check the vacuum lines connected to the EGR valve and the EGR control solenoid. Ensure they are not cracked, disconnected, or blocked, as vacuum leaks or restrictions can cause EGR system issues.
3) Over time, carbon buildup can accumulate in the EGR passages, affecting the performance of the EGR system. You can try cleaning the EGR passages using a specialized EGR cleaner or, if necessary, have a professional clean or replace the passages.
4) The P0406 code indicates a high voltage reading. You may need to test the EGR position sensor using a multimeter to check for proper voltage signals. If the sensor is faulty, it may need to be replaced.
5) Check EGR control solenoid, It is responsible for controlling the EGR valve's operation. Ensure the solenoid is functioning correctly, receiving proper voltage, and opening/closing as commanded. Replace if necessary.
If you have performed these steps and the issue persists, it would be recommended to have a professional diagnostic performed by a qualified mechanic. They will have access to specialized tools and equipment to further diagnose the problem and determine the exact cause of the recurring P0403 and P0406 codes.
You may need some parts in the process, click this link to be directed to our website where your vehicle information has already been entered. Simply enter the part's name into the search field to get started.
We hope this helps. Have a nice day!
1) Check that the electrical connections to the EGR valve and the EGR position sensor are secure and free from corrosion or damage. Check the wiring harness for any signs of damage or loose connections.
2) Check the vacuum lines connected to the EGR valve and the EGR control solenoid. Ensure they are not cracked, disconnected, or blocked, as vacuum leaks or restrictions can cause EGR system issues.
3) Over time, carbon buildup can accumulate in the EGR passages, affecting the performance of the EGR system. You can try cleaning the EGR passages using a specialized EGR cleaner or, if necessary, have a professional clean or replace the passages.
4) The P0406 code indicates a high voltage reading. You may need to test the EGR position sensor using a multimeter to check for proper voltage signals. If the sensor is faulty, it may need to be replaced.
5) Check EGR control solenoid, It is responsible for controlling the EGR valve's operation. Ensure the solenoid is functioning correctly, receiving proper voltage, and opening/closing as commanded. Replace if necessary.
If you have performed these steps and the issue persists, it would be recommended to have a professional diagnostic performed by a qualified mechanic. They will have access to specialized tools and equipment to further diagnose the problem and determine the exact cause of the recurring P0403 and P0406 codes.
You may need some parts in the process, click this link to be directed to our website where your vehicle information has already been entered. Simply enter the part's name into the search field to get started.
We hope this helps. Have a nice day!
Jun 10, 2023 - 10:32 PM
If you have replaced the EGR valve on your 2010 Dodge Grand Caravan SXT 6 Cyl 3.8L and the check engine light has come back on with the same P0403 code and a secondary code of P0406 (EGR position sensor circuit high), you can take the following steps to investigate the problem:
1) Check that the electrical connections to the EGR valve and the EGR position sensor are secure and free from corrosion or damage. Check the wiring harness for any signs of damage or loose connections.
2) Check the vacuum lines connected to the EGR valve and the EGR control solenoid. Ensure they are not cracked, disconnected, or blocked, as vacuum leaks or restrictions can cause EGR system issues.
3) Over time, carbon buildup can accumulate in the EGR passages, affecting the performance of the EGR system. You can try cleaning the EGR passages using a specialized EGR cleaner or, if necessary, have a professional clean or replace the passages.
4) The P0406 code indicates a high voltage reading. You may need to test the EGR position sensor using a multimeter to check for proper voltage signals. If the sensor is faulty, it may need to be replaced.
5) Check EGR control solenoid, It is responsible for controlling the EGR valve's operation. Ensure the solenoid is functioning correctly, receiving proper voltage, and opening/closing as commanded. Replace if necessary.
If you have performed these steps and the issue persists, it would be recommended to have a professional diagnostic performed by a qualified mechanic. They will have access to specialized tools and equipment to further diagnose the problem and determine the exact cause of the recurring P0403 and P0406 codes.
1) Check that the electrical connections to the EGR valve and the EGR position sensor are secure and free from corrosion or damage. Check the wiring harness for any signs of damage or loose connections.
2) Check the vacuum lines connected to the EGR valve and the EGR control solenoid. Ensure they are not cracked, disconnected, or blocked, as vacuum leaks or restrictions can cause EGR system issues.
3) Over time, carbon buildup can accumulate in the EGR passages, affecting the performance of the EGR system. You can try cleaning the EGR passages using a specialized EGR cleaner or, if necessary, have a professional clean or replace the passages.
4) The P0406 code indicates a high voltage reading. You may need to test the EGR position sensor using a multimeter to check for proper voltage signals. If the sensor is faulty, it may need to be replaced.
5) Check EGR control solenoid, It is responsible for controlling the EGR valve's operation. Ensure the solenoid is functioning correctly, receiving proper voltage, and opening/closing as commanded. Replace if necessary.
If you have performed these steps and the issue persists, it would be recommended to have a professional diagnostic performed by a qualified mechanic. They will have access to specialized tools and equipment to further diagnose the problem and determine the exact cause of the recurring P0403 and P0406 codes.
Sep 28, 2023 - 09:25 PM
The EGR passages may be cloged. Take the EGR valve back off and run a drill bit or close hanger in to the passeges then start it with the EGR on the vehicle.you may have to do it a few times. Then get some EGR cleaner and spray in the passages and let soak. And do the same thing till the passages are clean. Then put it back together and see what happens. I had to do that before on a few s10s.
Source: Experience
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