P0401 - Exhaust Gas Recirculation Flow Insufficient Detected
P0139 - O2 Sensor Circuit Slow Response (Bank 1 Sensor 2)
P0140 - O2 Sensor Circuit No Activity Detected (Bank 1 Sensor 2)
Короче, перевожу: 0401 - Недостаточная рециркуляция выхлопных газов, 0139 - Медленный отклик датчика кислорода 2 (банк 1), 0140 - Нет активности выходного сигнала датчика кислорода 2 (банк 1).
Диагностика рулит!:rtfm:
Телепаты сообщают:
Causes
A code P0401 most likely means one or more of the following has happened:
- The DPFE (differential pressure feedback EGR) sensor is faulty and needs to be replaced
- There is a blockage in the EGR (tube), most likely carbon buildup
- The EGR valve is faulty
- The EGR valve may not be opening due to a lack of vaccuum
Possible Solutions
In fixing this code, it is quite common for people to just replace the EGR valve only to have the OBD code return. The EGR valve is not always the culprit.
- Use a vacuum pump and pull the EGR valve open while monitoring engine RPM's & DPFE voltage. There should be a noticable difference in RPM's with the EGR open
- Clean out the EGR valve and/or tubing to remove deposits
- Check the voltage at the DPFE, compare to specified values (refer to a repair manual for your specific model)
- Replace the DPFE sensor (with a good quality / OEM one)
- Replace the EGR valve
Короче, копать в сторону клапана EGR. И проверить провода и разъем лямбды. А, для начала, я бы стер ошибки путем скидывания клеммы с аккумулятора и посмотрел, вернутся ли они.
