某一天, 我心愛的 Mondeo ST-Line EcoBlue AWD 覺得日子過得太無趣, 決定亮燈給我看...
One day, my loved Mondeo ST-Line EcoBlue AWD decided that the days are too boring, so it turns on the check engine sign...
|Gentlemen, check your engine|
(The AdBlue signal is due to a low AdBlue level, not related to the issue)
Scan the car with FORScan Lite, DTC P02EC is presented.
(如何使用FORScan Lite 掃描故障碼)
Man, This is a FORD. DTC is absolutely normal, there is no reason to panic. Clear the DTC and the car is happy again, for just another 30km, and here it goes again. This time P049B joined the game.
P049B: EGR B 流量不足
排氣有點臭臭的, 看到燈亮著心情很不美麗, 另外日常用車加速, 換檔頓挫等尚無明顯感受.
As my car is still under warranty, I have the car back to the dealer and when they checked the only DTC that exist is P02EC. After the dealer checked my screenshot, they decide to reset the EGR and MAF first, as well as they are going to order a MAF for me as they don't have stock at the moment. I've been asked to drive my car again to see if the Check Engine signal comes back...
About another 35km, here we go again...
This time, the MAF has been replaced.
The label of the package showed it's a DA, but the part is just as what I have is a DB.
換好以後, 很開心地跑了兩百多公里, 又來了~
About another 200km, here we go again...
After some investigation, it shall be the EGR-A (Low pressure) filter is blocked.
(EcoBlue EGR系統概略請參閱 這裡 )
照片中下方手持軍規手電筒往上照射, 可以看到濾網已經差不多堵滿了, 現場技師使用剎車清潔劑輕輕噴過加風乾後, 濾網恢復乾淨
Under the filter is a decent flashlight. You may notice the filter is almost blocked. The technician used brake cleaner with pressured air to remove all the dust from the filter.
|清潔過後的 EGR-A 濾網|
Filter after the cleaning process.
The EGR radiator is quite dirty as well...
EGR Radiator before cleaning
依照ETIS手冊, 可用商用噴水設備噴灑500cc的蒸餾水洗淨, 發動後約幾分鐘水就會蒸發排出
ETIS Cleaning process.
ETIS Cleaning process
This dealer doesn't have distilled water on site, so they cleaned it with pressured air.
So we put everything back and reset MAF and EGR. I drove for around 300km, and both the Car and I are happy again. I also noticed that when the check engine is on, the car seems to be in semi-limp mode. The vibration is slightly bigger, the gap between gears is slightly longer, and the rev goes down a bit slower. After the filter has been cleaned, it is just like the car has just been serviced with new engine oil. Everything is silk-smooth now.
在台灣Mondeo ST-Line 群組中, 筆者的里程一萬九並不是最高的, 三四萬公里的大有人在, 而車友們卻沒有EGR濾網堵塞的狀況發生, 猜測最大的不同是筆者每天早上都從雙北蛋白區一路塞車去蛋黃區, 平均行駛速度實在是很低, 累積大量的EGR開啟轉速運轉時間(約1000~1400rpm), 進而造成堵塞, 當然也不能排除是不是有油品(燃油)的問題, 此點尚須累積更多資料後再驗證...
Among all the owners of this engine in Taiwan. I am not the one with the highest mileage (19xxxkm). There are owners with 30 or 40 k km out there without this issue. My assumption is that my daily drive is on most urban roads where no one can drive at the speed they like - it's slow and a lot of traffic all around. Most of the rev I usually use is between 1000-1400 rpm which is exactly the rev when EGR is working, which may cause the blockage of the filter. Of course, it can also come from a bad tank of diesel from a gas station, I need to collect more data for this to know what is the root cause of this.
SY Diagnostics dealing with this issue, some of the cars also have DTC P2394.
There are some rumors reported that, in Taiwan, all Volvo dealers put the cleaning process of the EGR filter as part of the regular service item. If anyone knows about this, please leave a message, thank you.