Author L small course " graph article is achieved formerly "
Origin L great mind builds a truck
A lot of cars advocate the personnel that maintenance has contacted before including knows, car if breakdown lamp shined to need to repair a factory to undertake diagnostic, maintaining finished level also is barrier lamp extinguishs reason normally, car returns to normal.
But since occurrence aftertreatment breakdown, station of a lot of maintenance appeared such problem: Had solved when breakdown when, the aftertreatment breakdown lamp above car is eternal, can cause a car at this moment advocate people interrogative, is this breakdown solved after all? Actually here involved the monitoring of an item OBD that we must say.
The action of OBDDetect discharge engine when relevant breakdown, OBD system is diagnosed with MIL lamp service (Service) the lamp calls the police to the driver breakdown car can in time get remindful, reduce car to discharge, OBD system conduces to technician be being diagnosed quickly, repair to disease, reduce maintenance cost.
After understanding finishs OBD to diagnose a system, we define with respect to need after why can after some breakdown lamps are being maintained, wanting one day or some breakdown lamps are not eliminated, after shining because of breakdown lamp, even if your breakdown had been solved entirely, but need is eliminated in the ability below certain condition, this is we discharge what set inside code.
Cannot keep clear of code
Discharge when NOx when exceeding bid, want memory to cannot keep clear of code, this code wants to store 400 days or 9600 engine run a hour.
The directive is following at the same time bring about arrange the matter that exceeds bid:
? 1, urea is spent
? 2, reaction agent (urea) ration is interrupted to makings movement
? 3, reaction agent (urea) quality is poor
? 4, reaction agent (urea) wastage is too low
? 5, tall NOx is discharged, the reason is unidentified
MIL is bright:
? Discharge exceed OBD to be restricted to be worth
? Breakdown of the system that monitor
? Lack reaction reagent
? Engine electrify but when starting
MIL goes out:
? Discharge did not exceed
? 3 drive circulate or after 24 hours
? Add enough reaction reagent
? After engine is started
After everybody sees a few above, sum up to everybody, and having a few trouble cannot eliminate:
Lamp of ① car breakdown signs up for " exceed 5 to exceed 7 " hind, even if later breakdown was solved entirely, malfunction code is put in the ability after needing 9600 hours to be clear about as before. Some model need check through surmounting or 3 drive to just can extinguish breakdown lamp circularly, not was to solve fault fault lamp to be able to go out!
② car urea was done not have, do not add urea to continue as before travel time provides time more than, lamp of the breakdown after adding urea shows as before.
4 car add ③ inchoate country a lukewarm sensor is cogged the car of contact, won't have inside period of time show, but normally 3 arrive after 6 months, car can sign up for urea wastage to cross low fault, this breakdown cannot be eliminated likewise, even if car discharges lukewarm sensor,cogged connect take out burns urea normally, breakdown lamp often shines as before.
④ car uses inferior urea for long to be able to bring about car to check quality difference, chang Liang of same breakdown lantern show cannot be eliminated.
If encounter above trouble when, the method that wants to extinguish breakdown lamp brushs computer board afresh only, very may much person is reasonable here why experienced worker can give a car advocate after saying to hitting car flameout to take a taxi 3 times again again dispatch a vehicle, whether are such breakdown it is OK to had been solved as clear as day?
Those who need an attention is, this kind of method that allows breakdown lamp to go out quickly also applies to one part only on the aftertreatment of own system;
Difficulty is solved interactive
Call to us when the client say, lamp of car aftertreatment breakdown shined, newspaper tail gas is slight exceed bid (exceed 5) breakdown, what urea uses up is particularly much still, how can be you solved?
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