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I have noticed that its only the RANGE and AVERAGE FE that gets reset after a battery disconnect whereas the TRIP A & B remain the unchanged.
Adulterated fuel could be a possible reason but 1000 kms with Average FE displayed at 11.8KMPL would require at least 3 tank fills (Considering the Range in city between 350-400KMS) with such low FE.

Like I mentioned above, the Average FE doesn't depend on the Trip meter & the fact that the Trip meter doesn't reset on Battery disconnect.

Even my MID shows a meagre 14.1 kmpl after 1200 kms of driving. Will be giving for its first service on monday.

The average FE on the MID depends on the way the car is driven. If it is pedal to metal then low figures within a short period of time but if driven sedately the figures will climb.

My dad's Ertiga is giving an average of 16-17 kmpl every full tank. It takes the car 400-500 kms to get to a stable reading. The initial fluctuation is high depending on the throttle input.

Anurag.

Could it be lower also because I forgot to reset the avg FE meter after the last tank full?

Yes, it is possible if the FE is not reset after every full tank the readings obtained will have the previous "tank's" data too.

Check once after the service is completed. All the best.

Anurag.

The MID was reset at the service center. It showed 5kmpl only after some 30-40kms of driving. It was only after crossing 100kms, the MID displayed 7kmpl. The MID has shown an increase of ~ 4kmpl after driving for 1000kms.

That means in order to increase the mileage you need to burn more diesel! lol:
[list]
A large portion of 1000kms was city driving. That can be the reason for slow increase of the FE. But! the question remains the same- how could the resetting of MID relate to low FE?? The same engine which gave a FE of 15kmpl suddenly goes down to 11kmpl?
The air pressure is checked weekly at a reputed filling station.

The roughness in the first gear came up only after the 2nd service. It was all good until the car went for the service.
Its Delhi and its hot as hell in here.

The filling pump is reliable and that cannot be the case. Recently the fuel neck (the one starting from fuel cap to the tank was changed). The Fuel level was same as before.

Yes, only the average FE was reset. All the other parameter such as tripmeter and range remained the same

When is the fourth service supposed to be done for the petrol Ertiga?
Also, my car unfortunately leaked its engine oil a while ago which was replaced promptly with fully synthetic oil. For the next service, should I get the engine oil changed anyway?

This is exactly what I faced and my Ertiga ZDi problem came to light. My colleague from work also faced the same issue with his Ertiga VDi , but it was resolved quickly at his MASS.

Do please read my previous posts on the same issue.
My question here is, does 'checking and clearing' the DTC ( Diagnostic Trouble Codes ) solves the problem ?
My colleague had the same problem with his car while on a holiday with his family. He rang me. A local technician (Not Maruti personnel though) could fix it temporarily,and after he came back,he took his car to MASS,and they could fix it,but did not give any satisfactory answer to what went wrong and will it recur again.Surprisingly, ti hasn't till date. So did they actually,change the code only ? Did they change the turbo assembly or only the boost pressure solenoid ? If the problem is still there,why changing the codes will rectify the problem ?
I had the same problem recurring again and again and again for 2 months ( read my previous posts on this kindly ). But afater repeated change of hardware,they could get to know that changing the codes were not done,after changing the hardware,and thus problem was recurring.They changed the code,and problem was solved.

Only problem remained till date was mileage on MID. Previous high figures were never reached till date. My car shows 15.7 whether I drive in very heavy traffic at prime time in Kolkata or even after a 1000 Kms drive on highway with family ( avg speed 110-1120 Kmph ).

I know not everything can be attributed to a damaged turbo hose but by any chance, has the car been under performing - Any reduced pick-up or excessive smoke?

Btw, since a year I've been using Android apps to track cars FE & other car related expenses. Try them, I guess there must be many such apps now. Android : FuelLog, aCar or iOS : FuelLog3
(Ofcourse the disclaimer : no way related commercially, don't know developers.)

The car is performing as good as it was before the service. No performance issues. I will try to monitor the FE through the app.

The issue with my Ertiga VDi, showing the same symptoms like a few people have reported (sudden loss of power; jerks in between during acceleration; very very low mileage on the MID even after decent driving in highways)

The issue has been identified as a faulty solenoid. The solenoid tat controls the EGR valve and the Turbo wastegate actuation. It is located right above the front right shock absorber mount inside the bonnet.

The error code shown in the diagnostic tool is P0402. As per the technical service manuals provided by MSIL, this error is associated with EGR valve not closing once it opens, the turbo wastegate getting stuck at any position etc. Once this solenoid was replaced, my ertiga which gave an avg of 15.5 to 16.0 in all highway conditions climbed to a good 18.4 in combined 4 lane and 2 lane conditions. This avg figure stayed at 17.1 when i drove through the Ghat section from Schencottah to Kollam.

This has been a major solenoid fault giving me a loss of mileage due to the allowing of Exhaust gas into my inlet manifold always.

My vehicle usually has a change in the avg FE figures by 0.1kmpl only if driven consistently over 25 kms in highway conditions. Now its varying in very low stints and am happy about the same.

After the change of the faulty solenoid, I have driven 1380 kms and there is considerable incerase in the mileage and no symptoms of turbo boost pressure loss. :)

Just wanted to know what would happen if diesel Ertiga is kept idle(unused) for a couple of months. My requirement is such that i might have to keep the vehicle idle for a couple of months. Due to this i am not able to decide whether to go for the diesel version or the petrol version. I have heard that the diesel vehicle shouldnt be kept idle for long time. Is it true ? Has any diesel ertiga owner experienced anything with related to this ?

You can but is it that no one could start the engine for a while when you are not around than leaving it dead idle?

Couple of month should not be any much problem.

Anurag

Maruti Suzuki has rolled out a Limited Edition variant of the Ertiga to celebrate the sale of 1,50,000 units of the car in the Indian market. The Limited Edition will be available in petrol, diesel and CNG variants at the company's dealerships across the country.

Link to Team-BHP News Article

They have also launched a "football edition" . This is probably the first time I am seeing two limited editions being sold simlutaneously.

Dealers still very much stock the football edition in chennai.