How he reset ecu after battery replacement

[muhammadumar10]

I have Passo 2007, few days ago I replaced battery , but after replacement fuel consumption increases, also driver side auto window key not working, no engine check lit,
Kindly guide me how to reset the ECU?????

[Xulfiqar]

your car keep alive memory (KAM) has been reset, you need to wait for the emmissions drivecycle to complete so the fuel consumption can recalibrate itself.

for the auto window - roll it up fully and hold the button for 5 seconds like that, the auto function will be learned after this.

btw - any decent workshop can replace your battery without disconnecting power to the car, if you choose to visit to a cheapo battery shop, they will disconnect the terminals without backup power and make the car lose all memory settings.

[muhammadumar10]

Thanks Bhai, window problem solved, actually I replace the battery myself,
Now what should I do ??? Wait or to visit some electrician, or any other manual method to reset

[muhammadumar10]

Is it necessary to reset the ECU now ????

[Xulfiqar]

No, just drive, it will relearn the fuel trim adjustment values in about 200 kms

[muhammadumar10]

During learn period , should I drive with hard foot or with soft foot to increase fuel avg in future ( means after learn period , will my this habit save in ECU permanently) ?????

[Xulfiqar]

Is this your first ever car ownership experience?

There is no such thing as heavy or soft foot learning, the ecu will learn the trim values by measuring air volume, exhaust condition etc to set a baseline and keep on finely adjusting it to an incredibly long scale.

[muhammadumar10]

Yes Bhai this is my 1st experience.. And jazak Allah. One thing more plz,car acceleration is not constant, sometimes acceleration is very fast and sometimes very lazy, car chalti chalti khud hi tez ho jati ha.
Any sensor is malfunctioning or something else??