System Too Lean - P0171 (FUEL CONSUMPTION ISSUES)

[Xulfiqar]

The brake circuits in toyotas have been X split since the 70s. Meaning front right and rear left are one circuit, front left and rear right are one.

Its done to prevent total brake failure in case of leak. Also make sure to flush brake fluid out every 1 or 2 years to keep the system working perfectly.

Btw, we use our ears to listen to booster leak

[ahmedstudio]

"Btw, we use our ears to listen to booster leak"?

[Xulfiqar]

Front mounting flange and pushrod area inside cabin.

[ahmedstudio]

@Xulfiqar

Ok, Can this leak in brake booster also affect fuel consumption, lean condition?

Brake booster front mounting flange is the marked rea in photo? It is , then what to do to fix leak there?

[ahmedstudio]

I check her, both are alright but yes there's a leak I don't know where

[ahmedstudio]

Can this leak in brake booster also affect fuel consumption, lean condition?

Brake booster front mounting flange is the marked rea in photo? It is , then what to do to fix leak there?

@Xulfiqar please see this

[Xulfiqar]

If you have a vacuum leak there, replace the brake booster, the pushrod seal has let go

Also change the master cylinder as its rear seal has leaked

[pwuser160181154898]

I have been searching Google and YouTube for p0171 code and did everything except thorough exhaust leak check.
My car is Nissan dayz 2014.
Checked leak in vacuum through water.
Replaced fulepump and filter.
Replaced maf, map and upstream o2 sensor.
Still no change. Still I'm getting p0171 code.
History:
I did cat clean from catclean at share Faisal. Since then I'm getting this code. I tried everything. I'm based in Karachi can someone recommend anyone or a possible solution.
Thanks

[ahmedstudio]

Make sure:

1) Air cleaner assembly is seated properly.

2) Gasket rings for MAF, Throttle body are installed.

3) Check for vaccum leak in brake booster.

[pwuser160181154898]

I think Its a very minor leak couldn't find a specialist who can check thoroughly. Can you recommend anyone in Karachi?

[pwuser160181154898]

Assembly seated properly checked. I have changed maf and throttle body placed perfectly. Hoses/pipes looks fine to me.

[ahmedstudio]

In Karachi go to Jamil Autos
@capsat can guide about the location/area

[ahmedstudio]

Any brake service done recently?

[farrukhjamil789]

No

[farrukhjamil789]

Please guide me the location.

[farrukhjamil789]

Front tyres changed and Alignment done.

[capsat]

0300 923 2821 Jamil Autos Irshad Ahmed 0300 223 7538 Khudadad Colony Society Office junction

[farrukhjamil789]

hes saying if you have done everything you need to replace CAT then.

[ahmedstudio]

Get the cat con cleaned if its choked. I was facing the excessive fuel consumption (11 km/l), I got the cat con cleaned and fuel consumption has restored to 15km/l in city drive, 17 km/l ok highway. Vehicle is 1300 CC

[pwuser155913790095]

how u got it.cleaned which methoud he used?