P0420 Catalyst system efficiency below threshold bank 1 error

[pwuser151902690497]

AOA...
Yaar maray pass Toyota Passo Hana kuch dino say P0420 Catalyst system efficiency below threshold bank 1error day rahi ha lakin jub battery k wires hata data hou 10 mint k laya pir khtam ho jata ha pir kuch time k bad pir ajata ha...jub ya error a raha houta ha us waqat eco mode b on nahi hota ha... kaya karna ho ga es k laya

[Hassan1991]

Wailaikum Assalam
There can be multiple reasons for this error.
Start the diagnosis with leaks in exhaust pipe then check the catalytic converter and o2 sensors.
Do you feel any difference in mileage?

[pwuser151902690497]

nahi 1300 cc pay AC k sat 20.5 data ha... our error b hota ha .esi tara local may b koi khas fark nahi hota AC k sat 13 ya 14 day raha hota ha suraf eco ki light off ho jati ha jub ya error ajata ha lakin aghar batter ki wire hata dou 10 mint k laya pir khtam ho jata ha

[pwuser151902690497]

wesay exhaust pipe may leaks kasay check karay gay,

[Hassan1991]

Exhaust leak visually check ho ga.
O2 sensors koe acha scanner test kary ga.
Last it can be a bad catalytic converter.

[pwuser151902690497]

kal rat ko may daka ha ghari ko nechaya say our leak test b kaya ha wo to ok ha lakin es may catalytic converter jo may nay google pay daka ha us jasa kuch b nahi ha.
1 capsule type ka unite laga ha chuta sa pir fuel tank say pehalay dousra capsule laga ha wo lamba sa ha our last may 1 bara sa jasay gas calendar ho ha 10 KG ka wesay kuch laga ha our pir Exhaust our laga ha

[Hassan1991]

Catalytic converter will be closest to engine, with o2 sensor before and after it.

[pwuser151902690497]

ok