A check engine light with code DTC P0421 was diagnosed on my car recently. It's a mitsubishi lancer, '06, 1.6 Petrol. the garage told me i needed to change the exhaust manifold.
Has anyone encountered this problem? I know its either the O2 sensors or the catalytic converter that needs to be replaced. I'm not seeing any problems with the performance of the car. I have an NCT coming up soon which will show me the emissions from the car. I'm not going to replace anything until I know something is failing on the car. Any help/suggestions welcome!
Has anyone encountered this problem? I know its either the O2 sensors or the catalytic converter that needs to be replaced. I'm not seeing any problems with the performance of the car. I have an NCT coming up soon which will show me the emissions from the car. I'm not going to replace anything until I know something is failing on the car. Any help/suggestions welcome!