I got a P0421 code on my 2011 mitsubishi galant FE

Question

I got this code on my car.it is the only code..does that mean i need to change my converter or can it be a 02 sensor...If it is my converter do you know of any websites i can order from

Answer 1

HI there,

Most of the time this code does appear because of the converter. You can check for other causes such as intake manifold or exhaust manifold leaks, bad fuel pressure or a poorly running engine. All can cause this code.

P0431 MITSUBISHI - Warm Up Catalyst Efficiency Below Threshold- Cylinders 2-3

Read more: https://www.autocodes.com/p0431_mitsubishi.html