what is best way to diagnose problem codesp0441,0170,0420,0430

Question

My kia is running all 4 codes drives down road fine, but will not start right up after putting gas in it. Nor will it stay running if I take gas cap off. Idle is getting rough and stalled on me at red light the other day the codes arep0170,0441,0420,0430.

Answer 1

Hi there,

P0170 indicates the fuel mix is too lean. Here is a list of possible causes.

P0170 KIA - Fuel Trim Bank 1 Too Rich Or Lean

Read more: https://www.autocodes.com/p0170_kia.html

P0441 indicates an issue with the evap emissions system. Here is a list of possible causes.

P0441 KIA - EVAP Emission System Incorrect Purge Flow

Read more: https://www.autocodes.com/p0441_kia.html

P0420 and P0430 indicate an issue with the catalyst converter on bank 1 and 2. Here is a list of possible causes.

P0430 KIA - Warm Up Catalyst Efficiency Below Threshold Bank 2

Read more: https://www.autocodes.com/p0430_kia.html