I have a 2003 hyndi accent it has a p1404 code what is it

P1404 is an EGR code for this application! (P1404 EGR Valve Closed Position Performance). You should clean the EGR valve and then there is a procedure to reset the learned voltage value, it may be alright but it has to relearn the voltage! To do this : The code sets if the PCM sees voltage that is more than 0.29 volts above the learned minimum. The engine needs to be RUNNING when the DTC is cleared. Clearing the DTC also triggers the closed EGR minimum voltage relearn. If you clear the DTC with the key on, engine off, the voltage may be high enough when the engine is running to trigger the code again.

P1404 is EGR valve stuck open. Probably need to replace your electric EGR valve. First, I would remove it and clean the carbon out of it before replacing this expensive part.

You have an O2 Sensor Code & a couple of EGR
Codes

I would guess the EGR issues are setting the O2 Code

P0404....Exhaust Gas Recirculation Control Circuit Range/Performance

the P1404 code doesnt exist in the kia data codes but this one is in the generic codes and if its correct its showing a fault with the EGR valve but i would take it to a kia garage if you have been able to read the codes correctly

a professional chilton or motor manual would have the code translations. some code readers will translate codes automatically.

P1529- TCM MIL request signal failure
P1404- DTML Heater circuit failure
P0722- ATM Output speed sensor no signal

All these together indicate a possibly cut wiring harness failure, or other major circuit issue.

the purge valve i believe is located near your gas tank unless theyve moved it i should look like a little canister cyclinder shaped. both codes could be set off by the same problem. try replacing the valve.

most likely there is a piston ring problem, this will require the engine to be torn down and repaired.

P2096
Signal Delay Time for Oxygen Sensor Ageing Limit
Diagnosis conditions
• Oxygen sensing after TWC is active
• No secondary air
• No diagnosis of secondary air system
• EVAP canister not highly loaded
• No faults in memory
Possible fault cause
♦ Oxygen sensor