Has any one seen code p1123 rich fuel trim code?
I have a 2001 Accent with 40000 miles.

 

Not familiar with that code, sorry.

 

hey, i can help. first off, is p1123 the only code set?, if so, then start at the air inlet tube, checking for obstructions or leaking vacuum hose., if ok, then
inspect exhaust sytem for leaks, manifold, cat, muffler. inspect for faulty o2 sensors, if there ok, then
inspect evap canister purge control soleniod for operation, ability to HOLD a vacuum., if ok, then
inspect fuel pressure . if you have a fuel pressure tester, hook it up and measure fuel pressure with the engine running(49.8psi), if the pressure is too high, then replace fuel pump.
more than likely, either the front o2 sensor os dead, or the fuel pressure is too high. unfortunalty, you need a special hyundia adaptor to check fuel pressure, and if you have access toa scan tool for codes, hten you should be able to access some data stream, also.

let me know, im an ase technician that just so haapens to work in a hyundia dealership.

 

Just wondering if you got this resolved? My 2001 Accent is throwing the same code. I thought it was the EVAP solenoid, but it came back after replacing it. Justs wondered what you found on yours.

 

P1123 was my MAF.

 

yeah i got p1123 code too..and one of my headers bolt are gone or broken..