Question

P0125 HYUNDAI - have checked ect harness. falls in specs. replaced ect. Replaced thermostat. And coolant level is perfect. Also code p0171 shows up. I have done every thing imaginable except replaceing the ecu. Could that be the problem?

Answer 1

Hi there,

It's not likely the computer, it's more then likely the issue is with the front O2 sensor. This will cause a lean code and may also cause the issue with not working in a closed loop. I would replace this before replacing the computer. The computers don't fail often.