Hyundai P1123: Fuel Trim Adaptive Air System Too Rich
Is your scanner showing Hyundai P1123?
No worries. We'll show you what it means and how to deal with it.
Hyundai P1123: Fuel Trim Adaptive Air System Too Rich
OVERVIEWWhat Does The Hyundai P1123 Code Mean?
Engine started, engine speed less than 1000 rpm in closed loop, ECT sensor more than 158ºF, MAF sensor indicating less than 5.5 g/sec, EVAP purge is “off”, and the PCM detected the Short Term fuel trim “rich” command exceeded 10-15% for over 30 seconds.
What Are The Potential Causes Of The Hyundai P1123 Code?
- Base engine “mechanical” fault affecting one or more cylinders
- EVAP system component has failed or canister fuel saturated
- Exhaust leaks located in front of the HO2S location
- Fuel control sensor is out of calibration (i. e. , ECT, IAT or MAP)
Recommended Parts
Below are some recommended auto parts to help you address the trouble code affecting your vehicle and get it running smoothly again:
Note: During the purchasing process, please check carefully whether the part you want to buy fits your car!
Reference Sources
Hyundai P1123, DTCDECODE.
