Hyundai DTC P1124 – Long term fuel trim -additive – mixture too lean
DTC P1124 meaning on Hyundai
DTC P1124 on a Hyundai indicates that the Long Term Fuel Trim – Additive – Mixture is too lean. This means that the engine control module (ECM) has detected that the air-fuel mixture is leaner than the ideal ratio for proper combustion.
Hyundai DTC P1124 symptoms
Symptoms of DTC P1124 on a Hyundai may include:
- Check Engine Light (CEL) illuminated on the dashboard
- Decreased fuel efficiency
- Engine hesitation or misfiring
- Rough idling
Hyundai DTC P1124 causes
Common causes of DTC P1124 on a Hyundai include:
- Vacuum leaks
- Faulty oxygen sensor
- Clogged fuel injectors
- Dirty or clogged air filter
- Fuel pressure regulator issues
Hyundai DTC P1124 seriousness
DTC P1124 should not be ignored as it can lead to poor engine performance and decreased fuel efficiency. Running the engine with a lean air-fuel mixture for an extended period can also cause damage to the catalytic converter.
How to diagnose DTC P1124 on Hyundai
To diagnose DTC P1124 on a Hyundai, a mechanic may perform the following steps:
- Use a scan tool to retrieve the fault code and freeze frame data
- Inspect for any visible vacuum leaks
- Check the oxygen sensor readings
- Test the fuel injectors and fuel pressure
- Inspect the air filter for dirt or clogs
How to fix DTC P1124 on Hyundai
To fix DTC P1124 on a Hyundai, the following steps may be taken:
- Repair any vacuum leaks
- Replace a faulty oxygen sensor
- Clean or replace clogged fuel injectors
- Replace the air filter if dirty
- Check and replace the fuel pressure regulator if necessary
How to erase DTC P1124 on Hyundai
To erase DTC P1124 on a Hyundai, the fault code can be cleared using a scan tool. After the necessary repairs have been made, the code can be cleared to reset the Check Engine Light.