Having a Hyundai car and being faced with the code P0173 can be an alarming experience for many drivers. The code P0173 is a Fuel Trim Too Rich or Too Lean (Bank 2) engine running in closed loop, and the PCM detected the Fuel system was too rich or too lean during two or more consecutive trips. It is important to understand the root causes of the code P0173 in order to effectively repair the underlying issue. This article will discuss the common causes and solutions of the P0173 code.
Common Causes and Solutions of P0173
| Cause | Solution |
|---|---|
| Base engine “mechanical” fault affecting one or more cylinders | Repair or replace the faulty cylinder components. |
| EVAP system component has failed or canister fuel saturated | Replace EVAP system components. |
| Exhaust leaks located in front of the HO2S location | Inspect the exhaust system for any leaks and repair them. |
| Fuel control sensor is out of calibration | Check and calibrate the fuel control sensor. |
Base Engine “Mechanical” Fault Affecting One or More Cylinders
When a Hyundai car’s code P0173 is triggered, one of the possible causes is a base engine mechanical fault affecting one or more cylinders. A faulty cylinder component can cause the car’s engine to run too rich or too lean and trigger the P0173 code. To fix this issue, the faulty components need to be identified and repaired or replaced.
EVAP System Component Has Failed or Canister Fuel Saturated
Another possible cause of the Hyundai Code P0173 is an EVAP system component that has failed or canister fuel that has become saturated. The EVAP system is responsible for collecting fuel vapors from the fuel tank and storing them in a canister. If the system components fail or the fuel canister becomes saturated, it can cause the engine to run too rich or too lean, triggering the P0173 code. The failed or saturated system components need to be replaced to fix this issue.
Exhaust Leaks Located in Front of the HO2S Location
The Hyundai Code P0173 can also be triggered by exhaust leaks located in front of the HO2S (oxygen sensor) location. If there is an exhaust leak, it can cause the engine to run too rich or too lean, triggering the P0173 code. To fix this issue, the exhaust system needs to be inspected for any leaks and repaired if necessary.
Fuel Control Sensor is Out of Calibration
Finally, the P0173 code can be triggered if the fuel control sensor is out of calibration. The fuel control sensor monitors the fuel level in the engine and sends data to the vehicle’s computer. If the sensor is out of calibration, it can cause the engine to run too rich or too lean and trigger the P0173 code. To fix this issue, the fuel control sensor needs to be checked and calibrated.
Conclusion
The Hyundai Code P0173 can be caused by a variety of factors, such as a base engine mechanical fault, EVAP system component failure, exhaust leaks, or a fuel control sensor that is out of calibration. To fix this issue, the underlying cause needs to be identified and repaired. To prevent the Hyundai Code P0173 from occurring, it is important to regularly inspect and maintain the vehicle’s engine, exhaust system, and fuel control sensor.
https://www.youtube.com/watch?v=K-UlvBZ95Jo