Sensor Inspection
WARNING: This page is about a different car, the 2021 Hyundai Kona. However, it is still accessible from the selected car via links, so may be relevant.
- Visually/physically inspect the front HO2S for the following conditions:
- Ensure that the HO2S is securely installed.
- Silicon contamination. This contamination will be indicated by a white powdery coating on the portion of the sensor exposed to the exhaust stream and this will result in a but false (high) voltage signal
- Fuel, engine coolant or oil contamination
- Use of improper sealant
- If contamination is evident on the HO2S, Fix the source of the sensor contamination before replacing the sensor to prevent future contamination. Go to "VERIFICATION OF VEHICLE REPAIR " procedure.
- Visually/physically inspect the MAFS for the following conditions:
- Contamination or deterioration
- Poor connection or damaged harness
- Check for an intermittent TPS 1 false signal. TPS 1 signal displayed on a GDS should increase steadily when depressing accelerator pedal after starting.
- Verify that the PCM ground connections are clean and properly tightened.
- If test result is NG, repair or replace as necessary and go to "VERIFICATION OF VEHICLE REPAIR " procedure. If OK, go to next step below.NOTE: If the contamination is evident on the HO2S or MAFS. Fix the source of the sensor contamination before replacing the sensor to prevent future contamination.