Test H: Step 20
20) Check Resistance of HEGO Heating Element Turn key off, disconnect HEGO sensor, and set DVOM on 200-ohm scale. Measure resistance between KPWR circuit and PWR GND circuit at HEGO sensor connector. Hot to warm resistance should be 5.0-25.0 ohms. Room temperature resistance is 2.0-5.0 ohms. If resistance is within specification, go to next step. If not, replace HEGO sensor, and repeat QUICK TEST.