Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Heated Oxygen Sensor: Inspection
- INSPECT HEATER RESISTANCE OF HEATED OXYGEN SENSORS
- Disconnect the oxygen sensor connector.
- Using an ohmmeter, measure the resistance between terminal +B and HT.
Resistance: 11 - 16 Ω at 20°C (68°F)
If the resistance is not as specified, replace the sensor.
Torque:
44 N.m (450 kgf.cm, 32 ft.lbf) for sensor 1
20 N.m (200 kgf.cm, 14 ft.lbf) for sensor 2
- Reconnect the oxygen sensor connector.
- INSPECT OPERATION OF HEATED OXYGEN SENSORS (See DTC P0130: OXYGEN SENSOR CIRCUIT (BANK 1 SENSOR CIRCUIT (BANK 1 SENSOR 1), DTC P0150 OXYGEN SENSOR CIRCUIT (BANK 2 SENSOR 1), DTC P2195 OXYGEN SENSOR SIGNAL STACK LEAN (BANK 1 SENSOR 1), DTC P2196 OXYGEN SENSOR SIGNAL STACK RICH (BANK 1 SENSOR 1), DTC P2197 OXYGEN SENSOR SIGNAL STACK LEAN (BANK 2 SENSOR 1), DTC P2198 OXYGEN SENSOR SIGNAL STACK RICH (BANK 2 SENSOR 1) and DTC P0136: OXYGEN SENSOR CIRCUIT MALFUNCTION (BANK 1 SENSOR 2), DTC P0156 OXYGEN SENSOR CIRCUIT MALFUNCTION (BANK 2 SENSOR 2) )
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.
When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
Rather have a pro handle this?
A certified mobile mechanic comes to your home or office. They bring the tools, you stay comfortable. No tow truck, no waiting room, no surprises.
No obligation. See pricing before you book.