P0061 HO2S Heater Resistance Bank 2 Sensor 3

P0061 points to heater resistance outside limits for bank 2 sensor 3. The third bank 2 oxygen sensor heater circuit is not normal.

Code details

Generic OBD-II · P0

System: Fuel / Air
Code type: Generic (SAE / ISO controlled)
Standard: SAE J2012 / ISO 15031-6

Diagnostic boundary

A diagnostic trouble code reports that a monitored test failed. It does not prove one specific part is bad, and manufacturer logic can add vehicle-specific conditions.

Do not assume bank 2 sensor 3 is present on every vehicle; verify the fitted exhaust and sensor layout first.

Symptoms of P0061

Check-engine light on, sometimes with rough or uneven running.
Hesitation, surging, or a noticeable change in fuel economy.
Occasionally hard starting or a smell of unburnt fuel.

Common causes of P0061

A failing or contaminated sensor (MAF, MAP, oxygen or air-fuel sensor).
Intake or vacuum leaks, or an exhaust leak near an upstream sensor.
Wiring, connector, or fuel-delivery problems that skew the reading.

Useful checks before replacing parts

Check bank 2 sensor 3 heater resistance, feed voltage, ground control, fuse supply, current draw, and connector condition.
Inspect exhaust-side harness routing, heat damage, terminal corrosion, shared heater power, and recent exhaust or sensor service.
Verify sensor position and bank labeling before replacing parts or comparing heater warm-up behavior.

Related OBD-II codes

These nearby fuel / air entries can help compare wording and pin down the fault area.