Emissions
Code P0161
O2 Sensor Heater Circuit Bank 2 Sensor 2
Plain English Meaning:Rear oxygen sensor heater malfunction
✅
Green: Safe to Drive
Low urgency
What You'll Notice (Symptoms)
- •Check engine light emissions fail
Most Common Causes
1Sensor heater failure
Verified Repair Playbook
Required Mechanic Tests
A qualified shop should perform these tests before replacing any parts to ensure they aren't guessing:
Test heater circuit
Typical Fix Paths & Estimated Costs
Replace sensor $100–$300
🛒 Parts for P0161 Repair
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Fair Pricing Guides
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