P0055 — HO2S Heater Resistance Bank 1 Sensor 3

What Does P0055 Mean?

P0055 is a diagnostic trouble code indicating: HO2S Heater Resistance Bank 1 Sensor 3. This code relates to the fuel and air metering system. The vehicle's computer detected a condition outside normal operating parameters and stored this code.

Symptoms of P0055

⚠️ Check Engine Light (MIL) illuminated
⚠️ HO2S Heater Resistance Bank 1 Sensor 3 not functioning as expected
⚠️ Related system may be in fail-safe mode
⚠️ Poor fuel economy

Common Causes

🔍 Faulty HO2S Heater Resistance Bank 1 Sensor 3
🔍 Wiring or connector issue in HO2S Heater Resistance Bank 1 Sensor 3 circuit
🔍 Related mechanical or electrical fault
🔍 ECM/PCM issue (rare)

Frequently Asked Questions

What does P0055 mean?

P0055 indicates: HO2S Heater Resistance Bank 1 Sensor 3. The vehicle's computer has detected that the HO2S Heater Resistance Bank 1 Sensor 3 is not operating within its expected parameters and stored this diagnostic trouble code.

Can I drive with code P0055?

You can drive short distances for essential trips, but schedule a diagnosis soon. Driving with P0055 for extended periods may cause additional problems.

How much does it cost to fix P0055?

Repair costs for P0055 typically range from $80 to $300, depending on the root cause. Simple wiring or connector repairs are on the lower end, while component replacement costs more. A proper diagnosis ($80–$150 at most shops) will identify the exact cause before committing to expensive parts.

What To Do Next

Possible Fixes

🔧 Inspect HO2S Heater Resistance Bank 1 Sensor 3 and related wiring
🔧 Replace faulty HO2S Heater Resistance Bank 1 Sensor 3

1
Find your vehicle above
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2
Check for recalls
Go to nhtsa.gov/recalls and enter your VIN. Free repairs if covered.
3
Get a professional diagnosis
A code alone doesn't identify the exact failed part. A diagnostic ($50–$150) pinpoints the root cause.

P0055: HO2S Heater Resistance Bank 1 Sensor 3