P0051: HO2S Heater Control Circuit Low Bank 2 Sensor 1
What Does P0051 Mean?
P0051 is a diagnostic trouble code indicating: HO2S Heater Control Circuit Low Bank 2 Sensor 1. This code relates to the fuel and air metering system. It has been reported in NHTSA complaints across 1 different vehicle models.
Common Causes
- 🔍 Faulty oxygen sensor
- 🔍 Camshaft position sensor failure
- 🔍 Torque converter malfunction
- 🔍 Sensor or control module malfunction
Real Owner Reports
From NHTSA complaint database — actual owner descriptions.
"LOCK/UNLOCK REQUEST BUTTON ON THE OUTSIDE HANDLE DOES NOT RESPOND,EXTERIOR LAMP FOGGING, ENGINE,EQUIPMET ,IGITION SWTCH, P0744 TORQUE CONVERTER CLUTCH SOLENOID CIRCUIT INTERMITTENT, P1778 TRANSMISSION REVERSE I/P CIRCUIT, P0345 CAMSHAFT POSITION SENSOR A CIRCUIT, P0051 HO2S HEATER CONTROL CIRCUIT, "
— Nissan Murano owner, 11/01/2019
Source: NHTSA Complaints Database
Most Reported Vehicles for P0051
Based on NHTSA owner complaint data.
| # | Vehicle | Reports |
|---|---|---|
| 1 | NISSAN MURANO |
Frequently Asked Questions
Can I drive with this code?
Will this code cause my car to fail emissions?
How much does it typically cost to fix?
What To Do Next
Possible Fixes
- 🔧 Have the code scanned with a professional-grade scanner to read freeze frame data
- 🔧 Test the relevant sensor(s) with a multimeter before replacing
- 🔧 Clean or replace the mass air flow (MAF) sensor; check for vacuum leaks
- 🔧 If DIY repair isn't feasible, get a diagnostic from a trusted mechanic ($50-150)
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1
Find your vehicle above
Click your make and model for real owner reports and common causes specific to your vehicle.
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2
Check for recalls
Go to nhtsa.gov/recalls and enter your VIN. Free repairs if covered.
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Get a professional diagnosis
A code alone doesn't identify the exact failed part. A diagnostic ($50–$150) pinpoints the root cause.