P0057: HO2S Heater Control Circuit Low Bank 2 Sensor 2
What Does P0057 Mean?
P0057 is a diagnostic trouble code indicating: HO2S Heater Control Circuit Low Bank 2 Sensor 2. This code relates to the fuel and air metering system. It has been reported in NHTSA complaints across 2 different vehicle models.
P0057 Reports by Year
Real Owner Reports
From NHTSA complaint database — actual owner descriptions.
"The contact's girlfriend owns a 2012 Subaru Outback. The contact stated that the vehicle hesitated while starting. In addition, the contact attempted to jumpstart the vehicle; however, the vehicle failed to start. The check engine warning light was intermittently illuminated. The contact stated that"
— Subaru Outback owner, 06/15/2019
"ALL THE LIGHTS ON THE DASH CAME ON AT ONCE . THE NON SKID, CHECK ENGINE , CRUISE LIGHTS WOULDN'T GO OFF . I TOOK IT TO THE SUBARU DEALERSHIP AND THEY MADE OUT LIKE IT WAS NOTHING . I TOOK IT 3 DIFFERENT TIMES THEY ENDED UP CHARGING ME $500 DOLLARS AND NEVER FIXED ANYTHING. IN A MONTHS TIME THEY CAM"
— Subaru Forester owner, 08/20/2015
Source: NHTSA Complaints Database
Most Reported Vehicles for P0057
Based on NHTSA owner complaint data.
| # | Vehicle | Reports |
|---|---|---|
| 1 | SUBARU OUTBACK | |
| 2 | SUBARU FORESTER |
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
- 🔧 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.