P0038: HO2S Heater Control Circuit High Bank 1 Sensor 2
What Does P0038 Mean?
P0038 is a diagnostic trouble code indicating: HO2S Heater Control Circuit High Bank 1 Sensor 2. This code relates to the fuel and air metering system. It has been reported in NHTSA complaints across 1 different vehicle models.
Common Causes
- 🔍 Sensor or control module malfunction
Real Owner Reports
From NHTSA complaint database — actual owner descriptions.
"THE CAR CUT OFF 3 TIMES IN ONE DAY FOR NO APPARENT REASON; ONCE WHILE PULLING OUT INTO ONCOMING TRAFFIC, THEN AFTER FUELING THE CAR AND PULLING OUT OF THE GAS STATION INTO ONCOMING TRAFFIC, THEN WHILE DRIVING DOWN THE STREET AT ABOUT 35 MPH. FORTUNATELY, I SAFELY GUIDED THE CAR TO THE SIDE OF THE RO"
— Chrysler 300 owner, 05/27/2015
Source: NHTSA Complaints Database
Most Reported Vehicles for P0038
Based on NHTSA owner complaint data.
| # | Vehicle | Reports |
|---|---|---|
| 1 | CHRYSLER 300 |
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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Find your vehicle above
Click your make and model for real owner reports and common causes specific to your vehicle.
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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.