Reference meaning
What does this code mean?
The wording below belongs to the named make and communication. Match the complete code, reporting module, model year and engine before applying it.
A code identifies a detected condition, not a part that must automatically be replaced.
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A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.
Before replacing a part
Record codes and freeze-frame data. Check battery condition, related codes and visible wiring or hose damage. Follow the vehicle's diagnostic procedure and test results before replacing parts.
Scan worksheet →Manufacturer wording
Source wording can vary by vehicle and suffix. It is shown as written, not as a universal diagnosis.
P0037O2 Sensor 1/2 Heater Circuit Low
P0037O2 Sensor 1/2 Heater Circuit Low
P0037HO2S2 HEATER
Manufacturer communications
18Original wording in English
CHRYSLER
Flash: Powertrain Control Module (PCM) Updates This bulletin involves updating the PCM with the latest available software. Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation, the technician may notice one or more of the following DTCs have been set: P1AC6-00 - MCPA Crankshaft Pos…
CHRYSLER
Flash: Powertrain Control Module (PCM) Updates This bulletin involves reprogramming the PCM with the latest available software. Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find one or more of the following Diagnostic Trouble Codes (DTCs) have been set: P…
CHRYSLER
Flash: Powertrain Control Module (PCM) Updates This bulletin involves reprogramming the PCM with the latest available software. Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find one or more of the following Diagnostic Trouble Codes (DTCs) have been set: P…
NISSAN
2020 PATHFINDER; MIL ON WITH DTC P0037 STORED IF YOU CONFIRM The MIL is ON and DTC P0037 (HO2S2 HEATER) is stored in the ECM. ACTION 1. Confirm the current ECM part number. 2. Reprogram the ECM, if applicable.
Check vehicle applicability
45A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.
| Make | Model | Model year |
|---|---|---|
| Buick | ENCLAVE ↗ | 2015 |
| Buick | ENCLAVE ↗ | 2014 |
| Buick | ENCLAVE ↗ | 2013 |
| Chevrolet | TRAVERSE ↗ | 2015 |
| Chevrolet | TRAVERSE ↗ | 2014 |
| Chevrolet | TRAVERSE ↗ | 2013 |
| Chrysler | 300 ↗ | 2006 |
| Chrysler | 300 ↗ | 2005 |
Code meaning and manufacturer information
Original wording in English · Historical directory labels; manufacturer applicability has not been established for every entry.
HO2S Heater Control Circuit Low (Bank 1 Sensor 2)
Can I keep driving?
A code alone cannot establish whether driving is safe. A flashing malfunction light, severe shaking, overheating, oil-pressure warning or loss of braking or steering needs prompt attention. Stop in a safe place and seek assistance when control or engine safety is affected. Follow the vehicle handbook.