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.
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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.
P0139HO2S2 (B1) (Heated oxygen sensor 2 circuit slow response)
P0139O2 Sensor Circuit Slow Response Bank 1 Sensor 2
P0139-00O2 Sensor Circuit Slow Response (Bank 1 Sensor 2)
Manufacturer communications
42Original wording in English
DODGE
Flash: Powertrain Control Module (PCM) Updates PCR9A Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must SYMPTOM: exhibit/set one or more of the following Diagnostic Trouble Codes (DTCs): ● **P032F-00 - Combustion Engine Producing Insufficient Torque. ● P2D28-00 - Cold Start Propulsion …
VOLVO
This is a Technical Journal: Check engine light and DTC - ECM P013926. Do not replace any parts. The hardware is usually not at fault. A new ECM (Engine Control Module) software has been released in version 4.2.13.
HONDA
Service Bulletin - The MIL comes on with DTC P0139 (secondary heated oxygen sensor slow response) due to the ECM/PCM misinterpreting the secondary heated oxygen sensor output and sets DTC P0139.
VOLVO
This is a Technical Journal: Check engine light and DTC - ECM P013926. Do not replace any parts. The hardware is usually not at fault.
Check vehicle applicability
141A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.
| Make | Model | Model year |
|---|---|---|
| Alfa Romeo | 4C SPIDER ↗ | 2017 |
| Alfa Romeo | GIULIA ↗ | 2017 |
| Cadillac | XLR ↗ | 2004 |
| Chevrolet | SILVERADO 2500 ↗ | 2013 |
| Chevrolet | SILVERADO 3500 ↗ | 2013 |
| Chrysler | 300 ↗ | 2005 |
| Chrysler | SEBRING ↗ | 2008 |
| Chrysler | SEBRING AWD ↗ | 2008 |
Code meaning and manufacturer information
Original wording in English · Historical directory labels; manufacturer applicability has not been established for every entry.
O2 Sensor Circuit Slow Response (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.