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.
P2A01O2 Sensor 1/2 Circuit Performance
P2A01O2 Sensor 1/2 Circuit Performance
P2A01:00HO2S (RH) circuit range/performance
Manufacturer communications
5Original wording in English
FORD
Some 2020-2022 F-Super Duty vehicles equipped with a 6.7L engine may exhibit an illuminated malfunction indicator lamp (MIL) with diagnostic trouble codes (DTC) P0315, P054F, P054E, P2A00, P2A01, and/or P02ED stored in the powertrain control module (PCM). This may be due to the software in the PCM. To correct the condition, foll…
FORD
Some 2022 F-Super Duty vehicles equipped with a 6.7L engine and built on or before 05-Oct-2021 may exhibit an illuminated malfunction indicator lamp (MIL) with diagnostic trouble codes (DTC) P054E, P054F, P02ED, P2A00 And/Or P2A01 stored in the powertrain control module (PCM). This may be due to the software in the PCM. To corre…
MAZDA
Some customers may complain of a check engine light on while driving the vehicle. If DTCs P2A04:00, P2272:00 and/or other DTCs are found during diagnosis, follow the repair procedure below. P2A04:00 - HO2S (LH) circuit range/performance, P2272:00 - HO2S (LH) signal stuck lean, P2270:00 - HO2S (RH) signal stuck lean, P2A01:00 - H…
DODGE, RAM
MIL Illumination Due to P2000, P2A00 and/or P2A01 FRONT O2 sensor. Customer may experience MIL illumination. Further investigation by the technician may find one or more of the following DTC(s) present: P2000 - NOX Absorber Efficiency Below Threshold - Bank 1. P2A00 - O2 Sensor 1/1 Circuit Performance. P2A01 - O2 Sensor 1/2 Circ…
Check vehicle applicability
33A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.
| Make | Model | Model year |
|---|---|---|
| Dodge | RAM 2500 ↗ | 2011 |
| Dodge | RAM 2500 ↗ | 2010 |
| Dodge | RAM 2500 ↗ | 2008 |
| Dodge | RAM 2500 ↗ | 2007 |
| Dodge | RAM 3500 ↗ | 2011 |
| Dodge | RAM 3500 ↗ | 2010 |
| Ford | F-250 SD ↗ | 2022 |
| Ford | F-250 SD ↗ | 2021 |
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.