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.
Manufacturer wording
Source wording can vary by vehicle and suffix. It is shown as written, not as a universal diagnosis.
P2201Aftertreatment NOx Sensor Circuit Performance - Bank 1 Sensor 1P2201-00Aftertreatment NOX Sensor Circuit Performance - Bank 1 Sensor 1P2201NOx Sensor Diagnostic Information TO BE USED BEFORE SENSOR REPLACEMENT - OBD13 And Newer Emissions (Commonly Model Year 20P2201NOx Sensor Circuit Range/PerformanceView all · Manufacturer wording →
Manufacturer communications
80Original wording in English
ISUZU
Reported code forms P2201
SERVICE BULLETIN: THE ORIGINAL CALIBRATIONS IN THE ENGINE CONTROL MODULE (ECM) AND THE DIESEL EXHAUST FLUID CONTROL UNIT (DCU) OF CERTAIN 2025MY N-DIESEL VEHICLES CONTAINED INCORRECT LOGIC THAT MAY UNNECESSARILY CAUSE…
ISUZU
Reported code forms P2201
CUSTOMER SATISFACTION CAMPAIGN: IN SOME 2025MY ISUZU N-SERIES VEHICLES EQUIPPED WITH 5.2L (4HK1) DIESEL ENGINES, OPERATORS MAY EXPERIENCE AN ILLUMINATED CHECK ENGINE MALFUNCTION INDICATOR LAMP (MIL) WITH DIAGNOSTIC…
ISUZU
Reported code forms P2201
SERVICE BULLETIN: THE ENGINE CONTROL MODULE AND THE DIESEL EXHAUST FLUID CONTROL UNIT OF CERTAIN 2025MY N-DIESEL VEHICLES CONTAINED INCORRECT LOGIC THAT MAY UNNECESSARILY CAUSE DTC P2201 NOX SENSOR CIRCUIT PERFORMANCE…
FORD
Reported code forms P2201:92
Some 2023-2024 F-Super Duty vehicles built on or before 22-Jul-2024 and equipped with a 6.7L engine may exhibit an illuminated malfunction indicator lamp (MIL) with diagnostic trouble codes (DTC) P203B, P206B, and/or…
FORD
Reported code forms P2201:92
Some 2024-2025 F-650/F-750 vehicles built on or before 22-Jul-2024 and equipped with a 6.7L engine may exhibit an illuminated malfunction indicator lamp (MIL) with diagnostic trouble codes (DTC) P203B, P206B, and/or…
HINO
Reported code forms P2201
We have determined that certain 2022 – 2024MY Hino S-Series vehicles equipped with 5.2L (4HK1) diesel engines and option (IE1) 4-wheel disc brakes were built with an Engine Control Module (ECM) and Diesel Exhaust Fluid…
Check vehicle applicability
247A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.
| Make | Model | Model year |
|---|---|---|
| Audi | A6 | 2016 |
| Audi | A6 | 2015 |
| Audi | A6 | 2014 |
| Audi | A7 | 2016 |
| Audi | A7 | 2015 |
| Audi | A7 | 2014 |
| Audi | A8 | 2016 |
| Audi | A8 | 2015 |
| Audi | A8 | 2014 |
| Audi | Q5 | 2016 |
| Audi | Q5 | 2015 |
| Audi | Q5 | 2014 |
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.
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.