P2227: Barometric pressure sensor A range or performance problem
The barometric pressure reading does not agree with other sensors. Usually the sensor itself or a fault with the intake pressure sensor.
| Code | P2227 |
|---|---|
| System | Engine and transmission |
| Group | P22xx, NOx sensors, oxygen sensors and emissions |
| Type | Generic: it means the same on every make |
| Can you keep driving? | With care |
What P2227 means
The barometric pressure sensor measures outside air pressure, which changes with altitude and weather. The ECU uses it to work out the mixture and turbo boost. With the engine off, this reading should be close to the intake pressure sensor; if they disagree or the value is impossible, the code is set. On many cars the sensor is built into the ECU.
Most common causes
- Intake manifold pressure (MAP) sensor reading wrongly and upsetting the comparison
- Blocked hose or port on the barometric sensor (if it is separate)
- Moisture or corrosion in the connector
- Faulty barometric sensor
- Internal ECU fault where the sensor is built in
Symptoms
- Engine warning light on
- Possible lack of power or limited boost
- Fuel consumption slightly off
- Sometimes no noticeable symptom
Can you drive with P2227?
With care You can drive, but the ECU may fall back on a default value and limit power. Do not leave it too long.
Open the bonnetthe in-depth explanation
How to check it
With the ignition on and engine off, compare live barometric pressure and intake manifold pressure (MAP): they should read almost the same, around 100 kPa at sea level and a bit less at altitude. The one that is out is the suspect.
How to read and clear P2227 with Final OBD
Plug an OBD2 scanner in under the steering wheel, switch the ignition on and open Final OBD. Under Faults you’ll see P2227 with its description and whether it’s confirmed, pending or permanent.
If the engine stores it over standard OBD, with FREE you read this code with its explanation for nothing and clear it. With PRO you also read the faults of every control unit and clear them in all of them.
Clearing the code only turns the light off: if the cause is still there, it comes back. Clear it once it’s fixed, and not right before an inspection. It’s all in how to read and clear fault codes and in inspections and OBD.
Similar codes
- P2223 The NOx sensor heater detection (bank 2) gives a lower signal than normal
- P2224 The NOx sensor heater detection (bank 2) gives a higher signal than normal
- P2225 The NOx sensor heater detection (bank 2) fails now and then
- P2226 The barometric pressure sensor A has an electrical fault
- P2228 Barometric pressure sensor A circuit low
- P2229 Barometric pressure sensor A circuit high
- P222A The barometric pressure sensor B has an electrical fault
- P222B The barometric pressure sensor B gives readings outside the normal range
- P2200 NOx sensor circuit fault (bank 1)
- P2201 NOx sensor circuit range or performance problem (bank 1)
- P2237 Oxygen sensor current control circuit open (bank 1, sensor 1)
- P2243 Oxygen sensor reference voltage circuit open (bank 1, sensor 1)
What does code P2227 mean?
The barometric pressure sensor measures outside air pressure, which changes with altitude and weather. The ECU uses it to work out the mixture and turbo boost. With the engine off, this reading should be close to the intake pressure sensor; if they disagree or the value is impossible, the code is set. On many cars the sensor is built into the ECU.
Can you drive with P2227?
You can drive, but the ECU may fall back on a default value and limit power. Do not leave it too long.
How do you clear P2227?
With an OBD2 scanner and an app like Final OBD, which clears it for free if it’s stored by the engine control unit. But clearing it only turns the light off: if the cause isn’t fixed, P2227 comes back.
Read it on your car
Final OBD reads and clears engine faults through standard OBD for free, each one explained in plain English. With PRO it also reads the faults of every control unit, each make’s own codes included, and clears them in all of them.
