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P2229: Barometric pressure sensor A circuit high

The ECU sees too high a voltage from the barometric pressure sensor. Usually a damaged wire, a missing earth or the sensor itself.

Code P2229 at a glance
CodeP2229
SystemEngine and transmission
GroupP22xx, NOx sensors, oxygen sensors and emissions
TypeGeneric: it means the same on every make
Can you keep driving?With care

What P2229 means

The barometric pressure sensor measures outside air pressure so the ECU can adjust the mixture and boost. Circuit high means the voltage is above what is possible, almost always because of an electrical fault: a broken sensor earth, a signal wire touching a voltage source or the sensor itself. If it is inside the ECU, the fault may be internal.

Most common causes

  • Loose or corroded sensor connector
  • Broken sensor earth wire
  • Signal wire touching a voltage source
  • Faulty barometric sensor
  • Internal ECU fault if the sensor is built in

Symptoms

  • Engine warning light on
  • Possible lack of power or limited boost
  • Fuel consumption slightly off

Can you drive with P2229?

With care You can drive, but the ECU will use a default value and may limit power. Get it checked soon.

How to check it

With the engine off, look at live barometric pressure: a value well above normal (around 100 kPa at sea level) means an electrical fault. Gently move the sensor wiring while watching the reading to see if it changes.

How to read and clear P2229 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 P2229 with this same explanation and whether it’s confirmed, pending or permanent.

With Free you read this code with its short description for nothing, and clear it if the engine stores it over standard OBD. With Pro you get the full explanation, how the car was running when it was logged (revs, temperature, load) and clearing in every control unit.

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 the ITV. It’s all in how to read and clear fault codes and in the ITV and OBD.

Similar codes

P2229 is a generic code, so it means the same on any make, for example on Abarth, Cupra, Jeep, Nissan, Seat, Škoda. See what Final OBD does on your car in makes and models.

What does code P2229 mean?

The barometric pressure sensor measures outside air pressure so the ECU can adjust the mixture and boost. Circuit high means the voltage is above what is possible, almost always because of an electrical fault: a broken sensor earth, a signal wire touching a voltage source or the sensor itself. If it is inside the ECU, the fault may be internal.

Can you drive with P2229?

You can drive, but the ECU will use a default value and may limit power. Get it checked soon.

How do you clear P2229?

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, P2229 comes back.