P222A code meaning
Barometric Pressure Sensor B Circuit
Powertrain system Generic code P22xx codes Check engine light
What P222A means
P222A is the general circuit code for a second barometric pressure sensor, B. Only some engines carry one. GM's tables for the 3.0 L twin-turbo V6 (LGW, 2018) and for 2023-2024 twin-throttle engines monitor such a sensor B, but they report its circuit faults with the more specific codes P222C (low) and P222D (high) and do not use P222A. No maker documents P222A publicly. Read it as an unspecified electrical fault of sensor B, comparable to P2226 for sensor A, which Ford now stores with a failure-type byte that tells the type of fault. CARB requires circuit monitoring of every input sensor used by an emission-relevant function. Check wiring, connector and the 5 V supply; the engine usually keeps running on sensor A or a model value.
P222A at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modeNot expected
- Repair difficultyMedium, DIY possible
- Typical labor0.5 to 2 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P222A
- Check engine light
- Usually no noticeable change in how the engine runs
Common causes of P222A
- Most likelyDamaged wiring or corroded connector at sensor B
- PossibleBarometric pressure sensor B defective
- Less likelyFault in the shared 5 V sensor supply
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Barometric pressure sensorSensor wiring
What each part of P222A means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 2 | Generic code (second SAE range): it means the same on every make. |
| 2 | Area: fuel and air metering (injector circuit). |
| 2A | The exact fault in that area. |
What to do next
- Note P222A and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P222A
What does P222A mean?
P222A means "Barometric Pressure Sensor B Circuit". P222A is the general circuit code for a second barometric pressure sensor, B. It is a generic code, so it means the same on every make.
Is it safe to drive with P222A?
Usually yes, for a short time, if the check engine light is steady and the car drives normally. If the light flashes or the car runs badly, stop and have it checked.
Will P222A fail an emissions test?
Yes, it can. P222A is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is P222A to fix?
Difficulty: medium. A typical repair takes 0.5 to 2 hours of work. A careful DIY repair is possible with basic tools and a scanner.
Will P222A clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.