P222D code meaning
Barometric Pressure Sensor B Circuit High
Powertrain system Generic code P22xx codes Check engine light
What P222D means
P222D is stored when sensor B reports an excessive voltage. GM's 2018 tables for the 3.0 L LGW name contact with a supply voltage or a broken line: on that input a broken wire drives the signal up, not down. The limit is 90 % of the 5 V range, about 115 kPa, met in 320 of 400 readings; Type B, MIL after two trips. GM's 2023-2024 twin-throttle engine evaluates the raw pressure of the sensor ahead of the bank 2 throttle and fails it above 115 kPa held for 2 s. Since an open line lands here, a disconnected connector after repair work is a typical find. P222C covers the low side, P2229 the same fault on sensor A. The engine keeps running on the remaining sensors.
P222D 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 P222D
- Check engine light
- Second barometric reading stuck near the top of its range
Common causes of P222D
- Most likelyConnector of sensor B unplugged or signal wire broken
- PossibleSignal wire shorted to 5 V or battery voltage
- Less likelySensor B internally defective
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 P222D 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). |
| 2D | The exact fault in that area. |
What to do next
- Note P222D 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 P222D
What does P222D mean?
P222D means "Barometric Pressure Sensor B Circuit High". P222D is stored when sensor B reports an excessive voltage. It is a generic code, so it means the same on every make.
Is it safe to drive with P222D?
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 P222D fail an emissions test?
Yes, it can. P222D 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 P222D 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 P222D clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.