P222DBarometric Pressure Sensor B Circuit High
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- How the car detects it
- 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.
- What you may notice
- Check engine light
- Second barometric reading stuck near the top of its range
- Likely causes
- LikelyConnector of sensor B unplugged or signal wire broken
- PossibleSignal wire shorted to 5 V or battery voltage
- RareSensor B internally defective
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Often possible to do yourself.Typical cost: €40 – €350
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.