OBD-II code · Powertrain (generic, extended)
P2228 Barometric Pressure Sensor Circuit Low
The barometric (ambient) pressure sensor reports a voltage below the valid window. The ECU uses this signal to compensate fuel and boost calculations for altitude — a stuck-low value tricks the ECU into thinking the car is at high altitude.
Is it safe to drive with P2228?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyBarometric pressure sensor failed
- PossibleSignal shorted to ground
- Less likelyConnector pins corroded - high contact resistance
Repair at a glance
- Difficulty
- Easy
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.3–1 h
- Emissions test
- Likely to fail
- After the fix
- A drive cycle is needed before the light stays off
- Parts involved
- Barometric Pressure Sensor, Bps Wiring
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.