P227B on 2025 Chevrolet Corvette (ZR1, ZR1 1LZ, ZR1 2LZ, ZR1 3LZ, ZR1 ZTK) — Barometric Pressure Sensor 2 Performance
1 vehicles · 1 makes · $200-$2,500 repair
Most Reported On
P227B is an OBD-II diagnostic trouble code meaning “Barometric Pressure Sensor 2 Performance.” General Motors names this code Barometric Pressure Sensor 2 Performance (in generic SAE terms, Barometric Pressure Sensor "C" Circuit Range/Performance). The ECM cross-checks each barometric pressure input against the others and against modelled ambient pressure. P227B sets when barometric pressure sensor 2 returns an irrational reading — one that is within its electrical limits but does not correlate with the rest of the pressure data. On multi-sensor forced-induction engines this code frequently appears alongside P222B, because the module is comparing several ambient/boost references against each other. This code is most commonly reported on 2025 Chevrolet Corvette (ZR1, ZR1 1LZ, ZR1 2LZ, ZR1 3LZ, ZR1 ZTK), with repair costs ranging from $200 to $2,500.
Common Causes
Typical Repair Cost
Based on 1 documented vehicle-specific issues. Actual cost depends on root cause and vehicle.
Diagnostic Tools
This is a powertrain code, so a basic OBD-II reader can read it. These read P227B.
ANCEL AD310 Classic OBD-II Scanner
by ANCEL
A simple code reader for engine (P) codes on many compatible OBD-II vehicles. It does not support every vehicle or hybrid/EV application, and it does NOT read body, chassis or network codes; confirm exact-vehicle compatibility before buying.
- Read & clear engine (P) codes
- View freeze frame data
- I/M readiness status
- No batteries or app needed
BlueDriver Pro Bluetooth Scanner
by BlueDriver
Bluetooth scanner with a companion app that reads beyond the engine module — ABS, SRS and transmission — plus manufacturer-specific codes on many vehicles.
- Enhanced diagnostics (ABS, SRS, transmission)
- Repair Reports with verified fixes
- Smog check readiness
- Free app (iOS & Android)
LAUNCH CRP123X V3.0 Elite OBD-II Scanner
by LAUNCH
Handheld scanner covering the four major systems (engine, transmission, ABS, SRS) with live data streaming and graphing.
- Engine, transmission, ABS, SRS diagnostics
- Live data stream & graphing
- AutoVIN for vehicle identification
- Free lifetime updates via Wi-Fi
Autel MaxiCOM MK808S Diagnostic Tool
by Autel
Shop-level tablet with all-system coverage and bi-directional control, so you can command a module rather than only read it.
- All-system diagnostics (25+ modules)
- Bi-directional control & active tests
- Oil reset, EPB, BMS, TPMS, injector coding
- 7-inch touchscreen with Android OS
What you can do yourself, and what needs a shop
Reading the code, clearing it, and watching whether it returns is a driveway job with the right scanner. These steps are not:
- Module programming or software updates — needs the manufacturer software or a J2534 pass-through with a paid subscription.
- Replacing a control module — most are VIN-programmed and immobilizer-registered, so a new one does nothing until it is coded to your car.
- Airbag/SRS component work — a stored fault can deploy a live device.
If the vehicle is still under warranty, check for an open recall or technical service bulletin before buying anything — the repair may already be covered.
As an Amazon Associate, we earn from qualifying purchases. Prices are approximate and may vary.
FAQ
What does P227B mean?
P227B stands for "Barometric Pressure Sensor 2 Performance." General Motors names this code Barometric Pressure Sensor 2 Performance (in generic SAE terms, Barometric Pressure Sensor "C" Circuit Range/Performance). The ECM cross-checks each barometric pressure input against the others and against modelled ambient pressure. P227B sets when barometric pressure sensor 2 returns an irrational reading — one that is within its electrical limits but does not correlate with the rest of the pressure data. On multi-sensor forced-induction engines this code frequently appears alongside P222B, because the module is comparing several ambient/boost references against each other.
What are the most common causes of P227B?
The most common causes of P227B are: Failed or drifted barometric pressure sensor 2, Damaged, corroded or loose connector and wiring at the sensor, Blocked or contaminated sensor reference port, Induction system leak, loose charge-air pipe or restricted air filter upsetting the correlation, Software calibration out of date (check for applicable manufacturer bulletins), Faulty ECM (rare). The specific cause varies by vehicle.
How much does it cost to fix P227B?
Repair costs for P227B range from $200 to $2,500, depending on the vehicle and root cause.
Which vehicles are affected by P227B?
Au7o has documented P227B across 1 vehicle models from 1 manufacturers: Chevrolet.
Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.