P222B on Chevrolet
Barometric Pressure Sensor "B" Circuit Range/Performance
P222B on Chevrolet vehicles indicates barometric pressure sensor "b" circuit range/performance. Au7o has documented this code across 1 Chevrolet model — most commonly on Corvette. SAE-defined generic powertrain code. The engine control module uses barometric (ambient) pressure to correct fuelling, spark and — on boosted engines — the boost-pressure calculation. P222B sets when the second barometric pressure sensor (sensor "B") reports a value that is electrically in range but implausible: it does not agree with the other pressure sensors, with modelled barometric pressure, or with the value expected for the current conditions. The signal is present but the module has decided it cannot be trusted. Typical repair costs on Chevrolet range from $200 to $2,500, depending on the specific model and root cause.
Common Causes of P222B
- •Failed or drifted barometric pressure sensor "B"
- •Corroded, wet or loose sensor connector, or chafed signal/reference wiring
- •Restricted, blocked or contaminated sensor pressure port
- •Intake or induction leaks, or a restricted air filter, skewing sensor correlation on boosted engines
- •Faulty ECM (rare)
P222B on Chevrolet by Model
Chevrolet Corvette(1 issue)
- ZR1 LT7 Check Engine Light with DTCs P222B and/or P227B2025
GM released Bulletin #25-NA-239, 'Malfunction Indicator Lamp (MIL) Illuminated - DTC P222B and/or P227B Set,' with fitment limited to 2025 Corvette models equipped with the 5.5L twin-turbo LT7 - that is, the ZR1 only. Both codes fall in the boost-control/turbocharger DTC block, and the paired 'A'/'B' code structure lines up with the LT7's two turbochargers and their separate boost control channels. Because the bulletin is engine-code specific, this fault cannot occur on the naturally aspirated LT6 Z06, the LT2 Stingray, or the E-Ray.
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View P222B across all makes →Frequently Asked Questions
What does P222B mean on Chevrolet?▼
P222B stands for "Barometric Pressure Sensor "B" Circuit Range/Performance." SAE-defined generic powertrain code. The engine control module uses barometric (ambient) pressure to correct fuelling, spark and — on boosted engines — the boost-pressure calculation. P222B sets when the second barometric pressure sensor (sensor "B") reports a value that is electrically in range but implausible: it does not agree with the other pressure sensors, with modelled barometric pressure, or with the value expected for the current conditions. The signal is present but the module has decided it cannot be trusted. On Chevrolet specifically, this code is documented across 1 model.
What causes P222B on Chevrolet vehicles?▼
Common causes on Chevrolet: Failed or drifted barometric pressure sensor "B", Corroded, wet or loose sensor connector, or chafed signal/reference wiring, Restricted, blocked or contaminated sensor pressure port, Intake or induction leaks, or a restricted air filter, skewing sensor correlation on boosted engines, Faulty ECM (rare). Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P222B on a Chevrolet?▼
Repair costs on Chevrolet range from $200 to $2,500, depending on the specific model and root cause.
Which Chevrolet models have P222B documented?▼
Au7o has documented P222B on 1 Chevrolet model: Corvette.