P222D — Barometric Pressure Sensor "B" Circuit High
powertrain (engine/transmission)
Is it safe to drive?
Short-term driving is OK In most cases the car remains drivable, possibly with reduced performance or a disabled auxiliary system. If symptoms include stalling, no-start or brake/steering warnings, treat it as urgent.
How to diagnose with an OBD scanner
- Read the code and freeze frame Connect an OBD2 scanner, confirm P222D is stored, and save the freeze frame data — it shows engine conditions when the fault was detected.
- Check for companion codes and TSBs Related codes often reveal the real root cause. Also check manufacturer technical service bulletins (TSB) for your make and model — many P0xxx issues have factory fixes or software updates. Search by VIN on the manufacturer site or nhtsa.gov.
- Inspect wiring and connectors Visually inspect the wiring harness and connectors related to the barometric pressure sensor "B" for damage, corrosion, chafing or poor contact.
- Subsystem check With the barometric pressure sensor "B" disconnected, measure signal voltage at the harness connector: a high reading with the component unplugged indicates a short to power in the harness; if it drops to normal, the component itself is faulty.
- Subsystem check Measure reference voltage, ground and signal continuity at the component connector.
- Subsystem check Wiggle-test the harness while watching the signal in live data — dropouts reveal broken wires.
- Verify the repair Clear the code, complete a full drive cycle including the conditions from the freeze frame, and confirm P222D does not return.
Approximate repair cost
Repair cost depends on which component actually failed. Typical scenarios for P222D (parts and labor, USD, independent shop rates): Control module repair: $300–$1,000; Repair wiring or connectors: $80–$250; Replace the faulty sensor or actuator: $150–$500. Overall, fixing P222D usually costs between $80 and $1,000. An accurate diagnosis before buying parts saves money — the most expensive scenario is rarely the first one to check.
Common questions
How do I diagnose P222D myself?
Start with a scan: confirm P222D, save the freeze frame and note any companion codes. Then inspect the wiring and connectors related to the barometric pressure sensor "B", and verify the suspect component against live data before buying parts.
What are the symptoms of P222D?
Drivers most often notice: increased fuel consumption in some cases, possible limp mode depending on the affected component, the affected system operates intermittently or not at all, Check Engine Light on.
How much does it cost to fix P222D?
Control module repair — $300–$1,000; Repair wiring or connectors — $80–$250; Replace the faulty sensor or actuator — $150–$500. Exact cost depends on the root cause, your vehicle and local labor rates — a proper diagnosis is the cheapest first step.
Is it safe to drive with P222D?
In most cases the car remains drivable, possibly with reduced performance or a disabled auxiliary system. If symptoms include stalling, no-start or brake/steering warnings, treat it as urgent.
What is the most common cause of P222D?
The most common causes are: poor ground connection, faulty sensor or actuator of the affected circuit, open or shorted wiring in the circuit.
What does P222D mean?
The engine control module sets P222D when it detects a fault in the sensor and actuator circuits. In practical terms: barometric pressure sensor "B" circuit high. The code belongs to the powertrain (engine/transmission) group of OBD2 codes.
“Circuit high” means the control module sees a voltage on the barometric pressure sensor "B" circuit that is above the expected range — typically close to battery voltage. Physically this points to a short to a power feed, a broken ground return, or a failed component pulling the signal line high.
To set P222D, the control module compares live readings of the sensor and actuator circuits against calibrated limits, usually over several drive cycles. Alongside the code it stores a freeze frame — a snapshot of rpm, load, coolant temperature and vehicle speed at the moment of failure. Reading that snapshot first saves diagnostic time.
Common symptoms of P222D
- increased fuel consumption in some cases
- possible limp mode depending on the affected component
- the affected system operates intermittently or not at all
- Check Engine Light on
What causes P222D?
- signal wire shorted to battery positive
- open ground return of the barometric pressure sensor "B"
- failed barometric pressure sensor "B" pulling the signal high
- poor ground connection
- faulty sensor or actuator of the affected circuit
- control module driver fault
- blown fuse feeding the circuit
- corroded, loose or damaged connector
How to diagnose P222D
- Connect an OBD2 scanner, confirm P222D is stored, and save the freeze frame data — it shows engine conditions when the fault was detected.
- Related codes often reveal the real root cause. Also check manufacturer technical service bulletins (TSB) for your make and model — many P0xxx issues have factory fixes or software updates. Search by VIN on the manufacturer site or nhtsa.gov.
- Visually inspect the wiring harness and connectors related to the barometric pressure sensor "B" for damage, corrosion, chafing or poor contact.
- With the barometric pressure sensor "B" disconnected, measure signal voltage at the harness connector: a high reading with the component unplugged indicates a short to power in the harness; if it drops to normal, the component itself is faulty.
- Measure reference voltage, ground and signal continuity at the component connector.
- Wiggle-test the harness while watching the signal in live data — dropouts reveal broken wires.
- Clear the code, complete a full drive cycle including the conditions from the freeze frame, and confirm P222D does not return.
How to fix P222D
Start with the cheapest and most common causes before replacing expensive parts:
- Control module repair — $300–$1,000
- Repair wiring or connectors — $80–$250
- Replace the faulty sensor or actuator — $150–$500
How much does it cost to fix P222D?
Repair cost depends on which component actually failed. Typical scenarios for P222D (parts and labor, USD, independent shop rates):
- Control module repair: $300–$1,000
- Repair wiring or connectors: $80–$250
- Replace the faulty sensor or actuator: $150–$500
Overall, fixing P222D usually costs between $80 and $1,000. An accurate diagnosis before buying parts saves money — the most expensive scenario is rarely the first one to check.
Can you drive with P222D?
In most cases the car remains drivable, possibly with reduced performance or a disabled auxiliary system. If symptoms include stalling, no-start or brake/steering warnings, treat it as urgent.