P2229 — Barometric Pressure Sensor "A" Circuit High

Is it safe to drive with P2229?

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.

Will P2229 clear itself?

Sometimes P2229 clears after a few drive cycles if the fault was intermittent — for example a loose connector or a tank of bad fuel. The underlying cause usually remains, so the code tends to return. Clear it once; if it comes back, diagnose rather than erase it repeatedly.

What is the most common cause of P2229?

The most common causes are: corroded, loose or damaged connector, control module driver fault, open or shorted wiring in the circuit.

What does OBD2 code P2229 mean?

Barometric Pressure Sensor "A" Circuit High (P2229): a powertrain (engine/transmission) fault affecting the sensor and actuator circuits. The car is usually drivable while you plan the repair. Most often caused by corroded, loose or damaged connector, control module driver fault, open or shorted wiring in the circuit.

How much does it cost to fix P2229?

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.

What does P2229 mean?

When P2229 appears on a scan, it means the control module has flagged a problem in the sensor and actuator circuits: barometric pressure sensor "A" circuit high. The fault sits in the powertrain (engine/transmission) group of the OBD2 standard.

“Circuit high” means the control module sees a voltage on the barometric pressure sensor "A" 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.

This code does not appear from a single bad reading: the module must see the fault condition repeat under defined operating conditions before it turns on the warning light. The freeze frame captured with P2229 — engine load, rpm, temperature, speed — tells you exactly when the problem occurs, so reproduce those conditions when testing.

What causes P2229?

• open ground return of the barometric pressure sensor "A"
• failed barometric pressure sensor "A" pulling the signal high
• signal wire shorted to battery positive
• control module driver fault
• poor ground connection
• faulty sensor or actuator of the affected circuit
• open or shorted wiring in the circuit

Common symptoms of P2229

• the affected system operates intermittently or not at all
• possible limp mode depending on the affected component
• Check Engine Light on
• increased fuel consumption in some cases

How to diagnose P2229

1. Connect an OBD2 scanner, confirm P2229 is stored, and save the freeze frame data — it shows engine conditions when the fault was detected.
2. 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.
3. Visually inspect the wiring harness and connectors related to the barometric pressure sensor "A" for damage, corrosion, chafing or poor contact.
4. With the barometric pressure sensor "A" 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.
5. Measure reference voltage, ground and signal continuity at the component connector.
6. Wiggle-test the harness while watching the signal in live data — dropouts reveal broken wires.
7. Clear the code, complete a full drive cycle including the conditions from the freeze frame, and confirm P2229 does not return.

How to fix P2229

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 P2229?

Repair cost depends on which component actually failed. Typical scenarios for P2229 (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 P2229 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 P2229?

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.

Related OBD2 codes

• P2200: NOx Sensor Circuit Bank 1
• P2201: NOx Sensor Circuit Range/Performance Bank 1
• P2202: NOx Sensor Circuit Low Bank 1
• P2203: NOx Sensor Circuit High Bank 1
• P2204: NOx Sensor Circuit Intermittent Bank 1
• P2205: NOx Sensor Heater Control Circuit/Open Bank 1