OBD-II code family
Barometric Pressure Circuit Faults (5 codes)
5 related fault descriptions. Use each full code and the exact vehicle service information to identify its circuit, monitored condition, and required tests.
Codes in this family
This is the complete published member list for this guide. Each code retains its own page; shared diagnostic context does not mean that every member has the same test or repair.
What these codes mean
These five entries compare the barometric-pressure circuit category, range/performance, low, high and intermittent/erratic conditions. Preserve the full manufacturer report and any failure suffix. The name does not establish a separate replaceable sensor, an analog pinout or the exact function the controller evaluated.
First identify how the actual system obtains and reports barometric pressure. A display may be measured, retained, inferred or substituted. The archived Mazda6 SKYACTIV-G 2.5 cylinder-deactivation P2226:00 procedure monitors communication and nonvolatile-memory concerns in a BARO sensor built into the PCM and describes a substituted control value. That specific example does not approve a controller replacement on another application.
Range/performance is not one universal comparison. Ford’s selected gasoline summary distinguishes key-up and running pressure correlations. Its 2023–2024 diesel summary separately describes a P2227 observed-pressure floor and a different P0069 MAP/BARO rationality check. The named code therefore does not by itself certify electrically valid wiring or identify the one wrong sensor in a group of displays.
Low and high require the correct signal definition and test state. The cited gasoline and diesel summaries have different criteria. An unplugged pin may be biased by a controller; a recovered reference or changed display does not automatically identify a failed sensor. Use the actual schematic and protected diagnostic method before loading, disconnecting or changing a circuit.
Operating and air-path conditions can also matter in the right application. GM’s February 2024 18-NA-020 example lists P2227 on specified Equinox/Terrain engines with possible charge-air-cooler moisture and freezing. Its leak findings, vehicle build, prior work and operating conditions govern the service path. This is not a general recommendation to fit a cover, change a cooler or drive the vehicle harder.
For a pressure comparison, use an appropriate local absolute-pressure reference, correct units and the vehicle’s conditions. Weather reports and aviation settings may already be adjusted to sea level. A generic altitude formula, two agreeing displays or a stepped graph does not replace the required specifications and update strategy.
Preserve event information and symptoms, then have qualified personnel distinguish measurement, electrical, air-path, internal-component and software concerns. Do not wet live connectors, add unknown ground jumpers or perform a full-throttle road pull as a generic reset or test. Verify the confirmed repair through the prescribed procedure and obtain a written quote for the actual job. Follow real warnings and arrange help for unsafe engine operation or power response.
Identify the circuit on your vehicle
Match the full DTC, reporting module, and any failure-type suffix to the service information for your exact year, make, model, engine, and equipment. An identifier alone does not establish installed hardware count, location, connector pinout, or a universal measurement.
Where the manufacturer publishes its own meaning for this code, that is the one to work from — it describes the actual component on your vehicle, which the generic definition cannot. Keep the generic description for what it is good for: it tells you which subject area the standard assigned the code to, which is useful context when the two appear to disagree. If they do disagree, follow the manufacturer.