Barometric Pressure Sensor Circuit Low
The P2225 code means the vehicle's onboard diagnostic system has detected: Barometric Pressure Sensor Circuit Low. This is a low severity code.
- Keep driving?
- Yes, but fix soon
- DIY difficulty
- moderate
- Estimated cost
- $40 - $250 (parts and labor)
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Common Symptoms
- Check Engine Light on
- Engine runs rich at lower altitudes
- Decreased fuel economy
- Slight power loss
- Rough idle
Probable Causes (Ranked by Likelihood)
- Open circuit in barometric pressure sensor wiring Very High
- Failed barometric pressure sensor High
- Corroded sensor connector Moderate
- Blocked sensor port preventing accurate pressure reading Moderate
- ECM internal fault on the sensor input circuit Low
Step-by-Step Diagnostic Procedure
-
Read the barometric pressure value with a scan tool -- compare to actual atmospheric pressure
-
Inspect wiring from the sensor to the ECM for open circuits
-
Clean or replace the sensor connector if corroded
-
Verify the sensor port is not blocked
-
Replace the barometric sensor if wiring is intact
Frequently Asked Questions
What happens when barometric pressure reads low?
The ECM interprets a low reading as high altitude and reduces fuel delivery accordingly. At actual lower altitudes, this creates a lean condition that can cause performance issues.
Can a blocked sensor port cause P2225?
Yes, if the port that allows the sensor to measure atmospheric pressure is blocked by debris or moisture, the reading will be inaccurate and can trigger a low circuit code.
Is the barometric pressure sensor hard to replace?
No, most barometric pressure sensors are easily accessible and relatively inexpensive. The replacement is typically a straightforward plug-and-play procedure.
Sources
This page is built from documented references. Verify against your own service info before repair work.
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