Barometric Pressure Sensor Circuit Intermittent/Erratic
The P222E code indicates that the Engine Control Module (ECM) has detected an intermittent or erratic signal from the barometric pressure (BARO) sensor circuit. This sensor measures atmospheric pressure to help the ECM adjust fuel delivery and ignition timing. An intermittent fault can cause drivability issues and may be due to wiring problems, sensor failure, or ECM issues.
01. Most Common Causes
- Faulty barometric pressure sensor
- Damaged or corroded wiring/connectors in the sensor circuit
- Intermittent short or open in the sensor signal circuit
- ECM software or hardware issue
02. Symptoms You Will Notice
- Check Engine Light illuminated
- Poor engine performance or hesitation
- Rough idle or stalling
- Decreased fuel economy
03. Step-by-Step Diagnosis
Step 1: Scan for additional codes and record freeze frame data.
Step 2: Visually inspect the BARO sensor and its wiring for damage, corrosion, or loose connections.
Step 3: Use a multimeter to check sensor voltage and ground at the connector; compare to manufacturer specs.
Step 4: If wiring is intact, test the sensor by monitoring its output with a scan tool while varying engine load.
Step 5: Replace the sensor if it fails testing; if problem persists, check ECM for faults.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
It is generally not recommended to drive long distances as the erratic sensor can cause poor performance and potential stalling. Short trips to a repair shop are acceptable.
How much does it cost to fix?▼
The cost typically ranges from $50 to $150 for diagnosis and sensor replacement, depending on labor rates and parts.