Barometric Pressure Sensor Circuit High
The P222D code indicates that the Engine Control Module (ECM) has detected a voltage signal from the barometric pressure sensor that is higher than the expected range. This sensor measures atmospheric pressure to help the ECM adjust fuel delivery and ignition timing. A high circuit condition typically means the signal voltage is stuck high, often due to a short to power, a faulty sensor, or wiring issues.
1. Most Common Causes
- Faulty barometric pressure sensor
- Short to voltage in the sensor circuit
- Damaged wiring or connector
- ECM internal fault (rare)
2. Symptoms You Will Notice
- Check Engine Light illuminated
- Poor engine performance or hesitation
- Reduced fuel economy
- Rough idle or stalling
3. Step-by-Step Diagnosis
Step 1: Use a scan tool to verify the code and check freeze frame data.
Step 2: Inspect the barometric pressure sensor wiring and connector for damage, corrosion, or shorts.
Step 3: Measure the sensor signal voltage with a multimeter; compare to manufacturer specifications (typically 4.5-5V at sea level).
Step 4: If voltage is high (e.g., 5V+), disconnect the sensor; if voltage drops, replace the sensor. If voltage remains high, repair the short to power in the wiring.
4. Frequently Asked Questions
Is it safe to drive with this code?▼
It is generally not recommended to drive long distances as the incorrect barometric pressure reading can cause poor fuel economy and drivability issues, potentially leading to further damage.
How much does it cost to fix?▼
The cost typically ranges from $50 to $150, including parts (sensor $30-$80) and labor (0.5-1 hour).
5. Commonly Affected Makes
This is a generic OBD2 code, potentially applicable to any manufacturer using this diagnostic standard.