What Does P222D Mean?
The barometric pressure sensor 'B' is reporting a voltage signal that exceeds the maximum expected threshold. This typically indicates an open circuit, sensor internal failure, or voltage supply issue.
Common Causes
35%
Open circuit in BARO sensor B signal or ground wire
30%
Failed barometric pressure sensor B (internal open)
20%
Disconnected or loose sensor connector
10%
Poor ground connection at sensor
5%
5V reference circuit fault at PCM
Diagnostic Steps
1
Step 1: Check BARO sensor B connector for proper seating and terminal tension
2
Step 2: Measure voltage at sensor signal wire (high voltage >4.8V indicates open circuit)
3
Step 3: Check continuity of signal wire from sensor to PCM (should have continuity)
4
Step 4: Verify sensor ground circuit has less than 0.1 ohms resistance to battery negative
5
Step 5: Substitute known-good sensor B or monitor live data while wiggling harness to isolate fault
Estimated Repair Cost
$100 - $350
Parts + labor, varies by vehicle and location
The barometric pressure sensor 'B' is reporting a voltage signal that exceeds the maximum expected threshold. This typically indicates an open circuit, sensor internal failure, or voltage supply issue.
The most common cause of P222D (Barometric Pressure Sensor "B" Circuit High) is: Open circuit in BARO sensor B signal or ground wire
Typical repair costs for P222D range from $100 to $350, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Engine may default to stored altitude values causing poor performance and fuel economy. Safe to drive short distances but should be repaired promptly.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P222D to identify the root cause.
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Quick Info
Category
Powertrain
System
Engine Management / Fuel Delivery
Difficulty
Type
Generic (SAE)
Recommended Tools
OBD2 Scanner
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