What Does P222B Mean?
The barometric pressure sensor B is providing readings that are implausible or do not correlate with sensor A readings. The sensor may be functioning electrically but providing inaccurate atmospheric pressure data.
Common Causes
45%
Sensor B calibration drift or internal fault
25%
Contamination or physical damage to sensor B element
15%
Correlation issue between sensor A and sensor B readings
10%
Intermittent wiring causing signal accuracy problems
5%
PCM software requiring calibration update
Diagnostic Steps
1
Step 1: Monitor both sensor A and sensor B barometric pressure readings simultaneously with scan tool
2
Step 2: Compare both sensor readings to known accurate atmospheric pressure reference
3
Step 3: Check for difference between sensors exceeding manufacturer specifications (typically >0.5 kPa variance)
4
Step 4: Inspect sensor B for physical damage, debris blockage, or moisture in sensing element
5
Step 5: Clear codes and perform test drive, monitoring both sensors for consistency and accuracy
Estimated Repair Cost
$150 - $700
Parts + labor, varies by vehicle and location
The barometric pressure sensor B is providing readings that are implausible or do not correlate with sensor A readings. The sensor may be functioning electrically but providing inaccurate atmospheric pressure data.
The most common cause of P222B (Barometric Pressure Sensor "B" Circuit Range/Performance) is: Sensor B calibration drift or internal fault
Typical repair costs for P222B range from $150 to $700, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Safe to drive with primary sensor likely compensating. May result in reduced engine performance optimization and potential driveability concerns during altitude changes.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P222B to identify the root cause.
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Quick Info
Category
Powertrain
System
Fuel System and Engine Management
Difficulty
Type
Generic (SAE)
Recommended Tools
OBD2 Scanner
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