What it means
Barometric sensor B signal jumps or drops out intermittently. Wiring faults of this kind typically come from chafing, water ingress at connector seals, or pin push-back — a wiggle test on the harness while the code is active often confirms the location.
At a glance
- Usually lights the check-engine light
- Affects emissions; the car can fail an emissions test
How it works
Barometric Pressure Sensor B measures ambient pressure for engine control calculations. P222E is set when the controller sees Sensor B's signal jump, drop out, or otherwise fluctuate unexpectedly, often because a connector or harness loses contact with vibration.
Common causes
Most likely first.
- Intermittent connector
- Connector with intermittent contact under vibration
- Harness routed against vibrating component
Symptoms
- Check-engine light on
- Intermittent loss of power or hesitation
- Unsteady idle
- Increased fuel consumption
How to diagnose it
- Save freeze-frame data and watch Sensor B's live pressure reading for dropouts or sudden changes; compare it with Sensor A and plausible local pressure.
- Inspect Sensor B's connector for loose or corroded terminals, moisture, damaged seals, and pins that have pushed back.
- Check the Sensor B harness for chafing or routing against a vibrating or moving component.
- With the engine safely stationary, move sections of the Sensor B harness while monitoring the signal to locate a vibration-sensitive connection.
- Test Sensor B's signal, reference, and ground circuits for intermittent continuity or contact faults, then test the sensor against the manufacturer's specification.
Common fixes
- Reseat and secure a loose Sensor B connector.
- Clean or repair corroded Sensor B terminals.
- Repair chafed wiring and secure the harness away from vibration or moving parts.
- Replace Sensor B if its output remains erratic with a sound connector and harness.
Can I keep driving?
If the engine remains smooth, drive only as needed and avoid demanding acceleration until the intermittent signal is repaired. Hesitation or power loss can recur without warning, and poor engine control may raise fuel consumption and emissions.
A code shows where the control module detected a fault, not always which part failed. Check the causes in order and confirm with a test before replacing parts. Have several codes? Check them together
This is a generic code: it means the same on every make. The car’s maker may add more detail in its own service information.