Intake Air Quality Sensor Circuit High (Bank 1)
The P2223 code means the vehicle's onboard diagnostic system has detected: Intake Air Quality Sensor Circuit High (Bank 1). This is a low severity code.
- Keep driving?
- Yes, but fix soon
- DIY difficulty
- moderate
- Estimated cost
- $50 - $250 (parts and labor)
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Common Symptoms
- Check Engine Light on
- No major drivability symptoms
- Possible minor performance variation
- Emissions test failure
- High sensor reading on scan tool
Probable Causes (Ranked by Likelihood)
- Short to voltage in the sensor wiring Very High
- Failed sensor producing high signal output High
- Water intrusion in the sensor connector Moderate
- Damaged wiring near heat source Moderate
- ECM internal circuit fault Low
Step-by-Step Diagnostic Procedure
-
Read the air quality sensor value -- check if pegged at maximum voltage
-
Inspect wiring for shorts to power or heat damage
-
Check the connector for water intrusion or pin damage
-
Disconnect the sensor and verify signal drops
-
Replace the sensor if wiring checks are normal
Frequently Asked Questions
What causes a high circuit reading?
A high circuit reading means the sensor is sending a voltage above the maximum expected threshold, usually from a short to power in the wiring or an internal sensor failure.
Can moisture cause P2223?
Yes, water intrusion into the sensor connector can create a path that raises the signal voltage, triggering a high circuit code.
Is P2223 urgent?
No, P2223 is a low-severity code that does not typically affect drivability. However, it should be repaired to pass emissions testing and ensure accurate air quality monitoring.
Sources
This page is built from documented references. Verify against your own service info before repair work.
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