Secondary Air Injection System Air Flow/Pressure Sensor Circuit High - Bank 2
What does P2433 mean?
The P2433 code means the vehicle's onboard diagnostic system has detected: Secondary Air Injection System Air Flow/Pressure Sensor Circuit High - Bank 2. This is a low severity code.
Common Symptoms
- Check Engine Light illuminated
- Failed emissions inspection
- No effect on driving performance
- Secondary air injection system fault warning
- Cold start emissions slightly higher
Probable Causes (Ranked by Likelihood)
- Open circuit in secondary air pressure sensor wiring Very High
- Disconnected sensor connector High
- Failed sensor with open internal circuit Moderate
- Broken wire in engine harness to sensor Moderate
Step-by-Step Diagnostic Procedure
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Check if the sensor connector is plugged in securely
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Measure sensor signal voltage (should not be at reference voltage with pump running)
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Inspect wiring for open circuits between ECM and sensor
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Check for rodent damage to engine wiring
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Verify sensor continuity with an ohmmeter
Frequently Asked Questions
Can I drive with code P2433?
Yes, completely safe to drive. This code only affects the secondary air injection monitoring and has no impact on driving.
What causes P2433?
Usually a disconnected sensor connector or open wiring. Check the connector first for a free fix. Rodent damage to wiring is also common.
Is P2433 expensive to fix?
Typically $100 to $400. A disconnected connector costs nothing. Sensor replacement is affordable and straightforward.