Code result
P2431
Secondary Air Injection System Air Flow/Pressure Sensor Circuit
Moderate severity
What it means
The ECU detects a general fault in the secondary air injection system air flow or pressure sensor circuit. The diagnostic cannot verify proper SAI operation.
Is it safe to drive?
Use caution
The vehicle is usually drivable for short distances, but the problem can worsen or affect emissions. Diagnose and repair as soon as practical.
Most likely causes
Defective SAI sensor
highOne of the most commonly reported causes for this code — check this first.
SAI sensor wiring fault
mediumA plausible cause — test and verify before replacing parts.
Related help
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