Code result
P2258
Secondary Air Injection System Control A Circuit High
High severity
What it means
The control circuit A of the secondary air injection system shows a voltage above the calibrated upper threshold. Likely a short to battery voltage or an open in the relay coil/output.
Is it safe to drive?
No — stop driving
This code points to a problem that can cause damage or affect safety. Avoid driving and have the vehicle diagnosed promptly.
Most likely causes
Control wire shorted to battery
highOne of the most commonly reported causes for this code — check this first.
Open relay coil
mediumA plausible cause — test and verify before replacing parts.
Connector pins corroded - high contact resistance
lowLess common, but worth ruling out after the more likely causes.
Related help
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