OBD-II code · Powertrain (generic, extended)
P2258 Secondary Air Injection System Control A Circuit High
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 with P2258?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyControl wire shorted to battery
- PossibleOpen relay coil
- Less likelyConnector pins corroded - high contact resistance
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.5–2 h
- Emissions test
- Likely to fail
- After the fix
- A drive cycle is needed before the light stays off
- Parts involved
- Secondary Air Pump, Sai Relay, Sai Wiring
Related codes
- P2260Secondary Air Injection System Control B Circuit High
- P2255O2 Sensor Negative Current Control Circuit High (Bank 2 Sensor 1)
- P2256O2 Sensor Heater Control Circuit Low Bank 1 Sensor 2
- P2257Secondary Air Injection System Control A Circuit Low
- P2259Secondary Air Injection System Control B Circuit Low
- P225ANOx Sensor Calibration Memory (Bank 1 Sensor 1)
- P225BNOx Sensor Calibration Memory (Bank 1 Sensor 2)
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.