P2446AIR System Pump Stuck On (Bank 2)
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Needs a drive cycle to confirm a fix
- How the car detects it
- P2446 is the bank 2 entry for a secondary air pump that keeps running after being switched off. The code is meaningful only on engines with a separate pump per cylinder bank or where the system reports pump faults per bank; no manufacturer documents this code publicly. By analogy with GM's bank 1 code P2444, the check would run after the pump is commanded off and look for duct pressure that stays above the model, which points to a stuck relay, a shorted driver or a pump with an internal fault. Under CARB rules, AIR pumps, relays and valves count as comprehensive components and need their own monitoring. A pump that never stops can overheat, wear out quickly and load the battery. P2447 is the stuck-off code for bank 2; P2444 covers bank 1.
- What you may notice
- Check engine lamp
- Pump keeps humming after the warm-up phase
- Likely causes
- LikelyRelay of the bank 2 pump stuck closed
- PossibleControl circuit shorted to power
- RareFaulty output driver in the engine computer
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Easy · Often possible to do yourself.Typical cost: €20 – €600
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.