Where is the ICP sensor located

Hi, this is Bo, an auto expert on RepairPal's Car Genius team! I think there’s a little mix-up here—your 2018 Silverado 1500 doesn’t have an **ICP (Injection Control Pressure) sensor** like a diesel would. But your **P2238 code** points to an issue with the **oxygen sensor (O2 sensor) circuit**, specifically the **bank 1 sensor 1** (the upstream sensor on the driver’s side). If your truck won’t start, the O2 sensor alone shouldn’t be the cause—there may be a bigger electrical or fuel-related issue. Double-check battery voltage, fuses, and grounds before replacing parts. If you’re still stuck, a scan tool with live data can help pinpoint what’s really going on. If you need any further advice or want help finding a trusted RepairPal shop in your area, please feel free to call us at 877-913-1554.