P0123: owner reports and bulletins

Powertrain (generic, all makes). We haven't written the explanation for this code yet. Below is what owners and manufacturers have filed with NHTSA.

Got P0123 on your scanner? Tell the mechanic your year, make, model and any symptoms and you'll get the likely cause and what to check first. Ask about this code.

What owners report to NHTSA

16 complaints filed with NHTSA mention P0123, 11 of them since 2015, across 15 different models. The component owners most often filed it under: electrical system.

Manufacturer service bulletins that name P0123

28 technical service bulletins and manufacturer communications filed with NHTSA mention P0123, from 4 makes. A bulletin means the manufacturer has documented a known cause or a fix procedure for that model. Examples:

  • JEEP WRANGLER (2016), bulletin 10121706: Flash: Powertrain Diagnostic And System Enhancements This bulletin involves reprogramming the Powertrain Control Module (PCM) with the latest available software. Customers may experience a Malfunction Indicator Lamp (MIL…
  • DODGE CHARGER (2016), bulletin 10129030: Flash: Powertrain Diagnostic And System Improvements This bulletin involves reprogramming of the Powertrain Control Module (PCM) with the latest software. Customers may experience a Malfunction Indicator Lamp (MIL) illum…
  • DODGE CHALLENGER (2016), bulletin 10135115: Flash: Powertrain Diagnostic And System Improvements This bulletin involves reprogramming of the Powertrain Control Module (PCM) with the latest software. Customers may experience a Malfunction Indicator Lamp (MIL) illum…
  • JEEP GRAND CHEROKEE (2016), bulletin 10136529: Flash: Powertrain Diagnostic And System Enhancements This bulletin involves reprogramming the Powertrain Control Module (PCM) with the latest available software. Customers may experience a Malfunction Indicator Lamp (MIL…
  • CHRYSLER 300 (2015), bulletin 10084055: "FLASH: DIAGNOSTIC AND SYSTEM IMPROVEMENTS THIS BULLETIN INVOLVES REPROGRAMMING OF THE POWERTRAIN CONTROL MODULE (PCM) WITH THE LATEST AVAILABLE SOFTWARE. CUSTOMERS MAY EXPERIENCE ONE OR MORE OF THE FOLLOWING SYMPTOMS AN…
  • MAZDA MAZDA6 (2011, 2012, 2013), bulletin 10097313: SOME VEHICLES MAY EXPERIENCE A MIL ILLUMINATION WITH DTCS P0123 AND/OR P0222 STORED IN MEMORY.DTC P0123: THROTTLE POSITION SENSOR NO.1 CIRCUIT HIGH INPUTDTC P0222: THROTTLE POSITION SENSOR NO.2 CIRCUIT LOW INPUTDTCS P012…

Sources: NHTSA Office of Defects Investigation complaint database and manufacturer communications file, snapshots September 2026. A complaint or bulletin that mentions a code is a report about that vehicle, not a statement that the code has one cause.