P0A2CDrive Motor A Temperature Sensor A Circuit Low
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- The motor A sensor is an NTC thermistor, so its signal voltage falls as the winding heats; Hyundai's Sonata Hybrid bulletin gives about 11 to 13 kOhm at 20 °C for 2014-15 units. P0A2C means the voltage is too low, which the module reads as an impossibly hot motor: GM sets it on 2013 two-mode trucks above 230 °C (near 0 V), Type B, two trips; the 2011 table uses 184 °C, the 2013 MGU mild hybrid 236 °C. The usual cause is a signal wire shorted to ground or a shorted sensor. P0A2D is the opposite fault, P0A2F a real over-temperature that only counts while the sensor is in range. Hyundai reports a stuck 417 °F reading as a circuit fault. The driver sees a warning and derated electric drive.
- What you may notice
- Hybrid system warning or check engine light
- Motor temperature shows a very high fixed value in live data
- Electric drive power reduced or disabled
- Likely causes
- LikelySensor signal wire shorted to ground
- PossibleThermistor internally shorted (often only with transaxle or motor)
- PossibleChafed extension harness between drive unit and inverter
- RareFaulty sensor input in the inverter/motor control module
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Workshop only · Usually a job for a workshop.Typical cost: €150 – €4,000
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.