P0A2C code meaning
Drive Motor A Temperature Sensor A Circuit Low
Powertrain system Generic code P0Axx codes Check engine light
What P0A2C means
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.
P0A2C at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyWorkshop only
- Typical labor1 to 12 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P0A2C
- Hybrid system warning or check engine light
- Motor temperature shows a very high fixed value in live data
- Electric drive power reduced or disabled
Common causes of P0A2C
- Most likelySensor signal wire shorted to ground
- PossibleThermistor internally shorted (often only with transaxle or motor)
- PossibleChafed extension harness between drive unit and inverter
- Less likelyFaulty sensor input in the inverter/motor control module
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Drive motor aMotor temperature sensor
What each part of P0A2C means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 0 | Generic code: it means the same on every make (SAE standard). |
| A | Area: hybrid propulsion. |
| 2C | The exact fault in that area. |
What to do next
- Note P0A2C and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P0A2C
What does P0A2C mean?
P0A2C means "Drive Motor A Temperature Sensor A Circuit Low". 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. It is a generic code, so it means the same on every make.
Is it safe to drive with P0A2C?
Drive gently and only to a workshop. With P0A2C the car can go into limp mode (reduced power) to protect itself.
Will P0A2C fail an emissions test?
Yes, it can. P0A2C is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is P0A2C to fix?
Difficulty: workshop only. A typical repair takes 1 to 12 hours of work. This is a job for a workshop.
Will P0A2C clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.