P0A2B code meaning
Drive Motor A Temperature Sensor A Circuit Range/Performance
Powertrain system Generic code P0Axx codes Check engine light
What P0A2B means
This is the rationality check: after a long soak, motor A's temperature should match other temperatures in the drive. GM compares it with the average inverter module temperature on its 2013 two-mode trucks and sets P0A2B, Type B, if they differ by more than 28 °C after at least 360 minutes off; the 2011 table uses 20 °C against coolant and transmission fluid, the 2013 MGU mild hybrid 25 °C. Hyundai's Sonata Hybrid bulletin lists the code with resistance specs for the NTC; Audi pairs it on the A7 e quattro with P0A2E and a worn connector. McLaren also files over-temperature under P0A2B98. P0A2C/P0A2D are hard electrical faults, P0A2F real heat. Expect reduced electric power.
P0A2B at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyWorkshop only
- Typical labor1 to 12 hours
- Clears after repairAfter a drive cycle
Symptoms of P0A2B
- Hybrid system warning or check engine light
- Electric drive power limited
- Motor temperature far off from other temperatures after a cold soak
Common causes of P0A2B
- Most likelyThermistor drifted out of its resistance curve
- PossibleAdded resistance from a worn or corroded connector (Audi A7 e quattro)
- Less likelyFault in a reference temperature such as inverter or fluid temperature
- Less likelyMotor cooling problem that makes a real temperature look implausible
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 P0A2B 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. |
| 2B | The exact fault in that area. |
What to do next
- Note P0A2B 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 P0A2B
What does P0A2B mean?
P0A2B means "Drive Motor A Temperature Sensor A Circuit Range/Performance". This is the rationality check: after a long soak, motor A's temperature should match other temperatures in the drive. It is a generic code, so it means the same on every make.
Is it safe to drive with P0A2B?
Drive gently and only to a workshop. With P0A2B the car can go into limp mode (reduced power) to protect itself.
Will P0A2B fail an emissions test?
Yes, it can. P0A2B 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 P0A2B to fix?
Difficulty: workshop only. A typical repair takes 1 to 12 hours of work. This is a job for a workshop.
Will P0A2B clear itself after the repair?
After the repair the car has to complete a drive cycle (a mix of city and highway driving) before the test runs again. Until then the readiness monitor shows "not ready", which can fail an inspection.