P0A2B: 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. 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.

Symptoms

• Hybrid system warning or check engine light
• Electric drive power limited
• Motor temperature far off from other temperatures after a cold soak

Most likely causes

• Thermistor drifted out of its resistance curve
• Added resistance from a worn or corroded connector (Audi A7 e quattro)
• Fault in a reference temperature such as inverter or fluid temperature
• Motor cooling problem that makes a real temperature look implausible

What to check, in order

Start with the simplest. You can tick off each step.

1. Read the codes with a hybrid-compatible scanner and write down the freeze frame data
2. Compare the reading with other engine data while varying the engine speed.
3. Make sure the battery cooling air intake is clean
4. Check the 12 V auxiliary battery, which can also trigger warnings
5. Leave any high-voltage measurements to a specialized repair shop

Good to know

• It can trigger limp mode.
• It affects emissions.

What each character of P0A2B means

• P: Powertrain: engine and transmission
• 0: Generic code: same on every make
• A: Hybrid or air and fuel
• 2B: Specific fault in that system

Frequently asked questions

Can I keep driving with code P0A2B?

If the car still runs, drive as little as possible and go to a specialized repair shop. Do not touch the orange cables: they carry high voltage.

What causes code P0A2B?

The most common causes are: thermistor drifted out of its resistance curve; added resistance from a worn or corroded connector (Audi A7 e quattro); fault in a reference temperature such as inverter or fluid temperature.

Related codes

• P0A2ADrive Motor A Temperature Sensor A Circuit
• P0A2CDrive Motor A Temperature Sensor A Circuit Low
• P0A2DDrive Motor A Temperature Sensor A Circuit High
• P0A2FDrive Motor A Over Temperature
• P2DADDrive Motor A Temperature Sensor B Circuit Range/Performance
• P0AEEDrive Motor Inverter Temperature Sensor A Circuit Range/Performance

Sources

• gsi.ext.gm.com: 13OBDG06 Hybrid Diagnostics
• gsi.ext.gm.com: 11OBDG01 HYBRID Diagnostics
• static.nhtsa.gov: SB 10082433 0699
• static.nhtsa.gov: MC 11009400 0001

Values and procedures vary by manufacturer. If it affects brakes, steering, fuel or high voltage, see a professional. Updated: 2026-11-04. How we build these pages.