P0A30 code meaning
Drive Motor B Temperature Sensor Circuit
Powertrain system Generic code P0Axx codes Check engine light
What P0A30 means
P0A30 is the general circuit code for the temperature sensor in the second traction motor (motor B). It is meant for faults the control unit can see on the sensor line but cannot classify as too low, too high or implausible. No manufacturer documents P0A30 publicly; GM two-mode hybrids and Mitsubishi (rear motor of the 2023 Outlander PHEV) use the specific codes P0A31 to P0A33 for the same sensor instead. CARB 1968.2 requires hybrid components whose failure can affect emissions to be monitored for circuit faults. Without a valid winding temperature the motor cannot be protected against overheating, so the system usually cuts electric drive power and lights a hybrid warning.
P0A30 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyWorkshop only
- Typical labor1 to 6 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P0A30
- Hybrid system warning or check engine light
- Reduced electric drive power
- Motor B temperature missing or implausible in live data
Common causes of P0A30
- Most likelyLoose, corroded or damaged connector between motor B and its control module
- PossibleChafed or broken sensor wiring at the drive unit
- PossibleThermistor in the motor winding failed (often only replaceable with the motor)
- Less likelyFaulty sensor input in the 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 b temp sensorWiring harnessHybrid control module
What each part of P0A30 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. |
| 30 | The exact fault in that area. |
What to do next
- Note P0A30 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 P0A30
What does P0A30 mean?
P0A30 means "Drive Motor B Temperature Sensor Circuit". P0A30 is the general circuit code for the temperature sensor in the second traction motor (motor B). It is a generic code, so it means the same on every make.
Is it safe to drive with P0A30?
Drive gently and only to a workshop. With P0A30 the car can go into limp mode (reduced power) to protect itself.
Will P0A30 fail an emissions test?
Yes, it can. P0A30 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 P0A30 to fix?
Difficulty: workshop only. A typical repair takes 1 to 6 hours of work. This is a job for a workshop.
Will P0A30 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.