Drive Motor Over Temperature
The P0A35 code indicates that the drive motor temperature has exceeded the safe operating threshold. This is typically detected by a temperature sensor within the motor assembly. Overheating can be caused by excessive load, cooling system failure, or electrical issues. If not addressed, it may lead to permanent motor damage or reduced performance.
1. Symptoms You Will Notice
- Check Engine Light illuminated
- Reduced motor power or limp mode
- Overheating warning on dashboard
- Unusual smells (burning) from motor area
2. Most Common Causes
- Low coolant level in the motor/inverter cooling circuit
- Faulty electric water pump for the motor cooling circuit
- Clogged or restricted radiator or heat exchanger
- Motor 'B' temperature sensor or circuit shorted/open (false high reading)
- Internal failure of motor 'B' (winding insulation, bearings, magnetic drag)
- Fault in the inverter/power converter associated with motor 'B' (overheated IGBTs)
- Extended driving under extreme load (towing, steep grades) exceeding thermal limits
3. Step-by-Step Diagnosis
Step 1: Scan for additional codes and check freeze frame data.
Step 2: Inspect cooling system: coolant level, pump operation, and lines for leaks or blockages.
Step 3: Test motor temperature sensor resistance and compare to specifications.
Step 4: Check for excessive load conditions and review driving history.
4. Frequently Asked Questions
Is it safe to drive with this code?▼
No, driving with an overheated motor can cause permanent damage. Stop driving and have the vehicle towed to a repair shop.
How much does it cost to fix?▼
Diagnosis typically costs $50-$150. Repairs vary: coolant flush $100-$200, sensor replacement $150-$300, motor replacement $1,000-$3,000.
5. Commonly Affected Makes
This is a generic OBD2 code, potentially applicable to any manufacturer using this diagnostic standard.