Drive Motor Temperature Sensor Circuit High
The P0A33 code indicates that the powertrain control module (PCM) has detected a voltage signal from the drive motor temperature sensor that is higher than the expected range. This sensor monitors the temperature of the electric drive motor to prevent overheating. A high voltage typically means the sensor is reading an extremely high temperature or there is a short to voltage in the circuit. This can lead to reduced motor performance or shutdown to protect the motor.
01. Most Common Causes
- Faulty drive motor temperature sensor
- Short to voltage in the sensor circuit
- Open or high resistance in the sensor ground circuit
- Corroded or damaged wiring/connectors
- Faulty PCM (rare)
02. Symptoms You Will Notice
- Check Engine Light illuminated
- Reduced motor power or performance
- Electric motor overheating
- Vehicle may enter limp mode
03. Step-by-Step Diagnosis
Step 1: Use a scan tool to retrieve the code and freeze frame data.
Step 2: Visually inspect the drive motor temperature sensor and its wiring for damage or corrosion.
Step 3: Test the sensor's resistance at various temperatures and compare to specifications.
Step 4: Check for voltage at the sensor connector; should be around 5V reference. If higher, suspect a short to voltage.
Step 5: If sensor and wiring are okay, test the PCM's ability to read the sensor signal.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended to drive with this code as it can cause the motor to overheat and potentially fail. The vehicle may enter limp mode, limiting speed and power.
How much does it cost to fix?▼
The cost typically ranges from $50 to $150 for diagnosis and sensor replacement, but can be higher if wiring repairs are needed.