The output driver temperature sensor watches the power transistors (IGBTs) that switch the three motor phases of an electric A/C compressor; they heat up under load, and the compressor reduces speed or stops before they overheat. P0D75 is the general circuit code for this sensor without a defined low or high value. No manufacturer documents P0D75 publicly; GM's Volt and ELR use P0D76 to P0D78 for the same sensor and mention P0D79 in enable conditions. A Denso patent on hybrid compressor control describes throttling the compressor when the IGBT module runs hot, which is why losing this signal normally halts it. CARB requires such thermal-management inputs to be monitored. The sensor is built into the inverter, so repair usually means a new compressor.
Medium severity. Can I keep driving?It depends on the symptoms. If the car is running normally you can go to a repair shop; if it goes into limp mode, drive as little as possible.
Symptoms
- Air conditioning switched off
- Battery cooling via refrigerant may be limited
Most likely causes
- Temperature sensor at the IGBT module or its circuit failed
- Sensor value not transmitted correctly to the vehicle
- Unstable 12 V supply or ground of the compressor electronics
What to check, in order
Start with the simplest. You can tick off each step.
What each character of P0D75 means
- P: Powertrain: engine and transmission
- 0: Generic code: same on every make
- D: Subsystem depends on the code range
- 75: Specific fault in that system
Frequently asked questions
Can I keep driving with code P0D75?
It depends on the symptoms. If the car is running normally you can go to a repair shop; if it goes into limp mode, drive as little as possible.
What causes code P0D75?
The most common causes are: temperature sensor at the IGBT module or its circuit failed; sensor value not transmitted correctly to the vehicle; unstable 12 V supply or ground of the compressor electronics.
Related codes
- P0D76A/C Compressor Control Module Output Driver Temperature Sensor Performance
- P0D77A/C Compressor Control Module Output Driver Temperature Sensor Circuit High
- P0D78A/C Compressor Control Module Output Driver Temperature Sensor Circuit Low
- P0D79A/C Compressor Control Module Output Driver Temperature Sensor Circuit Intermittent/Erratic
- P0D70A/C Compressor Control Module Internal Temperature Sensor A Circuit
Sources
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.