P0D75A/C Compressor Control Module Output Driver Temperature Sensor Circuit
- Generic OBD-II code · Powertrain
- How the car detects it
- 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.
- What you may notice
- Air conditioning switched off
- Battery cooling via refrigerant may be limited
- Likely causes
- LikelyTemperature sensor at the IGBT module or its circuit failed
- PossibleSensor value not transmitted correctly to the vehicle
- RareUnstable 12 V supply or ground of the compressor electronics
- Repair
- Workshop only · Usually a job for a workshop.Typical cost: €100 – €2,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.