P0D75 code meaning
A/C Compressor Control Module Output Driver Temperature Sensor Circuit
What P0D75 means
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.
P0D75 at a glance
- Check engine lightUsually not
- Emissions testNot an emissions code
- Limp modeNot expected
- Repair difficultyWorkshop only
- Typical labor1 to 5 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P0D75
- Air conditioning switched off
- Battery cooling via refrigerant may be limited
Common causes of P0D75
- Most likelyTemperature sensor at the IGBT module or its circuit failed
- PossibleSensor value not transmitted correctly to the vehicle
- Less likelyUnstable 12 V supply or ground of the compressor electronics
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Ac compressor cm output driver temp sensorAc compressor module
What each part of P0D75 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 75 | The exact fault in that area. |
What to do next
- Note P0D75 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 P0D75
What does P0D75 mean?
P0D75 means "A/C Compressor Control Module Output Driver Temperature Sensor Circuit". 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. It is a generic code, so it means the same on every make.
Is it safe to drive with P0D75?
P0D75 does not normally turn on the check engine light by itself. Watch for the symptoms above and have it checked soon.
Will P0D75 fail an emissions test?
P0D75 is not an emissions code, so on its own it usually does not fail an emissions test. Other stored codes or a lit check engine light still can.
How hard is P0D75 to fix?
Difficulty: workshop only. A typical repair takes 1 to 5 hours of work. This is a job for a workshop.
Will P0D75 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.