P0D72A/C Compressor Control Module Internal Temperature Sensor A Circuit High
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Needs a drive cycle to confirm a fix
- How the car detects it
- P0D72 is the high-signal circuit code for the compressor module's internal temperature sensor. With the usual NTC thermistor a high signal means the reading looks extremely cold, and that is how GM defines it: every Volt and ELR table from 2011 to 2019 sets it when the reported CPU temperature is below −40 °C. Timing is 30 of 60 samples at 50 ms in the first-generation Volt, 40 of 50 at 100 ms in 2016 and 4 of 5 s in 2019, each Type B with MIL after two trips; the older tables only check with outside air above −7 °C. In the J2012 list this High code comes before the Low code P0D73. Typical cause is an open sensor path or a cracked solder joint on the compressor board, so the assembly is usually replaced.
- What you may notice
- Check engine light after two trips
- Air conditioning limited or switched off
- Likely causes
- LikelyOpen circuit in the internal temperature sensor path
- PossibleCracked solder joint on the compressor electronics board
- RareFaulty value transmission to the host controller
- 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.