P2E7CA/C Compressor Control Module Internal Temperature Sensor B Circuit
- Generic OBD-II code · Powertrain
- How the car detects it
- P2E7C covers the second internal temperature sensor in the control electronics of an electric A/C compressor. Their inverter sits on the housing: a Mitsubishi Heavy Industries patent places a sensor next to the power switches, Denso measures at the switches and at the motor stator, and TI's compressor inverter reference feeds IGBT temperature back for overheat protection. The maker decides what B denotes; GM already uses separate code blocks for its CPU sensor (P0D70) and IGBT sensor (P0D75). No manufacturer documents P2E7C publicly. As the generic circuit code it only says that no usable reading arrives, with neither a low nor a high signal identified. The compressor may limit speed or shut down; since the sensor is soldered to the board, repair normally means a complete compressor.
- What you may notice
- A/C cools weakly or switches off
- On plug-in hybrids and EVs, battery cooling and fast charging may be limited
- Warning message on the climate display; MIL depends on the manufacturer
- Likely causes
- LikelySensor B or its circuit on the compressor control board defective
- PossibleCompressor controller fails to evaluate or transmit the value
- RareUnstable 12 V supply, ground or data link to the compressor
- 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.