P2E7EA/C Compressor Control Module Internal Temperature Sensor B 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
- P2E7E reports that internal temperature sensor B of the A/C compressor controller delivers a signal above its valid range. Most sensors of this kind produce a voltage that falls as temperature rises; TI's compressor inverter reference uses such an analog part, so a high signal stands for an impossibly cold reading. GM applies exactly this to the IGBT sensor of its compressor: P0D77 sets when the reported value falls under −40 °C, in the 2011 Volt after 30 failures within 60 samples taken every 50 ms, provided ambient exceeds −7 °C, in 2018 at a 100 ms rate and in 2019 after 4 of 5 s, always Type B. No manufacturer documents P2E7E. An open sensor path, a cracked solder joint or a lost reference on the board are usual causes. In J2012 this High code precedes the Low code P2E7F.
- What you may notice
- Compressor runs restricted or not at all
- Cabin and, where present, battery cooling weaker
- MIL possible after two drive cycles depending on manufacturer
- Likely causes
- LikelySensor B path open, e.g. cracked solder joint on the board
- PossibleReference or ground of the measuring circuit lost inside the module
- RareAnalog input of the compressor controller defective
- 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.