Powertrain, generic

P0EBD A/C Refrigerant Temperature Sensor A Circuit High

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

P0EBD means the signal voltage of refrigerant temperature sensor A sits at the top of its range. With the usual NTC thermistor that equals an extremely cold reading, and in practice it points to an open signal path, a disconnected plug or a short to the reference voltage. No manufacturer documents P0EBD publicly. As a comparison for the same kind of sensor, GM's 2012 Volt flags its evaporator refrigerant sensor above 98 percent of the 5 V reference (about 4.9 V) in 40 of 50 samples, Type B, under P0538. Mitsubishi's Outlander PHEV treats a high input lasting 4 seconds as an open circuit. A wrong cold value can block compressor operation. The low-voltage counterpart is P0EBE.

Likely causes

Open signal or ground wire, or unplugged connector
Thermistor open internally
Signal wire shorted to the reference or supply voltage

Symptoms

  • Compressor stays off or A/C output is reduced
  • Implausibly low refrigerant temperature in live data

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€60–400
Time0.5–2 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

ac refrigerant temp sensor ahvac control modulewiring harness

Related codes

P0EBEP0EBCP0EBFP0EC2P0538

References: gsi.ext.gm.com, mitsubishitechinfo.com, law.cornell.edu.