P0EC2 code meaning
A/C Refrigerant Temperature Sensor B Circuit High
What P0EC2 means
With P0EC2 the signal of refrigerant temperature sensor B is stuck near the reference voltage. An NTC thermistor would only get there at extreme cold, so an open circuit somewhere in the loop is far more likely. No manufacturer documents P0EC2 publicly. Mitsubishi's procedure for the analogous evaporator outlet sensor of the Outlander PHEV shows the logic: the A/C amplifier sets its open-circuit code after 4 seconds of high input while READY is on or the battery is charging, and the technician measures about 5 V at the unplugged connector and checks both lines for continuity under 2 ohms. A false cold reading may lock out heating or cooling. Low counterpart: P0EC3.
P0EC2 at a glance
- Check engine lightUsually not
- Emissions testNot an emissions code
- Limp modeNot expected
- Repair difficultyMedium
- Typical labor0.5 to 2 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P0EC2
- Very low refrigerant temperature shown for sensor B
- Heating via heat pump or cooling unavailable
Common causes of P0EC2
- Most likelyOpen signal or ground line between sensor B and module
- PossibleConnector not fully seated after A/C work
- PossibleSensor B open internally
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Ac refrigerant temp sensor bHvac control moduleWiring harness
What each part of P0EC2 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 0 | Generic code: it means the same on every make (SAE standard). |
| C2 | The exact fault in that area. |
What to do next
- Note P0EC2 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 P0EC2
What does P0EC2 mean?
P0EC2 means "A/C Refrigerant Temperature Sensor B Circuit High". With P0EC2 the signal of refrigerant temperature sensor B is stuck near the reference voltage. It is a generic code, so it means the same on every make.
Is it safe to drive with P0EC2?
P0EC2 does not normally turn on the check engine light by itself. Watch for the symptoms above and have it checked soon.
Will P0EC2 fail an emissions test?
P0EC2 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 P0EC2 to fix?
Difficulty: medium. A typical repair takes 0.5 to 2 hours of work. This is a job for a workshop.
Will P0EC2 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.