B1231 - Open In The Evaporator Temperature Sensor Circuit

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3   
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Possible causes

  • Faulty Evaporator Temperature Sensor
  • Evaporator Temperature Sensor harness is open or shorted
  • Evaporator Temperature Sensor circuit poor electrical connection
  • Faulty Climate Control Unit

Possible symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)

B1231 Description

The Climate Control Unit monitors the Evaporator Temperature Sensor. The Climate Control Unit sets the OBDII code when the Evaporator Temperature Sensor is not to factory specifications.
OBDII Code B1231 - Open In The Evaporator Temperature Sensor Circuit - AutoCodes.com

B1231 Information for specific makes

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B1231 Comments

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