Engine-Codes - Generic - B1231

B1231 Code - Open In The Evaporator Temperature Sensor Circuit

- Code Popularity: 27,964 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
Table of contents

|What are the Possible Causes of the Code B1231?

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

|How to Fix the B1231 Code?

Start by checking the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.

|What is the Cost to Diagnose the Code B1231?

Labor: 1.0

The cost to diagnose the B1231 code is 1.0 hour of labor. The auto repair's diagnosis time and labor rates vary by location, vehicle's make and model, and even your engine type. Most auto repair shops charge between $75 and $150 per hour.

Does your Car have Safety Recalls? → Check here

|What are Code B1231 Possible Symptoms?

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

|What Does the B1231 Code Mean?

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.

B1231 Code - Open In The Evaporator Temperature Sensor Circuit

|Need more Information on the B1231 Code?

Need more information on how to fix the B1231 code? Get Access to Factory Service Manuals

|Code B1231 Information for Specific Makes

|Need Help with the B1231 Code?

Get the B1231 code diagnosed by a professional: Find a repair shop in your area