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AutoCodes - Generic - B2456

B2456 Code - Auxiliary Heater Coolant Sensor Circuit Short to Ground

- Code Popularity: 4,018 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
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By - Updated Dec 08, 2019
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|Code B2456 Possible Causes

  • Faulty Auxiliary Heater Coolant Sensor
  • Auxiliary Heater Coolant Sensor harness is open or shorted
  • Auxiliary Heater Coolant Sensor circuit poor electrical connection

|How do I Fix the Code B2456?

Check 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.

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|What is the Cost to Diagnose the Code B2456?

Labor: 1.0

The cost of diagnosing the B2456 code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle's make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.

|What are Code B2456 Possible Symptoms?

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

|Code B2456 Description

The Powertrain Control Module (PCM) monitors the Auxiliary Heater Coolant Sensor. The PCM sets the OBDII code when the Auxiliary Heater Coolant Sensor is not to factory specifications.

OBDII Code B2456 - Auxiliary Heater Coolant Sensor Circuit Short to Ground -
B2456 Code - Auxiliary Heater Coolant Sensor Circuit Short to Ground

|Need More Information on the B2456 Code?

Need more information on how to fix the B2456 code? Get Access to Factory Service Manuals

|Need Help with the B2456 Code?

Get the B2456 code diagnosed by a professional: Find a repair shop in your area

|Code B2456 comments

Help us improve Leave a comment below or tell us if the information above helps you fix the code. What are the symptoms on your vehicle for the B2456 code? Have you replaced any parts?
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