B1857 - Climate Control On/Off Switch Circuit Failure

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

  • Faulty Climate Control On/Off Switch
  • Climate Control On/Off Switch harness is open or shorted
  • Climate Control On/Off Switch circuit poor electrical connection
  • Faulty Body Control Module (BCM)

Possible symptoms

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

B1857 Description

The Body Control Module (BCM) monitors the Climate Control On/Off Switch. The BCM sets the OBDII code when the Climate Control On/Off Switch is not to factory specifications.
OBDII Code B1857 - Climate Control On/Off Switch Circuit Failure - AutoCodes.com

B1857 Information for specific makes

  • B1857 LEXUS Short To Ground In Rear Side Squib Left Circuit
  • B1857 SCION Short To Ground In Rear Side Squib Left Circuit
  • B1857 TOYOTA Short To Ground In Rear Side Squib Left Circuit

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B1857 Comments

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