B1846 - Ignition Tamper Circuit Open

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

  • Faulty Ignition Switch
  • Ignition Switch harness is open or shorted
  • Ignition Switch circuit poor electrical connection
  • Faulty Body Control Module (BCM)

Possible symptoms

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

B1846 Description

The Body Control Module (BCM) monitors the Ignition Switch. The BCM sets the OBDII code when the Ignition Switch is not to factory specifications.
OBDII Code B1846 - Ignition Tamper Circuit Open - AutoCodes.com

B1846 Information for specific makes

  • B1846 LEXUS Open In Curtain Shield Squib Left 2nd Step Circuit
  • B1846 SCION Open In Curtain Shield Squib Left 2nd Step Circuit
  • B1846 TOYOTA Open In Curtain Shield Squib Left 2nd Step Circuit

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Related Information

B1846 Comments

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