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AutoCodes - Generic - B1688

B1688 Code - Lamp Dome Input Circuit Short To Ground

- Code Popularity: 17,477 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
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What are the Possible Causes of the DTC B1688?

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
  • Faulty Lamp Dome
  • Lamp Dome harness is open or shorted
  • Lamp Dome circuit poor electrical connection
  • Faulty Smart Junction Box (SJB)
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How to Fix the DTC B1688?

Review the 'Possible Causes' mentioned above and visually examine the corresponding wiring harness and connectors. Ensure to check for any damaged components and inspect the connector pins for signs of being broken, bent, pushed out, or corroded.

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What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B1688 code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to charge between $75 and $150 per hour.

What are Code Possible Symptoms?

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

Code B1688 Description

The Smart Junction Box (SJB) monitors the Lamp Dome Switch. The SJB sets the OBDII code when the Lamp Dome Switch is not to factory specifications.

OBDII Code B1688 - Lamp Dome Input Circuit Short To Ground - AutoCodes.com
B1688 Code - Lamp Dome Input Circuit Short To Ground

Need More Information on the Code?

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Information for Specific Makes

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Code B1688 comments

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