Engine-Codes - Generic - B1128

B1128 Code - Driver Side Door Lock Switch Signal Error

- Code Popularity: 1,773 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
Table of contents

|What are the Possible Causes of the B1128 Code?

  • Faulty Driver Side Door Lock Switch
  • Driver Side Door Lock Switch harness is open or shorted
  • Driver Side Door Lock Switch circuit poor electrical connection
  • Faulty Door Multiplex Control Unit

|How to Fix the B1128 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 B1128 code?

Labor: 1.0

The cost to diagnose the B1128 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.

|What are B1128 code possible symptoms?

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

|What Does the B1128 Code Mean?

The Door Multiplex Control Unit monitors the Driver Side Door Lock Switch. The Door Multiplex Control Unit sets the OBDII code when the Driver Side Door Lock Switch is not to factory specifications.

Driver Side Door Lock Switch Signal Error

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|B1128 code information for specific makes

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