Engine-Codes - Generic - B0401

B0401 Code - M Collation NG

- Code Popularity: 915 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
Table of contents

|What are the Possible Causes of the Code B0401?

  • Incorrect Immobilizer Key
  • Immobilizer Key Not Programmed
  • Faulty Body Integrated Unit (BIU)

|How to Fix the B0401 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 Code B0401?

Labor: 1.0

The cost to diagnose the B0401 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.

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|What are Code B0401 Possible Symptoms?

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

|What Does the B0401 Code Mean?

The Immobilizer system performs the starter relay control. The Body Integrated Unit (BIU) detects the inconformity of reference code, immediately output the starter relay cut signal to Engine Control Module (ECM), and then ECM stops the starter relay operation. In this case, engine does not start, and DTC is not recorded in ECM. Check that the engine does not start on the DTC of body integrated unit.

B0401 Code - M Collation NG

|Need more Information on the B0401 Code?

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|Code B0401 Information for Specific Makes

|Need Help with the B0401 Code?

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