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B1108 Infiniti Code - Diagnosis Sensor Unit

Quick Answer

The B1108 code for Infiniti vehicles refers to an issue with the Diagnosis Sensor Unit. Common causes include Faulty Diagnosis Sensor Unit, Wiring or connection issues, Corrosion or damage to sensor connectors. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means
B1108 Infiniti indicates Diagnosis Sensor Unit.
Common causes
Common causes include Faulty Diagnosis Sensor Unit, Wiring or connection issues, Corrosion or damage to sensor connectors.
Severity
High - diagnose this code as soon as possible.
Can I drive?
Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
What is this?
Table of contents Created and updated by William Orellana on Sep 14, 2024
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Code B1108 Infiniti Description

The B1108 code for Infiniti vehicles refers to an issue with the Diagnosis Sensor Unit. The Diagnosis Sensor Unit is a crucial component of the vehicle's onboard diagnostic system, responsible for monitoring various systems and sensors in the vehicle. When this unit malfunctions or fails, it can lead to a range of issues affecting the vehicle's performance, safety, and overall functionality.

OBDII Code B1108 Infiniti - Diagnosis Sensor Unit
B1108 Infiniti Code - Diagnosis Sensor Unit

Common Causes of B1108 Infiniti

  1. Faulty Diagnosis Sensor Unit
  2. Wiring or connection issues
  3. Corrosion or damage to sensor connectors
  4. Electrical system malfunctions
  5. Software glitches or programming errors

Symptoms of B1108 Infiniti

  1. Check engine light illuminated on the dashboard
  2. Reduced engine performance or power
  3. Issues with transmission shifting
  4. Poor fuel efficiency
  5. Difficulty starting the vehicle

How to Fix B1108 Infiniti

  1. Begin by using a diagnostic scanner to retrieve the specific trouble code and confirm that it is indeed B1108 related to the Diagnosis Sensor Unit.
  2. Inspect the wiring and connections related to the Diagnosis Sensor Unit for any signs of damage, corrosion, or loose connections. Repair or replace as needed.
  3. Check the Diagnosis Sensor Unit itself for any visible damage or malfunctions. Replace the unit if necessary.
  4. Clear the trouble code from the vehicle's computer using the diagnostic scanner.
  5. Test drive the vehicle to ensure that the issue has been resolved and that the check engine light does not reappear.

Cost to Fix B1108 Infiniti

The typical repair costs for addressing the B1108 code related to the Diagnosis Sensor Unit can vary depending on the specific cause of the issue and the labor rates in your area. On average, you can expect to pay between $200 and $500 for parts and labor. However, it's important to note that labor rates can vary significantly, with rates typically ranging from $80 to $150 per hour at most auto repair shops. It's advisable to check with local shops for a more accurate estimate based on your location and vehicle model.

Need more information about the B1108 Infiniti code?

Need more information on how to fix the B1108 Infiniti code? Get Access to Factory Service Manuals

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Precautions for SRS “AIR BAG” and “SEAT BELT PRE-TENSIONER” Service

  • Never probe the electrical connectors on air bag, side air curtain modules or seat belts.
  • Never disassemble or tamper with safety belt buckle/retractor pretensioners, adaptive load limiting retractors, safety belt inflators, or probe the electrical connectors.
  • Do not use electrical test equipment to check SRS circuits unless instructed to in this Service Manual.
  • Before servicing the SRS, turn ignition switch OFF, disconnect both battery cables and wait at least 3 minutes. For approximately 3 minutes after the cables are removed, it is still possible for the air bag and seat belt pre-tensioner to deploy. Therefore, do not work on any SRS connectors or wires until at least 3 minutes have passed.

Failure to follow this instruction may result in the accidental deployment of these modules, which increases the risk of serious personal injury or death.

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about B1108 Infiniti Code

1. What does OBDII code B1108 for an Infiniti Diagnosis Sensor Unit mean?

The B1108 code indicates a fault in the diagnosis sensor unit in an Infiniti vehicle.

2. What are common symptoms of OBDII code B1108 in an Infiniti?

Common symptoms include issues with the vehicle's diagnostic functions, such as difficulty accessing diagnostic information or inaccurate readings.

3. What are possible causes of OBDII code B1108 in an Infiniti?

Potential causes may include a malfunctioning diagnosis sensor unit, wiring problems, or a faulty connection.

4. How can I diagnose OBDII code B1108 in my Infiniti?

Diagnosing this code typically involves using an OBDII scanner to retrieve the specific diagnostic trouble code and then inspecting the diagnosis sensor unit and related components for any visible issues.

5. Can I drive my Infiniti with OBDII code B1108?

It is generally not recommended to drive your vehicle with an unresolved OBDII code, as it may lead to further damage or safety risks. It's best to address the issue promptly.

6. How can I repair OBDII code B1108 in my Infiniti?

Repairing this code may involve replacing the diagnosis sensor unit, repairing any damaged wiring, or addressing any loose connections.

7. Is it necessary to reset the OBDII code B1108 after repairs?

After resolving the issue causing the B1108 code, it is recommended to clear the code using an OBDII scanner to reset the vehicle's system and ensure the problem has been fixed.

8. How much does it cost to repair OBDII code B1108 in an Infiniti?

The cost of repairing this code can vary depending on the specific issue and the labor rates of the repair shop. It's advisable to get a diagnostic assessment to determine the exact repair cost.

9. Can a DIY enthusiast fix OBDII code B1108 in an Infiniti?

While some experienced DIY enthusiasts may be able to address this code themselves, it's crucial to have the necessary tools, knowledge, and skills to diagnose and repair the issue correctly.

10. How often does OBDII code B1108 occur in Infiniti vehicles?

The occurrence of the B1108 code can vary among different Infiniti models and years. It's essential to address the issue promptly to prevent any further complications.

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