Engine-CodesChevrolet – P1108 Chevrolet

P1108 Chevrolet Code - BARO to MAP Sensor Comparison Too High

Quick Answer

The P1108 diagnostic trouble code in Chevrolet vehicles indicates a problem with the comparison between the Barometric (BARO) pressure sensor and the Manifold Absolute Pressure (MAP) sensor. Common causes include Faulty BARO sensor, Faulty MAP sensor, Vacuum leak in the intake system. 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
P1108 Chevrolet indicates BARO to MAP Sensor Comparison Too High.
Common causes
Common causes include Faulty BARO sensor, Faulty MAP sensor, Vacuum leak in the intake system.
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.
Table of contents Created and updated by William Orellana on Sep 08, 2024
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Code P1108 Chevrolet Description

The P1108 diagnostic trouble code in Chevrolet vehicles indicates a problem with the comparison between the Barometric (BARO) pressure sensor and the Manifold Absolute Pressure (MAP) sensor. The BARO sensor measures the ambient air pressure outside of the engine, while the MAP sensor measures the pressure inside the intake manifold. These two sensors work together to ensure the engine is receiving the correct amount of air for optimal performance and fuel efficiency. When the comparison between these two sensors is too high, it means that there is an inconsistency in the pressure readings, which can lead to various issues with the engine's performance.

OBDII Code P1108 Chevrolet - BARO to MAP Sensor Comparison Too High
P1108 Chevrolet Code - BARO to MAP Sensor Comparison Too High

Common Causes of P1108 Chevrolet

  1. Faulty BARO sensor
  2. Faulty MAP sensor
  3. Vacuum leak in the intake system
  4. Clogged air filters
  5. Wiring issues in the sensor circuitry

Symptoms of P1108 Chevrolet

  1. Decreased fuel efficiency
  2. Loss of power
  3. Rough idling or engine misfires
  4. Stalling or hesitation during acceleration
  5. Illumination of the check engine light

How to Fix P1108 Chevrolet

  1. Diagnose the specific cause of the issue using a diagnostic scanner and multimeter.
  2. Inspect the BARO and MAP sensors for any signs of damage or malfunction and replace if necessary.
  3. Check for vacuum leaks in the intake system and repair or replace any damaged components.
  4. Replace clogged air filters with new ones to ensure proper airflow.
  5. Test the sensor circuitry for any wiring issues and repair or replace as needed.

Cost to Fix P1108 Chevrolet

The cost of repairing the BARO to MAP sensor comparison too high code can vary depending on the specific cause of the issue and the labor rates in your area. On average, the cost of parts for this repair can range from $50 to $200, while the labor costs can range from $100 to $300. It's important to note that these are rough estimates, and actual costs may vary based on factors such as the vehicle make and model, the location of the repair shop, and the extent of the damage. It's recommended to consult with a professional mechanic for a more accurate cost estimate.

When is the Code Detected?

If the Powertrain Control Module (PCM) detects a Manifold Absolute Pressure (MAP) sensor signal voltage that is high, the P1107 code will set.

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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.

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