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Engine-Codes – Buick – P0108 Buick

P0108 Buick Code - Manifold Absolute Pressure/Barometric Pressure Circuit High Input

Quick Answer

The P0108 Buick code indicates a high input from the Manifold Absolute Pressure (MAP) sensor or Barometric Pressure (BARO) sensor circuit. Common causes include Faulty MAP sensor, Faulty BARO sensor, Wiring or connector issues in the sensor circuit. 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
P0108 Buick indicates Manifold Absolute Pressure/Barometric Pressure Circuit High Input.
Common causes
Common causes include Faulty MAP sensor, Faulty BARO sensor, Wiring or connector issues in the sensor circuit.
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 Aug 19, 2024
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Code P0108 Buick Description

The P0108 Buick code indicates a high input from the Manifold Absolute Pressure (MAP) sensor or Barometric Pressure (BARO) sensor circuit. The MAP sensor measures the pressure inside the intake manifold, providing crucial data to the engine control module for fuel delivery and ignition timing. The BARO sensor, on the other hand, measures the atmospheric pressure outside the vehicle. A high input from either sensor can lead to incorrect fuel and ignition settings, impacting the engine's performance and efficiency.

OBDII Code P0108 Buick - Manifold Absolute Pressure/Barometric Pressure Circuit High Input
P0108 Buick Code - Manifold Absolute Pressure/Barometric Pressure Circuit High Input

Common Causes of P0108 Buick

  1. Faulty MAP sensor
  2. Faulty BARO sensor
  3. Wiring or connector issues in the sensor circuit
  4. Vacuum leaks in the intake manifold
  5. Engine mechanical problems affecting pressure readings

Symptoms of P0108 Buick

  1. Loss of power or acceleration
  2. Poor fuel economy
  3. Rough idling or stalling
  4. Check Engine Light illuminated
  5. Increased emissions

How to Fix P0108 Buick

  1. Diagnose the issue using a scan tool to verify the P0108 code and check sensor readings.
  2. Inspect the MAP and BARO sensors, wiring, and connectors for any damage or corrosion.
  3. Test the sensors using a multimeter to ensure they are within the specified resistance values.
  4. Check for vacuum leaks in the intake manifold and repair as necessary.
  5. Clear the code and perform a test drive to verify that the issue has been resolved.

Cost to Fix P0108 Buick

The typical repair costs for addressing a P0108 Buick code can range from $150 to $400, including parts and labor. However, actual costs may vary depending on the location, vehicle make and model, and the specific diagnosis required. It's recommended to consult with a trusted auto repair shop for an accurate estimate based on your vehicle's circumstances.

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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.

Frequently Asked Questions about P0108 Buick Code

1. What does the P0108 code mean for a Buick?

The P0108 code indicates a high voltage input from the Manifold Absolute Pressure (MAP) or Barometric Pressure (BARO) sensor, suggesting a potential issue with the sensor or its circuit.

2. What are the common symptoms of code P0108 on a Buick?

Symptoms may include poor engine performance, decreased fuel efficiency, rough idling, stalling, or the check engine light being illuminated.

3. What causes the P0108 code to be triggered on a Buick?

Common causes include a faulty MAP sensor, damaged wiring or connectors in the MAP sensor circuit, vacuum leaks, or a malfunctioning engine control module (ECM).

4. Can a dirty MAP sensor cause the P0108 code on a Buick?

Yes, a dirty or clogged MAP sensor can provide incorrect readings, potentially triggering the P0108 code.

5. How do I diagnose the P0108 code on my Buick?

Start by inspecting the MAP sensor and its wiring for damage or loose connections. Use a multimeter or diagnostic tool to test the sensor’s voltage output and compare it to manufacturer specifications.

6. Can I drive my Buick with the P0108 code active?

While it may still be drivable, driving with the P0108 code can cause poor performance and fuel inefficiency. It's best to address the issue promptly to prevent further damage.

7. How do I fix the P0108 code on a Buick?

Depending on the diagnosis, fixes may include replacing the MAP sensor, repairing damaged wiring or connectors, cleaning the sensor, or addressing vacuum leaks.

8. Does a vacuum leak cause the P0108 code on a Buick?

Yes, a vacuum leak can result in incorrect MAP sensor readings, contributing to the P0108 code.

9. How much does it cost to fix code P0108 on a Buick?

Costs vary depending on the specific issue, but replacing a MAP sensor typically costs between $100 and $300, including parts and labor.

10. Will clearing the P0108 code fix my Buick?

Clearing the code will temporarily remove it, but if the underlying problem remains unresolved, the code will likely return. Proper diagnosis and repair are necessary.

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