AutoCodes – Isuzu – P1108 Isuzu

P1108 Isuzu Code - Barometric Pressure Circuit Input High

Quick Answer

The Manifold Absolute Pressure (MAP) sensor provides instantaneous manifold pressure information to the engine's Engine Control Module (ECM). Common causes include Faulty Manifold Absolute Pressure (MAP) sensor, Manifold Absolute Pressure (MAP) sensor harness is open or shorted, Manifold Absolute Pressure (MAP) sensor circuit poor electrical connection. 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 Isuzu indicates Barometric Pressure Circuit Input High.
Common causes: Common causes include Faulty Manifold Absolute Pressure (MAP) sensor, Manifold Absolute Pressure (MAP) sensor harness is open or shorted, Manifold Absolute Pressure (MAP) sensor circuit poor electrical connection.
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.

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Code Popularity 3,526

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Apr 19, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1108 Isuzu Description

The Manifold Absolute Pressure (MAP) sensor provides instantaneous manifold pressure information to the engine's Engine Control Module (ECM). The data is used to calculate air density and determine the engine's air mass flow rate, which in turn determines the required fuel metering for optimum combustion. A fuel-injected engine may alternately use a Mass Air Flow (MAF) sensor to detect the intake airflow. A typical configuration employs one or the other, but seldom both.The MAP/BARO Switch solenoid valve switches it's air flow passage according to the voltage signal sent from the ECM.

OBDII Code P1108 Isuzu - Barometric Pressure Circuit Input High - AutoCodes.com — P1108 Isuzu Code - Barometric Pressure Circuit Input High

What does this mean?

What are the Possible Causes of the DTC P1108 Isuzu?

Faulty Manifold Absolute Pressure (MAP) sensor
Manifold Absolute Pressure (MAP) sensor harness is open or shorted
Manifold Absolute Pressure (MAP) sensor circuit poor electrical connection

How to Fix the DTC P1108 Isuzu?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P1108 Isuzu code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the P1108 Isuzu code?

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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 P1108 Isuzu Code

1. What does the OBDII code P1108 mean on an Isuzu vehicle?

P1108 indicates that the Barometric Pressure (BARO) sensor is detecting a voltage input that is too high, suggesting an issue with the sensor or its circuit.

2. What are the common symptoms of code P1108 in an Isuzu?

Symptoms may include poor engine performance, decreased fuel efficiency, rough idling, difficulty starting, or the Check Engine Light illuminating.

3. What causes the P1108 code to appear on an Isuzu?

Common causes include a faulty BARO sensor, damaged or corroded wiring, poor electrical connections, or a malfunctioning Engine Control Module (ECM).

4. Can a dirty air filter trigger the P1108 code?

No, a dirty air filter is unlikely to cause this code, as it relates specifically to the BARO sensor and its electrical circuit.

5. How is the P1108 code diagnosed?

A technician will use a scan tool to confirm the code, inspect the BARO sensor and its wiring for damage, and check the sensorâ€™s voltage readings compared to manufacturer specifications.

6. Can I drive my Isuzu with the P1108 code active?

While the vehicle may still operate, driving with this code active can lead to poor engine performance and increased emissions. Itâ€™s best to address the issue promptly.

7. How do you fix the P1108 code on an Isuzu?

Repairs may involve replacing the BARO sensor, repairing or replacing damaged wiring, cleaning electrical connections, or reprogramming the ECM if necessary.

8. How much does it cost to repair the P1108 code on an Isuzu?

Repair costs can vary but typically range from $100 to $300, depending on whether the BARO sensor or wiring needs replacement and labor rates in your area.

9. Can a failing MAP sensor cause the P1108 code on an Isuzu?

The P1108 code is specific to the BARO sensor, not the MAP sensor. However, both sensors share some functions, so a MAP sensor issue could potentially affect BARO sensor readings.

10. Does clearing the P1108 code fix the problem?

Clearing the code will temporarily turn off the Check Engine Light, but if the underlying issue isnâ€™t fixed, the code will return. Proper diagnosis and repair are necessary.