AutoCodes – GMC – P1408 GMC

P1408 GMC Code - Intake Manifold Pressure Sensor Circuit

Quick Answer

P1408 GMC indicates Intake Manifold Pressure Sensor Circuit. Common causes include Faulty Intake Manifold Pressure Sensor, Intake Manifold Pressure harness is open or shorted, Intake Manifold Pressure 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: P1408 GMC indicates Intake Manifold Pressure Sensor Circuit.
Common causes: Common causes include Faulty Intake Manifold Pressure Sensor, Intake Manifold Pressure harness is open or shorted, Intake Manifold Pressure 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 3,911

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

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Table of contents Created and updated by William Orellana on Aug 20, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1408 GMC Description

OBDII Code P1408 GMC - Intake Manifold Pressure Sensor Circuit - AutoCodes.com — P1408 GMC Code - Intake Manifold Pressure Sensor Circuit

What does this mean?

What are the Possible Causes of the DTC P1408 GMC?

Faulty Intake Manifold Pressure Sensor
Intake Manifold Pressure harness is open or shorted
Intake Manifold Pressure circuit poor electrical connection

How to Fix the DTC P1408 GMC?

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 P1408 GMC 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.

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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 P1408 GMC Code

1. What are the common symptoms of OBDII code P1408 GMC related to the Intake Manifold Pressure Sensor Circuit?

- Common symptoms include rough idling, decreased engine performance, and potential stalling of the vehicle.

2. What are the typical causes of OBDII code P1408 GMC indicating an issue with the Intake Manifold Pressure Sensor Circuit?

- The code can be triggered by a faulty intake manifold pressure sensor, damaged wiring or connectors, or issues with the sensor circuit.

3. How can I diagnose the source of OBDII code P1408 GMC for the Intake Manifold Pressure Sensor Circuit?

- Diagnosing the issue involves checking the sensor's wiring and connectors for damage, testing the sensor itself for proper function, and scanning for any related codes or issues.

4. Can a dirty or clogged intake manifold cause OBDII code P1408 GMC to appear?

- While a dirty or clogged intake manifold might affect engine performance, it is unlikely to directly trigger the P1408 code. Focus on checking the sensor and its circuit first.

5. Are there any quick repair tips for addressing OBDII code P1408 GMC related to the Intake Manifold Pressure Sensor Circuit?

- Quick repair tips include checking and cleaning the sensor connectors, ensuring proper wiring connections, and if needed, replacing the faulty sensor.

6. Can driving with OBDII code P1408 GMC present cause further damage to the vehicle?

- Continuing to drive with the code may lead to decreased engine performance and potential issues, so it's best to address the problem promptly.

7. Is it possible to reset OBDII code P1408 GMC without fixing the underlying issue with the Intake Manifold Pressure Sensor Circuit?

- While clearing the code may temporarily turn off the warning light, the issue causing the code will likely persist and trigger the code again until properly addressed.

8. How can I prevent OBDII code P1408 GMC from appearing in the future after resolving the Intake Manifold Pressure Sensor Circuit issue?

- Regular maintenance, including checking sensor connections and wiring, can help prevent the code from reoccurring in the future.

9. Are there any recalls or technical service bulletins related to OBDII code P1408 GMC and the Intake Manifold Pressure Sensor Circuit?

- It's recommended to check with the manufacturer or authorized service centers for any recalls or bulletins related to this specific code and sensor circuit.

10. Can a DIY enthusiast with basic automotive knowledge fix OBDII code P1408 GMC related to the Intake Manifold Pressure Sensor Circuit?

- Depending on the exact cause, a DIY enthusiast with basic knowledge may be able to address the issue by following diagnostic procedures and replacing the faulty sensor or fixing wiring problems. If unsure, consulting a professional mechanic is advisable.