AutoCodes – Hyundai – P1400 Hyundai

P1400 Hyundai Code - Manifold Differential Pressure Circuit Malfunction

Quick Answer

P1400 Hyundai indicates Manifold Differential Pressure Circuit Malfunction. Common causes include Faulty Manifold Differential Pressure (MDP) sensor, Manifold Differential Pressure (MDP) sensor harness open or shorted, Manifold Differential Pressure (MDP) sensor circuit poor electrical connection. Severity is Moderate - service should be scheduled soon. The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.

What it means: P1400 Hyundai indicates Manifold Differential Pressure Circuit Malfunction.
Common causes: Common causes include Faulty Manifold Differential Pressure (MDP) sensor, Manifold Differential Pressure (MDP) sensor harness open or shorted, Manifold Differential Pressure (MDP) sensor circuit poor electrical connection.
Severity: Moderate - service should be scheduled soon.
Can I drive?: The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 10,205

How popular is this code, among other codes? Low

Repair Importance Level

Moderate (Service soon) (2 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on May 20, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code P1400 Hyundai Description

OBDII Code P1400 Hyundai - Manifold Differential Pressure Circuit Malfunction - AutoCodes.com — P1400 Hyundai Code - Manifold Differential Pressure Circuit Malfunction

What does this mean?

What are the Possible Causes of the DTC P1400 Hyundai?

Faulty Manifold Differential Pressure (MDP) sensor
Manifold Differential Pressure (MDP) sensor harness open or shorted
Manifold Differential Pressure (MDP) sensor circuit poor electrical connection

How to Fix the DTC P1400 Hyundai?

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 P1400 Hyundai 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 P1400 Hyundai code?

Need more information on how to fix the P1400 Hyundai code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1400 Hyundai code diagnosed by a professional: Find a repair shop in your area

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 P1400 Hyundai Code

1. What are common symptoms of OBDII code P1400 in a Hyundai related to the Manifold Differential Pressure Circuit Malfunction?

- Common symptoms include rough idling, decreased engine performance, and illuminated Check Engine Light.

2. What are the possible causes of the Manifold Differential Pressure Circuit Malfunction in a Hyundai triggering OBDII code P1400?

- Causes may include a faulty manifold absolute pressure sensor, vacuum leaks, wiring issues, or a clogged EGR system.

3. How can I diagnose the OBDII code P1400 in a Hyundai related to the Manifold Differential Pressure Circuit Malfunction?

- Diagnose by performing a visual inspection of the sensor and related components, checking for vacuum leaks, testing sensor functionality, and scanning for additional trouble codes.

4. Can driving with the OBDII code P1400 in a Hyundai be harmful to the vehicle?

- Continuing to drive with this code may lead to reduced fuel efficiency, engine performance issues, and potential damage to emissions components over time.

5. What are some repair tips for addressing the Manifold Differential Pressure Circuit Malfunction in a Hyundai showing OBDII code P1400?

- Repair tips may include replacing the faulty sensor, repairing vacuum leaks, cleaning the EGR system, and ensuring proper wiring connections.

6. How much does it typically cost to fix OBDII code P1400 in a Hyundai caused by the Manifold Differential Pressure Circuit Malfunction?

- Repair costs can vary depending on the specific issue, but they may range from $100 to $500 for parts and labor.

7. Can I reset the Check Engine Light after fixing the issue causing OBDII code P1400 in a Hyundai?

- Yes, the Check Engine Light can be reset using an OBDII scanner once the underlying issue triggering the code has been resolved.

8. Is it possible for a DIY enthusiast to address the Manifold Differential Pressure Circuit Malfunction triggering OBDII code P1400 in a Hyundai?

- Depending on the specific cause, some DIY repairs such as sensor replacement or checking for vacuum leaks may be feasible for enthusiasts with the right tools and knowledge.

9. How urgent is it to address OBDII code P1400 in a Hyundai related to the Manifold Differential Pressure Circuit Malfunction?

- While the vehicle may still be operable with this code, it is recommended to address the issue promptly to prevent potential performance issues and further damage.

10. Will fixing the issue causing OBDII code P1400 in a Hyundai pass an emissions test?

- Resolving the Manifold Differential Pressure Circuit Malfunction should improve emissions performance, but it is recommended to verify with an emissions test after repairs are completed.