AutoCodes – Honda – P1129 2010 Honda Accord

P1129 2010 Honda Accord Code - Manifold Absolute Pressure Sensor Circuit Higher Than Expected

Quick Answer

The Manifold Αbsolute Pressure (MΑP) sensor generates a signal that is proportional to the amount of vacuum in the intake manifold. Common causes include Faulty Manifold Absolute Pressure Sensor, Manifold Absolute Pressure Sensor harness is open or shorted, Manifold Absolute Pressure 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: P1129 2010 Honda Accord indicates Manifold Absolute Pressure Sensor Circuit Higher Than Expected.
Common causes: Common causes include Faulty Manifold Absolute Pressure Sensor, Manifold Absolute Pressure Sensor harness is open or shorted, Manifold Absolute Pressure 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 5,531

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 27, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1129 2010 Honda Accord Description

The Manifold Αbsolute Pressure (MΑP) sensor generates a signal that is proportional to the amount of vacuum in the intake manifold. The signal is sent to the Engine Control Mudule (ECM) and the information is used to control the air/fuel mixture ratio. Faulty MΑP sensor can cuase the engine to stall, surge or a rough idle.

OBDII Code P1129 2010 Honda Accord - Manifold Absolute Pressure Sensor Circuit Higher Than Expected - AutoCodes.com — P1129 2010 Honda Accord Code - Manifold Absolute Pressure Sensor Circuit Higher Than Expected

What does this mean?

What are the Possible Causes of the DTC P1129 2010 Honda Accord?

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

How to Fix the DTC P1129 2010 Honda Accord?

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 P1129 2010 Honda Accord 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 P1129 2010 Honda Accord code?

Need more information on how to fix the P1129 2010 Honda Accord code? Get Access to Factory Service Manuals

Need Help with the 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 P1129 2010 Honda Accord Code

1. What are the common symptoms of OBDII code P1129 in a 2010 Honda Accord?

The common symptoms of code P1129 include reduced engine performance, decreased fuel efficiency, and potential stalling or rough idling.

2. What does the OBDII code P1129 for a 2010 Honda Accord mean?

Code P1129 indicates that the Manifold Absolute Pressure (MAP) sensor circuit is detecting a higher pressure than expected, potentially leading to engine performance issues.

3. What are the possible causes of OBDII code P1129 in a 2010 Honda Accord?

Potential causes of code P1129 include a faulty MAP sensor, issues with the sensor wiring or connector, vacuum leaks, or problems with the intake manifold.

4. How can I diagnose the OBDII code P1129 in my 2010 Honda Accord?

Diagnosing code P1129 may involve visually inspecting the MAP sensor and its connections, checking for vacuum leaks, testing the sensor's voltage, and using a scan tool to monitor sensor data.

5. Can I drive my 2010 Honda Accord with OBDII code P1129?

It is not recommended to drive your vehicle with an active P1129 code, as it can lead to further engine damage or safety issues. It's best to address the problem promptly.

6. How can I repair OBDII code P1129 in my 2010 Honda Accord?

Repairing code P1129 may involve replacing the MAP sensor, repairing any damaged wiring or connectors, fixing vacuum leaks, or addressing any intake manifold issues.

7. Will resetting the OBDII code P1129 in my 2010 Honda Accord make it go away?

Resetting the code may temporarily turn off the check engine light, but if the underlying issue causing P1129 is not addressed, the code is likely to return.

8. Can a DIY enthusiast fix OBDII code P1129 in a 2010 Honda Accord?

Depending on your skill level and access to tools, some DIY enthusiasts may be able to diagnose and repair code P1129. However, seeking professional help is recommended for accurate diagnosis and proper repairs.

9. How much does it cost to fix OBDII code P1129 in a 2010 Honda Accord?

The cost of fixing code P1129 can vary depending on the specific cause of the issue and whether you choose to repair it yourself or take it to a mechanic. Costs may include parts and labor.

10. How often does OBDII code P1129 occur in a 2010 Honda Accord?

Code P1129 is not a common code in the 2010 Honda Accord, but it can still occur due to various factors affecting the MAP sensor circuit.