AutoCodes – Honda – P1129 1997 Honda Civic

P1129 1997 Honda Civic 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 1997 Honda Civic 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 4,103

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 1997 Honda Civic 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 1997 Honda Civic - Manifold Absolute Pressure Sensor Circuit Higher Than Expected - AutoCodes.com — P1129 1997 Honda Civic Code - Manifold Absolute Pressure Sensor Circuit Higher Than Expected

What does this mean?

What are the Possible Causes of the DTC P1129 1997 Honda Civic?

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 1997 Honda Civic?

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 1997 Honda Civic 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 1997 Honda Civic code?

Need more information on how to fix the P1129 1997 Honda Civic code? Get Access to Factory Service Manuals

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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 1997 Honda Civic Code

1. What are the common symptoms of OBDII code P1129 on a 1997 Honda Civic?

- Common symptoms include reduced engine power, poor fuel efficiency, stalling, and rough idling.

2. What causes the OBDII code P1129 on a 1997 Honda Civic?

- The code is typically triggered by a faulty manifold absolute pressure (MAP) sensor, vacuum leaks, or issues with the sensor circuit.

3. How can I diagnose the underlying issue causing code P1129 on my 1997 Honda Civic?

- Use a diagnostic scan tool to read the code and check the MAP sensor for proper operation, as well as inspecting for any vacuum leaks in the system.

4. Can a dirty or clogged MAP sensor cause code P1129 on a 1997 Honda Civic?

- Yes, a dirty or clogged MAP sensor can lead to incorrect pressure readings and trigger the P1129 trouble code.

5. What are some repair tips for resolving OBDII code P1129 on a 1997 Honda Civic?

- Try cleaning the MAP sensor first to see if that resolves the issue before considering replacing the sensor or addressing any vacuum leaks.

6. Is it safe to continue driving my 1997 Honda Civic with OBDII code P1129 present?

- It is not recommended to drive the vehicle with the P1129 code active, as it can lead to further engine performance issues and potential damage.

7. How much does it typically cost to repair OBDII code P1129 on a 1997 Honda Civic?

- The cost of repairs can vary depending on the exact cause of the issue, but it may range from $100 for a DIY fix to $300 or more at a repair shop.

8. Can I reset the OBDII code P1129 on my 1997 Honda Civic without fixing the underlying issue?

- While you can clear the code using a scan tool, it will likely return if the root cause of the problem is not addressed.

9. Will fixing OBDII code P1129 on my 1997 Honda Civic improve fuel efficiency?

- Yes, resolving the issue causing the P1129 code can help restore optimal engine performance and improve fuel efficiency.

10. How long does it take to repair OBDII code P1129 on a 1997 Honda Civic?

- The repair time can vary depending on the exact cause of the issue and your level of experience, but it may take anywhere from 30 minutes to a few hours to complete.