P1129 2008 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 2008 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.
Code P1129 2008 Honda Accord Description
What are the Possible Causes of the DTC P1129 2008 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 2008 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 2008 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 2008 Honda Accord code?
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Frequently Asked Questions about P1129 2008 Honda Accord Code
1. What are common symptoms of OBDII code P1129 in a 2008 Honda Accord?
- Common symptoms include poor engine performance, decreased fuel efficiency, rough idling, and potential stalling.
2. What does the OBDII code P1129 on a 2008 Honda Accord indicate?
- The code P1129 indicates that the Manifold Absolute Pressure (MAP) sensor circuit is reporting higher than expected readings.
3. What are the possible causes of OBDII code P1129 in a 2008 Honda Accord?
- Possible causes include a faulty MAP sensor, issues with the sensor wiring or connectors, intake manifold leaks, or a problem with the engine control module (ECM).
4. How can I diagnose the OBDII code P1129 in my 2008 Honda Accord?
- Diagnosing this code typically involves checking the MAP sensor for proper operation, inspecting the sensor's wiring and connectors, and ensuring there are no leaks in the intake manifold.
5. Can I continue driving my 2008 Honda Accord with the P1129 code?
- It is not recommended to continue driving with the P1129 code present, as it can lead to further engine damage and potential safety risks.
6. How can I repair the OBDII code P1129 in my 2008 Honda Accord?
- Repair options include replacing the faulty MAP sensor, repairing any wiring or connector issues, fixing intake manifold leaks, or reprogramming the ECM if necessary.
7. Will resetting the OBDII code P1129 in my 2008 Honda Accord solve the issue?
- Resetting the code may temporarily turn off the check engine light, but it will not fix the underlying issue causing the P1129 code to trigger.
8. How much does it typically cost to repair the OBDII code P1129 in a 2008 Honda Accord?
- The cost of repairs can vary depending on the exact cause of the issue, but it may range from $100 to $500 or more, including parts and labor.
9. Can a DIY enthusiast repair the OBDII code P1129 in a 2008 Honda Accord?
- Depending on your skill level and access to tools, some DIY enthusiasts may be able to diagnose and repair the P1129 code, especially if it involves simple tasks like sensor replacement or checking for leaks.
10. How often does the OBDII code P1129 occur in a 2008 Honda Accord?
- The occurrence of the P1129 code can vary, but it is not an uncommon issue in 2008 Honda Accords, especially as the vehicle ages and components wear out.
Discuss the causes and fixes for P1129 2008 Honda Accord OBDII Code
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2011 Honda Accord LX- 2.4L
-Replaced PCV valve. Old was original
-While checking air filter-cracked the old tube from Air Filter to throttle body
-Cleaned Throttle body intake area /glued cracked tube and silicone'd it..
TESTED vehicle and it was idling higher than before (1100-1200 rpm) - Check Engine light CAME ON
CODE indicated was 1129.
-Removed and cleaned the Manifold Pressure sensor-RE-INSTALLED and RE-Connected electrical
TESTED vehicle without A/C - It was now idling at about 800 rpm. Idling at about 900 to 1000 rpm with A/C
I'm guessing the computer (ECM) is learning the new idle settings with pcv & clean...
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