P1129 Honda 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 Honda 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 Honda Description
What are the Possible Causes of the DTC P1129 Honda?
- 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 Honda?
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.
Code Tech Notes
2001 Honda Odyssey
2003 Honda Odyssey
2003 Honda Pilot
Honda Factory Service Bulletin OBDII Code P1129
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P1129 Honda 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 Honda code?
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Need Help with the Code?
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Information for Specific Honda Models
- P1129 2008 Honda Accord — Manifold Absolute Pressure Sensor Circuit Higher Than Expected
- P1129 2009 Honda Accord — Manifold Absolute Pressure Sensor Circuit Higher Than Expected
- P1129 2010 Honda Accord — Manifold Absolute Pressure Sensor Circuit Higher Than Expected
- P1129 1996 Honda Civic — Manifold Absolute Pressure Sensor Circuit Higher Than Expected
- P1129 1997 Honda Civic — Manifold Absolute Pressure Sensor Circuit Higher Than Expected
- P1129 1998 Honda Civic — Manifold Absolute Pressure Sensor Circuit Higher Than Expected
- P1129 1999 Honda Civic — Manifold Absolute Pressure Sensor Circuit Higher Than Expected
- P1129 2000 Honda Civic — Manifold Absolute Pressure Sensor Circuit Higher Than Expected
Frequently Asked Questions about P1129 Honda Code
1. What are common symptoms of OBDII code P1129 in a Honda?
- Common symptoms include rough idling, poor acceleration, engine stalling, and a decrease in fuel efficiency.
2. What causes the OBDII code P1129 in a Honda related to the Manifold Absolute Pressure (MAP) sensor circuit?
- The code is typically triggered when the MAP sensor circuit reports a pressure reading that is higher than expected by the engine control module.
3. How can I diagnose the OBDII code P1129 in my Honda?
- Diagnosing the issue involves checking the MAP sensor and its wiring for any faults or damages. Additionally, inspect the vacuum lines for leaks.
4. Can a dirty or faulty MAP sensor cause the OBDII code P1129 in a Honda?
- Yes, a dirty or faulty MAP sensor can send incorrect pressure readings to the engine control module, triggering the code.
5. What are some repair tips for addressing the OBDII code P1129 in a Honda?
- Start by cleaning the MAP sensor and checking the wiring connections. If the issue persists, consider replacing the MAP sensor.
6. Is it safe to continue driving with the OBDII code P1129 in a Honda?
- It is not recommended to continue driving with this code, as it can lead to further engine performance issues and potential damage if left unresolved.
7. Can a vacuum leak be a possible cause of the OBDII code P1129 in a Honda?
- Yes, a vacuum leak can disrupt the pressure readings received by the MAP sensor, potentially causing the code to trigger.
8. How do I reset the OBDII code P1129 in my Honda after making repairs?
- You can reset the code using an OBDII scanner or by disconnecting the car battery for a few minutes to clear the error code.
9. Are there any specific Honda models known to be prone to experiencing the OBDII code P1129?
- While the code can occur in various Honda models, some vehicles equipped with MAP sensors may be more susceptible to triggering the P1129 code.
10. Can a damaged or disconnected MAP sensor connector cause the OBDII code P1129 in a Honda?
- Yes, a damaged or disconnected MAP sensor connector can disrupt the sensor's communication with the engine control module, leading to the code.
Discuss the causes and fixes for P1129 Honda OBDII Code
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Wash the honda civic 2005 engine and start galling, the scanner signals the code P1129, could you tell me what is the probable failure or what should be done? Thank you
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Such a BS fault and to go into limp mode at 75 MPH is dangerous as hell! Honda should get sued for that limp mode or provide a way to stop it. Nothing is wrong with my Element!!!
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