P1128 2010 Honda Accord Code - Manifold Absolute Pressure Sensor Signal Lower Than Expected
Quick Answer
The Manifold Absolute Pressure (MAP) sensor senses manifold absolute pressure (vacuum) and converts it into electrical signals. Common causes include Engine mechanical condition, Faulty Manifold Absolute Pressure (MAP) sensor, Manifold Absolute Pressure (MAP) sensor harness is open or shorted. 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
- P1128 2010 Honda Accord indicates Manifold Absolute Pressure Sensor Signal Lower Than Expected.
- Common causes
- Common causes include Engine mechanical condition, Faulty Manifold Absolute Pressure (MAP) sensor, Manifold Absolute Pressure (MAP) sensor harness is open or shorted.
- 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 P1128 2010 Honda Accord Description
The Engine Control Module (ECM) compares a predetermined MAP value at a given throttle position and manifold absolute pressure to the output voltage value of the MAP sensor.
If the MAP sensor outputs lower voltage than expected, the ECM detects a malfunction and stores a DTC.
What are the Possible Causes of the DTC P1128 2010 Honda Accord?
- Engine mechanical condition
- Faulty Manifold Absolute Pressure (MAP) sensor
- Manifold Absolute Pressure (MAP) sensor harness is open or shorted
- Manifold Absolute Pressure (MAP) sensor circuit poor electrical connection
How to Fix the DTC P1128 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 P1128 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 P1128 2010 Honda Accord code?
Need more information on how to fix the P1128 2010 Honda Accord code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P1128 2010 Honda Accord code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P1128 2010 Honda Accord Code
1. What are the common symptoms of OBDII code P1128 in a 2010 Honda Accord?
- Common symptoms include poor engine performance, rough idling, decreased fuel efficiency, and potential stalling or hesitation while driving.
2. What could cause the Manifold Absolute Pressure (MAP) sensor signal to be lower than expected in a 2010 Honda Accord?
- Possible causes include a faulty MAP sensor, a vacuum leak in the intake manifold, a clogged air filter, or issues with the EGR system.
3. How can I diagnose the issue causing OBDII code P1128 in my 2010 Honda Accord?
- You can start by checking the MAP sensor's wiring and connectors for any damage or corrosion. Perform a vacuum leak test, inspect the intake system, and consider testing the EGR system for proper functioning.
4. Can I drive my 2010 Honda Accord with OBDII code P1128?
- It is not recommended to drive your vehicle with this code as it can lead to further engine damage and potential safety hazards. It's best to address the underlying issue promptly.
5. What is the typical repair process for OBDII code P1128 in a 2010 Honda Accord?
- The typical repair process involves identifying the root cause, which could be a faulty MAP sensor, vacuum leak, air filter replacement, or EGR system repair. Once identified, the necessary part or system should be repaired or replaced.
6. Is it possible to reset OBDII code P1128 in a 2010 Honda Accord without fixing the underlying issue?
- While you can clear the code temporarily, it is likely to reappear if the underlying issue is not addressed. It's crucial to diagnose and repair the root cause of the problem to prevent further issues.
7. How much does it cost to fix OBDII code P1128 in a 2010 Honda Accord?
- The cost of repair can vary depending on the specific cause of the code. Repairs could range from a simple sensor replacement to more extensive work on the intake or EGR system. It's best to consult a mechanic for an accurate estimate.
8. Can a DIY enthusiast fix OBDII code P1128 in a 2010 Honda Accord?
- Depending on your skill level and access to tools, some DIY enthusiasts may be able to address the issue themselves. However, it's essential to have the proper knowledge and tools to diagnose and repair the problem correctly.
9. Will ignoring OBDII code P1128 cause further damage to my 2010 Honda Accord?
- Ignoring this code can lead to decreased engine performance, reduced fuel efficiency, and potential damage to other engine components over time. It's advisable to address the issue promptly to prevent further damage.
10. How often does OBDII code P1128 occur in a 2010 Honda Accord?
- While the frequency may vary, this code can occur due to various factors affecting the MAP sensor signal. Regular maintenance and prompt attention to any warning lights can help prevent this issue from occurring frequently.
Discuss the causes and fixes for P1128 2010 Honda Accord OBDII Code
Code P1128 2010 Honda Accord comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
