P1128 1996 Honda Civic 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 1996 Honda Civic 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 1996 Honda Civic 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 1996 Honda Civic?
- 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 1996 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 P1128 1996 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.
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Frequently Asked Questions about P1128 1996 Honda Civic Code
1. What are the common symptoms of OBDII code P1128 on a 1996 Honda Civic?
- Common symptoms of P1128 include poor engine performance, rough idling, decreased fuel efficiency, and potential stalling.
2. What are the possible causes of OBDII code P1128 in a 1996 Honda Civic?
- The most common causes of P1128 in a 1996 Honda Civic are a faulty manifold absolute pressure (MAP) sensor, vacuum leaks, or a problem with the intake system.
3. How can I diagnose the OBDII code P1128 on my 1996 Honda Civic?
- To diagnose P1128, use an OBDII scanner to retrieve the code, then inspect the MAP sensor, vacuum lines, and intake system for any signs of damage or malfunction.
4. Can I drive my 1996 Honda Civic with OBDII code P1128?
- It is not recommended to drive your vehicle with code P1128 as it can lead to further engine damage and poor performance. It's best to address the issue promptly.
5. How can I repair OBDII code P1128 on my 1996 Honda Civic?
- Repairing P1128 typically involves replacing the faulty MAP sensor, fixing any vacuum leaks, or addressing issues with the intake system, depending on the underlying cause.
6. Are there any DIY tips for fixing OBDII code P1128 on a 1996 Honda Civic?
- DIY tips for addressing P1128 include checking and cleaning the MAP sensor, inspecting vacuum lines for leaks, and ensuring the intake system is properly sealed.
7. Will resetting the OBDII codes clear P1128 on my 1996 Honda Civic?
- Resetting the codes may temporarily clear P1128, but if the underlying issue is not addressed, the code is likely to reappear. It's crucial to diagnose and repair the root cause.
8. Can a dirty air filter trigger OBDII code P1128 in a 1996 Honda Civic?
- A dirty air filter can indirectly affect the MAP sensor readings, potentially leading to P1128. Regularly changing the air filter can help prevent such issues.
9. Is OBDII code P1128 a serious issue in a 1996 Honda Civic?
- While P1128 may not cause immediate breakdown, it can impact your vehicle's performance and fuel efficiency. Ignoring the code can lead to more significant problems over time.
10. How much does it typically cost to repair OBDII code P1128 on a 1996 Honda Civic?
- The cost to repair P1128 can vary depending on the exact cause and parts needed. On average, expect to spend anywhere from $100 to $300 for parts and labor.
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