Acura DTC P1128 – MAP Lower Than Expected
DTC P1128 meaning on Acura
DTC P1128 on an Acura indicates that the Manifold Absolute Pressure (MAP) sensor is reporting a lower than expected reading to the Engine Control Module (ECM). The ECM uses the MAP sensor to monitor the intake manifold pressure, which is crucial for determining the engine’s fuel delivery and ignition timing.
Acura DTC P1128 symptoms
Symptoms of DTC P1128 on an Acura may include:
- Check Engine Light (CEL) illuminated
- Decreased engine performance
- Poor fuel economy
- Rough idling or stalling
Acura DTC P1128 causes
Common causes of DTC P1128 on an Acura include:
- Defective MAP sensor
- Vacuum leaks in the intake system
- Incorrect fuel pressure
- Wiring or connector issues in the MAP sensor circuit
Acura DTC P1128 seriousness
While DTC P1128 may not cause immediate engine failure, it can lead to poor engine performance and decreased fuel efficiency. Ignoring this code may result in further damage to engine components over time.
How to diagnose DTC P1128 on Acura
To diagnose DTC P1128 on an Acura, you can:
- Use a scan tool to retrieve the trouble code and freeze frame data
- Inspect the MAP sensor and its wiring for any visible damage
- Check for vacuum leaks in the intake system
- Test the MAP sensor’s output voltage with a multimeter
How to fix DTC P1128 on Acura
To fix DTC P1128 on an Acura, you may need to:
- Replace the faulty MAP sensor
- Repair any vacuum leaks in the intake system
- Ensure the fuel pressure is within specifications
- Inspect and repair any damaged wiring or connectors in the MAP sensor circuit
How to erase DTC P1128 on Acura
After fixing the underlying issue causing DTC P1128 on an Acura, you can erase the trouble code by:
- Using a scan tool to clear the code and reset the ECM
- Driving the vehicle through a complete drive cycle to ensure the code does not return
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