P1128 2009 HONDA ACCORD - Manifold Absolute Pressure Sensor Signal Lower Than Expected
P1128 2009 HONDA ACCORD Possible Causes
- 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 do I fix code P1128 2009 HONDA ACCORD
Check the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.
Cost of diagnosing the P1128 2009 HONDA ACCORD code
Labor: 1.0The cost of diagnosing the P1128 2009 HONDA ACCORD code is 1.0 hour of labor. The auto repair labor rates vary widely across the country, and even within the same city. Most auto repairs shops charge between $75 and $150 per hour.
P1128 2009 HONDA ACCORD Possible Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
P1128 2009 HONDA ACCORD MeaningThe Manifold Absolute Pressure (MAP) sensor senses manifold absolute pressure (vacuum) and converts it into electrical signals. The MAP sensor outputs low signal voltage at high-vacuum (idling) and high signal voltage at low-vacuum (throttle valve wide open).
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.
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