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P1129 Honda

P1129 Honda - Manifold Absolute Pressure Sensor Circuit Higher Than Expected

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P1129 Honda Comments |  Add Comment
Possible causes
- Faulty Manifold Absolute Pressure Sensor
- Manifold Absolute Pressure Sensor harness is open or shorted
- Manifold Absolute Pressure Sensor circuit poor electrical connection
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Tech notes
There is a factory service bulletin for the following Honda models:

2001 Honda Odyssey
2003 Honda Odyssey
2003 Honda Pilot
Honda Factory Service Bulletin OBDII Code P1129
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Possible symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
- Engine hard to start
- Rough or erratic idle speed
P1129 Honda Description

The Manifold Αbsolute Pressure (MΑP) sensor generates a signal that is proportional to the amount of vacuum in the intake manifold. The signal is sent to the Engine Control Mudule (ECM) and the information is used to control the air/fuel mixture ratio. Faulty MΑP sensor can cuase the engine to stall, surge or a rough idle.

P1129 Honda Information for specific Honda models
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HONDA Technical Service Bulletins for P1129 code
2001 HONDA ODYSSEY Engine And Engine Cooling:engine Details
2002 HONDA ODYSSEY Engine And Engine Cooling:engine Details
2003 HONDA ODYSSEY Engine And Engine Cooling:engine Details
2003 HONDA PILOT Engine And Engine Cooling:engine Details
2001 HONDA ODYSSEY 061000 Engine And Engine Cooling:engine Details
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