What does code P1129 mean on Honda vehicles?
The ECU detects that the manifold absolute pressure (MAP) signal is higher than expected.
OBD-II Code Honda
P1129 — Honda — MAP Higher Than Expected
The ECU detects that the manifold absolute pressure (MAP) signal is higher than expected.
Common symptoms
- Rich mixture
- hesitation
- poor drivability
Possible causes
- Short circuit
- faulty MAP sensor
Initial recommendation
Inspect MAP sensor wiring and replace sensor if necessary.
Safety notice
This information is for guidance only. Brand-specific codes may vary by model, year, engine, transmission and vehicle configuration. It does not replace a physical inspection or diagnosis by a qualified mechanic. If the vehicle is unsafe to operate, avoid driving it and seek professional inspection.
Analyze this code with MecaOBD
Use the app to combine Honda code P1129 with your vehicle's actual symptoms for more complete diagnostic guidance.
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