MAP/Barometric Pressure Circuit Intermittent
Qu'est-ce que cela signifie ?
Code P0109 indicates an intermittent signal from the MAP/Barometric pressure sensor, where the voltage fluctuates erratically.
Avertissement : Ce code de diagnostic fait partie du système OBD2 standard et peut s'appliquer aux modèles Honda Hr-v fabriqués de 1996 à 2026. Cependant, veuillez noter que la présence de ce code dépend de la configuration exacte du moteur, des options et de l'année de production.
Causes courantes
Capteur MAP (pression absolue du collecteur) défectueux
Faisceau de câblage endommagé ou cassé
Connecteur électrique corrodé ou desserré
Symptômes à surveiller
- Le voyant moteur est allumé
- Ralenti irrégulier ou instable
- Régime moteur fluctuant
- Hésitation ou trébuchement à l'accélération
Comment Diagnostiquer
Solutions Courantes
**Repair or Replace Damaged Wiring/Connector:** The most common fix for an intermittent circuit code is addressing compromised electrical connections. This involves repairing frayed or broken wires, replacing corroded or spread terminals within the connector, or replacing the entire MAP sensor pigtail connector if the damage is extensive and irreparable.
**Replace the Manifold Absolute Pressure (MAP) Sensor:** If the sensor fails the vacuum pump test, exhibits erratic behavior in live data despite verified good wiring, or if the internal components are failing intermittently, replacing the MAP sensor is the direct solution. This is a frequent failure point for intermittent codes.
**Locate and Repair Vacuum Leaks:** An intermittent vacuum leak (e.g., a cracked hose that flexes under engine movement, a loose fitting, or a failing intake manifold gasket that seals intermittently) can cause the MAP sensor to report erratic pressure readings, triggering this code. A smoke machine is highly effective for pinpointing these elusive leaks.
**Clean Throttle Body and Intake Manifold Passages:** Excessive carbon buildup in the throttle body or intake manifold can sometimes cause erratic airflow and vacuum fluctuations, particularly at idle or during transitions. This can lead the MAP sensor to interpret these fluctuations as an intermittent signal, even if the sensor itself is functioning correctly.