Throttle/Pedal Position Sensor/Switch A Circuit Malfunction
Qu'est-ce que cela signifie ?
Code P0120 indicates a malfunction in the Throttle Position Sensor (TPS) 'A' circuit. The PCM monitors the TPS to determine throttle blade angle.
Avertissement : Ce code de diagnostic fait partie du système OBD2 standard et peut s'appliquer aux modèles Peugeot 3008 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 de position du papillon (TPS) défectueux
Faisceau de câblage endommagé ou cassé
Connecteur électrique corrodé ou desserré
Corps de papillon sale ou défectueux
Symptômes à surveiller
- Le voyant moteur est allumé
- Accélération faible ou réponse lente
- Régime moteur fluctuant
- Le moteur cale de façon inattendue
- Vitesse de ralenti erratique ou fluctuante
- Le véhicule passe en mode dégradé
Comment Diagnostiquer
Solutions Courantes
Replace the Throttle Position Sensor (TPS): This is the most common fix if the sensor itself is found to be faulty after voltage signal verification. Ensure the replacement part is of high quality, preferably OEM or a reputable aftermarket brand, as cheap sensors can quickly fail or provide inaccurate readings.
Repair or Replace Damaged Wiring/Connectors: If the diagnostic steps reveal damaged, corroded, or shorted wiring, or compromised connector terminals, these must be repaired or replaced. Use appropriate automotive-grade wiring and connectors, ensuring proper soldering and heat-shrink insulation for durable, long-lasting repairs.
Clean Throttle Body: If the throttle plate is sticking due to carbon buildup, it can put undue stress on the TPS or cause the PCM to interpret the sensor's output as erratic, especially if the sensor is integrated into the throttle body assembly. A thorough cleaning can restore smooth operation and prevent future issues.
PCM Software Update or Replacement: In rare cases, if all other components and wiring test perfectly, the issue might lie within the Powertrain Control Module itself. A PCM software update (reflash) might resolve a known calibration issue, or in extreme cases, the PCM may need to be replaced if its internal TPS driver circuit has failed. This should only be considered after exhausting all other diagnostic avenues.