P0121Throttle/Pedal Position Sensor/Switch "A" Circuit Range/Performance
Voici ce que signifie le code défaut P0121, pourquoi il apparaît et que faire à son sujet.
Système: Fuel & air metering
Généralement sans danger sur de courtes distances, mais faites-le contrôler rapidement.
Ce que signifie P0121
The throttle or pedal position 'A' signal is present but its value does not match what the computer expects, for example it does not agree with airflow, a second sensor, or known idle/wide-open positions. The signal is out of range or tracks poorly. The computer cannot fully trust the throttle reading.
Symptômes courants
- Check engine light on
- Hesitation or surging
- Erratic idle
- Reduced power / limp mode
- Poor throttle response
Causes courantes
Classées de la plus courante à la moins courante.
- 1Faulty or worn throttle position sensor (TPS)
- 2Dirty or carboned throttle body affecting throttle plate position
- 3Wiring or connector resistance/intermittent contact
- 4Mechanical throttle linkage or throttle body wear
- 5Sensor not correctly calibrated/relearned after service
Que faire
Generally drivable for short trips but it may go into limp mode, so have it checked soon. A technician should compare the sensor signal to expected values and inspect wiring and the throttle body. Cleaning or replacing the throttle body/sensor and performing any required relearn often resolves it.
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Questions fréquentes
Que signifie le code P0121 ?
The throttle or pedal position 'A' signal is present but its value does not match what the computer expects, for example it does not agree with airflow, a second sensor, or known idle/wide-open positions. The signal is out of range or tracks poorly. The computer cannot fully trust the throttle reading.
Quelles sont les causes du code P0121 ?
Les causes les plus courantes sont : Faulty or worn throttle position sensor (TPS), Dirty or carboned throttle body affecting throttle plate position, Wiring or connector resistance/intermittent contact, Mechanical throttle linkage or throttle body wear, Sensor not correctly calibrated/relearned after service.
Peut-on rouler sans danger avec le code P0121 ?
Généralement sans danger sur de courtes distances, mais faites-le contrôler rapidement.
Comment corriger le code P0121 ?
Generally drivable for short trips but it may go into limp mode, so have it checked soon. A technician should compare the sensor signal to expected values and inspect wiring and the throttle body. Cleaning or replacing the throttle body/sensor and performing any required relearn often resolves it.
Ce sont des informations générales pour vous aider à comprendre le code P0121, et non un substitut au diagnostic d’un mécanicien qualifié. Confirmez toujours la cause avant de remplacer des pièces.
Les définitions des codes suivent la liste OBD-II normalisée (SAE J2012). CarVinVin est indépendant et n’est affilié à aucun constructeur.