P0151O2 Sensor Circuit Low Voltage (Bank 2 Sensor 1)
Ecco cosa significa il codice di errore P0151, perché si verifica e cosa fare.
Sistema: Fuel & air metering (O2 sensor)
Di solito è sicuro guidare per brevi tragitti, ma fallo controllare al più presto.
Cosa significa P0151
The engine computer saw the voltage from the upstream oxygen sensor on bank 2 (the cylinder bank that does NOT contain cylinder #1) stay too low. This sensor measures oxygen in the exhaust so the computer can balance the fuel mixture. A low reading usually means the sensor reports a constantly lean (too much air) condition or has lost its signal.
Sintomi comuni
- Check engine light on
- Reduced fuel economy
- Rough or uneven running in some cases
- Possible hesitation or slight loss of power
Cause comuni
Elencate dalla più comune alla meno comune.
- 1Failed or aged upstream O2 sensor on bank 2
- 2Wiring or connector fault (open/short to ground) in the sensor circuit
- 3Exhaust leak near the sensor letting in outside air
- 4Actual lean running condition (vacuum leak, low fuel pressure)
- 5Corroded or loose sensor connector
- 6ECM/PCM fault (rare)
Cosa fare
It is usually fine to drive short distances, but get it diagnosed soon because a long-running wrong fuel mixture can foul the catalytic converter and waste fuel. A technician will check the sensor wiring and signal before replacing the sensor, since a wiring fault or vacuum leak can mimic a bad sensor.
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Domande frequenti
Cosa significa il codice P0151?
The engine computer saw the voltage from the upstream oxygen sensor on bank 2 (the cylinder bank that does NOT contain cylinder #1) stay too low. This sensor measures oxygen in the exhaust so the computer can balance the fuel mixture. A low reading usually means the sensor reports a constantly lean (too much air) condition or has lost its signal.
Quali sono le cause del codice P0151?
Le cause più comuni sono: Failed or aged upstream O2 sensor on bank 2, Wiring or connector fault (open/short to ground) in the sensor circuit, Exhaust leak near the sensor letting in outside air, Actual lean running condition (vacuum leak, low fuel pressure), Corroded or loose sensor connector, ECM/PCM fault (rare).
È sicuro guidare con P0151?
Di solito è sicuro guidare per brevi tragitti, ma fallo controllare al più presto.
Come si risolve il codice P0151?
It is usually fine to drive short distances, but get it diagnosed soon because a long-running wrong fuel mixture can foul the catalytic converter and waste fuel. A technician will check the sensor wiring and signal before replacing the sensor, since a wiring fault or vacuum leak can mimic a bad sensor.
Queste sono informazioni generali per aiutarti a capire il codice P0151, non un sostituto della diagnosi di un meccanico qualificato. Conferma sempre la causa prima di sostituire i componenti.
Le definizioni dei codici seguono l’elenco standardizzato OBD-II (SAE J2012). CarVinVin è indipendente e non è affiliata ad alcun produttore.