P0173Fuel Trim Malfunction (Bank 2)
Ecco cosa significa il codice di errore P0173, perché si verifica e cosa fare.
Sistema: Fuel & air metering
Di solito è sicuro guidare per brevi tragitti, ma fallo controllare al più presto.
Cosa significa P0173
The engine computer adjusts how much fuel it adds based on readings from the oxygen sensors. This code means the correction needed on bank 2 (the engine side that does not contain cylinder #1) has gone too far in one direction. In practice the mixture is too rich or too lean and the computer can no longer compensate within its normal range.
Sintomi comuni
- Check engine light on
- Rough or unstable idle
- Reduced fuel economy
- Hesitation or stumble during acceleration
- Possible hard starting
Cause comuni
Elencate dalla più comune alla meno comune.
- 1Vacuum or intake air leak (unmetered air)
- 2Failing or dirty mass airflow (MAF) sensor
- 3Faulty oxygen sensor on bank 2
- 4Fuel delivery problem (weak fuel pump, low pressure, clogged or leaking injectors)
- 5Clogged or dirty fuel filter
- 6Exhaust leak near the oxygen sensor
- 7Vacuum leak from PCV system or hoses
Cosa fare
Have the live fuel-trim data read to see whether the system is running rich or lean, which narrows the cause quickly. Check for vacuum leaks and inspect the MAF sensor and fuel pressure before replacing parts. It is generally fine to keep driving short trips, but fix it soon to avoid wasted fuel and possible catalytic converter wear.
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Domande frequenti
Cosa significa il codice P0173?
The engine computer adjusts how much fuel it adds based on readings from the oxygen sensors. This code means the correction needed on bank 2 (the engine side that does not contain cylinder #1) has gone too far in one direction. In practice the mixture is too rich or too lean and the computer can no longer compensate within its normal range.
Quali sono le cause del codice P0173?
Le cause più comuni sono: Vacuum or intake air leak (unmetered air), Failing or dirty mass airflow (MAF) sensor, Faulty oxygen sensor on bank 2, Fuel delivery problem (weak fuel pump, low pressure, clogged or leaking injectors), Clogged or dirty fuel filter, Exhaust leak near the oxygen sensor, Vacuum leak from PCV system or hoses.
È sicuro guidare con P0173?
Di solito è sicuro guidare per brevi tragitti, ma fallo controllare al più presto.
Come si risolve il codice P0173?
Have the live fuel-trim data read to see whether the system is running rich or lean, which narrows the cause quickly. Check for vacuum leaks and inspect the MAF sensor and fuel pressure before replacing parts. It is generally fine to keep driving short trips, but fix it soon to avoid wasted fuel and possible catalytic converter wear.
Queste sono informazioni generali per aiutarti a capire il codice P0173, 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.