P0175 : System Too Rich (Bank 2)

P0175 means the air-fuel mixture on Bank 2 is too rich and the ECU cannot remove enough fuel to bring it back to the 14.7:1 stoichiometric target. Because the code is bank-specific, the cause is usually something local to Bank 2 (a leaking injector on that side, a degraded sensor, or fuel pressure imbalances) rather than a whole-engine issue.

P0175 est un code defaut lie a systeme de carburant, classe en gravite moderate. Lorsque le calculateur de ton vehicule detecte cette condition, il enregistre P0175 et allume le voyant moteur.

Si ton vehicule a declenche P0175, tu peux remarquer un ou plusieurs de ces symptomes :

• Check engine light on
• Reduced fuel economy
• Strong fuel smell from the exhaust
• Black soot at the tailpipe outlets, sometimes only on one side
• Rough idle and possible cylinder-bank misfires

Voici les causes les plus courantes de P0175, classees selon la probabilite qu'elles soient en cause :

En general oui, pour des trajets courts. Short-term driving is safe, but a rich-running bank wastes fuel, fouls plugs on that side, and gradually damages the catalytic converter on Bank 2. Fix within a couple of weeks to avoid catalyst replacement costs.

Suis ces etapes pour identifier la cause profonde de P0175 :

1. Read live data: confirm Bank 2 long-term fuel trim is negative beyond -20% while Bank 1 stays within normal range
2. Pull Bank 2 spark plugs and inspect for black sooty deposits. Compare to Bank 1 plugs; a clear visual difference confirms the bank-specific richness
3. Swap the upstream lambda sensors between Bank 1 and Bank 2. If the rich condition follows the sensor, replace it
4. Measure fuel pressure with a gauge and compare to spec at idle and under load. High pressure can over-fuel both banks but sometimes shows up more on the bank with already weak injectors
5. Perform an injector balance test or have injectors flow-tested off the engine. A single leaking injector on Bank 2 explains the code on a V6 or V8

Les couts de reparation de P0175 varient selon la cause profonde et ton vehicule. Voici des estimations courantes :

P0175 se comporte differemment selon ton vehicule. Selectionne ta voiture ci-dessous pour des causes propres au modele, les problemes connus et des estimations de couts ajustees :

Ces codes apparaissent souvent avec P0175 ou indiquent des problemes connexes :