P2187 means the engine is running too lean specifically at idle speed on Bank 1. The fuel system is not delivering enough fuel relative to the amount of air entering the engine at low RPM. This is different from P0171, which indicates a lean condition across all operating ranges.
P2187 means the engine is running too lean specifically at idle speed on Bank 1. The fuel system is not delivering enough fuel relative to the amount of air entering the engine at low RPM. This is different from P0171, which indicates a lean condition across all operating ranges.
P2187 est un code defaut lie a systeme de carburant, classe en gravite moderate. Lorsque le calculateur de ton vehicule detecte cette condition, il enregistre P2187 et allume le voyant moteur.
Si ton vehicule a declenche P2187, tu peux remarquer un ou plusieurs de ces symptomes :
Voici les causes les plus courantes de P2187, classees selon la probabilite qu'elles soient en cause :
En general oui, pour des trajets courts. Short-term driving is acceptable but a lean condition can cause engine overheating and catalyst damage over time. Avoid heavy loads or sustained high-speed driving until diagnosed.
Suis ces etapes pour identifier la cause profonde de P2187 :
Les couts de reparation de P2187 varient selon la cause profonde et ton vehicule. Voici des estimations courantes :
Prix estimes au March 2026. Les couts varient selon la region, le vehicule et le garage.
P2187 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 :
2005-2024
The Golf with 1.4 TSI and 2.0 TFSI engines commonly triggers P2187 due to PCV system failures. The EA111 1.4 TSI has a diaphragm-type PCV valve integrated into the valve cover that tears over time, creating a large vacuum leak at idle. The EA888 2.0 TFSI has a similar issue with its PCV valve.
2005-2024
The E90/F30 with N52 and N55 engines is prone to P2187 due to the DISA valve (intake manifold flap) failing and causing an internal vacuum leak. The valve cover CCV (crankcase ventilation) system on the N52 is also a common failure point. BMW-specific vacuum leaks also occur at the oil filler cap gasket and dipstick tube.
Couts estimes pour les proprietaires de BMW 3 Seriesajuste a la hausse par rapport a la moyenne en raison du prix des pieces specifiques a BMW
Prix estimes au March 2026. Les couts varient selon la region, le vehicule et le garage.
2005-2024
The A3 with 1.4 TFSI and 2.0 TFSI engines shares the same PCV and vacuum leak issues as the VW Golf. On the A3 8P, check the brake servo vacuum hose, which runs under the intake manifold and is prone to cracking where it bends around the engine mount.
Couts estimes pour les proprietaires de Audi A3ajuste a la hausse par rapport a la moyenne en raison du prix des pieces specifiques a Audi
Prix estimes au March 2026. Les couts varient selon la region, le vehicule et le garage.
2004-2023
The Astra H and J with the Z16XER and A16XER engines trigger P2187 from intake manifold gasket failures. These engines use a plastic intake manifold with rubber gaskets that harden over time. A simple gasket replacement (under 80 EUR) usually resolves the issue.
Couts estimes pour les proprietaires de Opel Astraajuste a la baisse par rapport a la moyenne en raison du prix des pieces specifiques a Opel
Prix estimes au March 2026. Les couts varient selon la region, le vehicule et le garage.
Ces codes apparaissent souvent avec P2187 ou indiquent des problemes connexes :
P2187 means your engine is running too lean (too much air relative to fuel) specifically at idle speed on Bank 1. The ECU has detected that it needs to add more fuel than expected to maintain the correct air-fuel ratio at idle.
P0171 indicates a lean condition across all engine operating conditions, while P2187 is lean only at idle. P2187 strongly suggests a vacuum leak, since vacuum leaks have the most effect at idle when airflow is lowest and manifold vacuum is highest.
Yes, a vacuum leak is the most common cause of P2187. At idle, engine vacuum is at its highest, so even a small leak allows significant unmetered air into the intake. A smoke test is the best way to find vacuum leaks.
It can. A contaminated MAF sensor underreads airflow, causing the ECU to deliver insufficient fuel. Cleaning with dedicated MAF sensor cleaner spray is a simple first step that costs under 10 EUR and takes 10 minutes.
Short-term driving is safe, but a persistent lean condition at idle causes rough running and can lead to catalytic converter overheating over time. Diagnose and repair the cause within a few weeks.
Branche un adaptateur OBD2 Bluetooth standard, scanne les codes et obtiens un diagnostic par IA avec niveaux de gravite et estimations des couts de reparation.
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