P0432 means the main catalytic converter on Bank 2 has dropped below the efficiency threshold the ECU expects. Bank 2 is the cylinder bank that does not contain cylinder 1, so P0432 only applies to V6, V8, V10, V12, or certain flat engine layouts. It is the Bank 2 equivalent of P0422.
P0432 means the main catalytic converter on Bank 2 has dropped below the efficiency threshold the ECU expects. Bank 2 is the cylinder bank that does not contain cylinder 1, so P0432 only applies to V6, V8, V10, V12, or certain flat engine layouts. It is the Bank 2 equivalent of P0422.
P0432 è un codice diagnostico di guasto relativo a emissioni, classificato con gravità moderate. Quando la centralina (ECU) del tuo veicolo rileva questa condizione, memorizza P0432 e accende la spia motore.
Se il tuo veicolo ha attivato P0432, potresti notare uno o più di questi sintomi:
Ecco le cause più comuni di P0432, ordinate in base alla probabilità che siano la causa del problema:
In genere sì, per brevi tragitti. Safe for normal driving. The check engine light will prevent emissions or periodic technical inspection passage. If rattling appears from under the floor on the Bank 2 side, the converter substrate may be breaking apart and replacement should be prioritised.
Segui questi passaggi per individuare la causa principale di P0432:
I costi di riparazione di P0432 variano a seconda della causa principale e del tuo veicolo. Ecco le stime tipiche:
Prezzi stimati al March 2026. I costi variano in base alla regione, al veicolo e all'officina.
P0432 si comporta in modo diverso a seconda del tuo veicolo. Seleziona la tua auto qui sotto per cause specifiche del modello, problemi noti e stime dei costi adeguate:
2007-2013
P0432 on the 3 Series applies to V8 variants like the E90 and E92 M3 (S65 V8) and earlier V8 sport models. The Bank 2 main cat on the S65 sits in the underfloor section ahead of the secondary muffler and is more accessible than the manifold-integrated pre-cat. Always check Bank 2 fuel-trim history because S65 individual throttle body sync issues commonly cause Bank 2 to run slightly richer.
Costi stimati per i proprietari di BMW 3 Seriesadeguato al rialzo rispetto alla media a causa dei prezzi dei ricambi specifici BMW
Prezzi stimati al March 2026. I costi variano in base alla regione, al veicolo e all'officina.
2005-2024
The VW Touareg with 3.6 VR6 FSI, 3.0 TFSI V6, and 4.2 V8 FSI petrol engines sets P0432 around 180,000 to 220,000 km on the Bank 2 main cat. On the Touareg V8, the Bank 2 main cat is bolted directly to the front subframe area, making removal awkward and labour-intensive. Diesel V6 and V8 TDI Touaregs use a particulate filter system instead and rarely set P0432.
Costi stimati per i proprietari di Volkswagen Touaregadeguato al rialzo rispetto alla media a causa dei prezzi dei ricambi specifici Volkswagen
Prezzi stimati al March 2026. I costi variano in base alla regione, al veicolo e all'officina.
2005-2024
On the Audi A6 3.0 TFSI (EA837) and 3.0 TDI V6, P0432 typically appears at 180,000 km on the Bank 2 main cat. The Bank 2 main cat on the EA837 supercharged V6 is accessible from below without dropping the subframe, which keeps labour reasonable. On 3.0 TDI variants check for soot loading from a stuck EGR valve before condemning the cat itself.
Costi stimati per i proprietari di Audi A6adeguato al rialzo rispetto alla media a causa dei prezzi dei ricambi specifici Audi
Prezzi stimati al March 2026. I costi variano in base alla regione, al veicolo e all'officina.
2009-2024
On W212 and W213 E-Class with M276 V6 or M278 V8 engines, P0432 commonly appears at 180,000 km on the Bank 2 main cat. The M278 V8 (E550 and E63) has very tight underbody packaging on Bank 2, raising the labour estimate. Always check for M276 or M278 balance-shaft and chain wear, since both engine families have known rough-running issues that accelerate cat aging on either bank.
Costi stimati per i proprietari di Mercedes-Benz E-Classadeguato al rialzo rispetto alla media a causa dei prezzi dei ricambi specifici Mercedes-Benz
Prezzi stimati al March 2026. I costi variano in base alla regione, al veicolo e all'officina.
Questi codici compaiono spesso insieme a P0432 o indicano problemi correlati:
Both are Bank 2 catalyst efficiency codes. P0430 is the generic OBD-II code used by most manufacturers. P0432 is used by some manufacturers (commonly Chrysler-Jeep and some European brands) to specifically label the main catalyst when the exhaust has a separate warm-up pre-cat and main cat per bank. The diagnostic approach is essentially identical.
Yes, if Bank 1 shows no efficiency codes and the downstream O2 sensor traces look healthy. However, on engines past 180,000 km, the Bank 1 main cat is often within a year of triggering its own efficiency code, and many owners replace both at the same time to save on overlapping labour.
Asymmetric wear is common. Causes include intake manifold geometry that delivers a slightly different air-fuel ratio per bank, exhaust packaging that traps more heat on one side, or a single failing injector or coil that has been quietly causing partial misfires on Bank 2 for months.
Quality OEM-equivalent aftermarket cats from reputable European brands generally pass emissions and periodic technical inspection. Very cheap universal cats often do not meet the OEM oxygen storage spec and will trigger P0432 again within weeks. Always buy a cat with the correct certification (E-mark or equivalent for the EU market).
Collega un adattatore OBD2 Bluetooth standard, esegui la scansione dei codici e ottieni una diagnosi basata sull'IA con livelli di gravità e stime dei costi di riparazione.
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