What does P0155 mean?

P0155 indicates o2 sensor heater circuit (bank 2 sensor 1). Heater circuit for bank 2 upstream O2 sensor. Common high-mileage failure on V-engines.

Can I diagnose P0155 with a basic code reader?

Yes — P0155 is typically accessible with a basic OBD2 code reader like the TOPDON ArtiDiag201 or TopScan Lite. Live data helps confirm the repair.

Which TOPDON scanner do I need for P0155?

Basic OBD2 code reader (engine codes, live data, smog readiness) See recommended tools on this page.

Is it safe to drive with P0155?

It depends on the code and symptoms. Flashing check engine lights and misfire codes should be addressed immediately. Consult a professional if unsure.

P0155

Sistema: Powertrain (Emissions)
Scanner richiesto: Basic OBD2 code reader (engine codes, live data, smog readiness)

O2 Sensor Heater Circuit (Bank 2 Sensor 1)

Understand P0155, common causes, and the right TOPDON scanner to diagnose it.

Heater circuit for bank 2 upstream O2 sensor. Common high-mileage failure on V-engines.

Sintomi comuni

Check engine light
I/M readiness monitor not ready

Cause tipiche

Failed O2 sensor
Heater fuse
Connector corrosion

Di quale scanner hai bisogno?

Basic OBD2 code reader (engine codes, live data, smog readiness)

Usa dati live e freeze frame prima di sostituire componenti. I codici ABS, SRS e U richiedono di solito uno scanner full-system.

Consigli diagnostici

Registra il freeze frame quando compare il codice
Cancella il codice solo dopo aver risolto la causa
Controlla codici pending correlati
Verifica che la batteria sia sopra 12,4 V prima di sospettare i sensori

Scanner TOPDON consigliati

TOPDON AL400 OBD2 Scanner

Collegalo a qualsiasi veicolo OBD2 dal 1996 in poi, estrai i codici in pochi secondi e utilizza la libreria DTC integrata per comprendere le definizioni dei guasti prima di visitare un negozio. Ideale come prima diagnosi.

4.5 (832 ratings)

27,89 €

Acquista su Amazon Vedi dettagli
-14%

TOPDON AD500 OBD2 Scanner Car Code Reader

Il ripristino del servizio dell'olio, la calibrazione SAS, il riapprendimento TPMS, la registrazione della batteria BMS e le routine EPB ti aiutano a completare i lavori di manutenzione per i quali le officine spesso addebitano la manodopera. Velocità AutoVIN.

142,27 € ~~165,54 €~~

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Domande frequenti

What does P0155 mean?: P0155 indicates o2 sensor heater circuit (bank 2 sensor 1). Heater circuit for bank 2 upstream O2 sensor. Common high-mileage failure on V-engines.
Can I diagnose P0155 with a basic code reader?: Yes — P0155 is typically accessible with a basic OBD2 code reader like the TOPDON ArtiDiag201 or TopScan Lite. Live data helps confirm the repair.
Which TOPDON scanner do I need for P0155?: Basic OBD2 code reader (engine codes, live data, smog readiness) See recommended tools on this page.
Is it safe to drive with P0155?: It depends on the code and symptoms. Flashing check engine lights and misfire codes should be addressed immediately. Consult a professional if unsure.