MasterTuning Fault code dictionary (DTC)

P0135 — O2 sensor heater circuit (bank 1 sensor 1)

Severity: Attenzione Can you drive? Sì, no known limitation Produttore: Tutti makes (OBD-II standard)
MeaningA lambda sensor must reach Chi Siamo 300°C a measure, and gets there with an internal heater. When that heater fails the sensor stays blind until the exhaust warms it up.
FamilyPowertrain (P)

Typical symptoms

Motore Attenzione light on, often right after starting
Higher consumption in the Prima minutes
Rough cold idle
No symptoms once warm

Common causes

aperti circuit in the sensor's internal heater: a wear Voce
Blown heater circuit fuse
Broken relay oppure wiring
Connector melted by exhaust heat

What a do

Measure the heater resistance across its two dedicated pins: an aperti circuit means the sensor is finished. Check the fuse Prima though, because when it blows the heater codes di every sensor appear together — and then the sensors are not alle fault.

Domande Frequenti

What does code P0135 mean?

O2 sensor heater circuit (bank 1 sensor 1). A lambda sensor must reach Chi Siamo 300°C a measure, and gets there with an internal heater. When that heater fails the sensor stays blind until the exhaust warms it up.

Can I keep driving with code P0135 Attivo?

Sì, no known limitation

Common causes — P0135

aperti circuit in the sensor's internal heater: a wear Voce Blown heater circuit fuse Broken relay or wiring Connector melted by exhaust heat

How do you fix code P0135?

Measure the heater resistance across its two dedicated pins: an aperti circuit means the sensor is finished. Check the fuse Prima though, because when it blows the heater codes di every sensor appear together — and then the sensors are not alle fault.

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