MasterTuning Fault code dictionary (DTC)

P20B3 — component G3/7 (left O2 sensor,before CAT,cylinder 7-9) heating (P0155)

Severity: Warning Can you drive? With caution: limp mode possible, have it checked soon Make: All makes (OBD-II standard)
Meaningcomponent G3/7 (left O2 sensor,before CAT,cylinder 7-9) heating (P0155).
FamilyPowertrain (P)

Frequently asked questions

What does code P20B3 mean?

component G3/7 (left O2 sensor,before CAT,cylinder 7-9) heating (P0155). component G3/7 (left O2 sensor,before CAT,cylinder 7-9) heating (P0155).

Can I keep driving with code P20B3 active?

With caution: limp mode possible, have it checked soon

How do you fix code P20B3?

Diagnosis starts from reading the live ECU parameters: the code points to the fault area, not to the part to replace. A vehicle-electronics specialist can test the component and clear the code after the repair.

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Where to get it fixed

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