Possible false error codes

Asked by KSquish89 Nov 07, 2018 at 05:27 PM about the 2002 Toyota RAV4 FWD

Question type: Maintenance & Repair

Two months ago, I got a code for a bad O2 sensor (Bank 1 Sensor 1). Last
week I did another reading and it showed B1S1 and B2S2 were bad. Today, I
took my car to the shop and they said THREE sensors were now triggering
error codes (B1S1, B2S2 and B1S1). They suggested I take it to an electrician
before spending money to replace any sensors since it is rare that 3/4 of the
sensors will go out at once. Can you advise?

1 Answer
157,475

Bob answered 5 years ago

O2 sensors usually get slow or go bad after 100,000 miles. If you are past 100,000 then change all of them, but have the wiring checked over.

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