All codes › P0141

P0141 — Post-Cat O2 Heater Circuit (Bank 1 Downstream)

P0141 is set when the heater element built into the Bank 1 downstream (post-catalyst) oxygen sensor does not draw the expected current when commanded on. The downstream sensor's job is to monitor catalyst efficiency, and it needs its heater to reach operating temperature before it can produce a useful signal. P0141 is the downstream counterpart of P0135.

Pick your vehicle for a P0141 diagnosis

Select your exact year, make, and model below to get a diagnostic guide tuned to your vehicle's known failure patterns and TSBs.