40d Intermittent pre cat fault code

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40d Intermittent pre cat fault code

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03-11-2024, 07:38 AM

e53uk

Member

Join Date: Sep 2023

Location: UK

Posts: 4

40d Intermittent pre cat fault code

Hi,

x5 40d (35d in the US I think!) with a fault code that comes back after clearing.

287500 Oxygen sensor before catalytic converter, signal: Too low the event of coasting overrun.

Car drives fine and no faults on dash. No other related faults stored. Shows up as intermittent fault so not permanent.

My initial thoughts are a sensor on the way out or dirty.

Any thoughts on this or recommendations to try?

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