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Old 11-29-2023, 07:52 AM   #1
markowen
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Drives: Toyota Yaris, 2000, 1.0 petrol
Join Date: Nov 2023
Location: Belfast
Posts: 1
Wrong ODB code returned?

I have a Yaris Mk1 (2000) which is displaying the engine light. When I run the ODB reader it comes back with cam shaft sensor. I replaced the sensor and the light comes back after being reset.

The car is really sluggish on a cold engine but runs great and nippy enough when warm. Plugs look good - nice medium tan colour.

If the ignition timing was wrong I would expect some 'symptoms' when the engine is warm as well.

I don't think it's a choke issue because there is no indication it will stall after being started - just very sluggish - which makes me wonder if there is another sensor, perhaps O2, that is badly managing fuel when cold.

So I also wonder if the ODB code is wrong and it should say O2 sensor?

Also, if I reset the ODB code (cam shaft sensor) when the engine is warm it stays off. But then returns once the engine has been left to cool.

Any thoughts?
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cold engine, odbii, sluggish

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