20 Most Recent 2009 Volkswagen Eos - Page 9 Questions & Answers

I believe it's a 10MM 12 point bit that fits.

The O2 sensor heater is an integral part of the sensor - so you must have had the complete O2 sensor replaced. I am wondering if this was the result of a code read or a code read and some further investigation? There is a variety of fault codes indicating a possible fault with the O2 heater circuit but such descriptions as heater circuit high, low, open or shorted can equally apply to the wiring, connections or even the computer. I wonder have you erased the fault code and road tested?

Wiring diagrams are arranged by system, not location within the vehicle. See this post on how to get the diagram you need. https://ricksfreeautorepairadvice.com/get-car-wiring-diagram/

Is the O2 sensor grting bad?

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I had a similar problem with a much older VW. I found that if I would loosen the fuel filler cap slightly, I would hear a hissing sound of air and power would return until I had driven some distance. This was caused by the fuel tank ventilation system not allowing air to enter the tank as fuel was consumed. This can cause enough of a vacuum in the tank to prevent fuel from reaching the engine. Stop the car (with the engine running) and slowly remove the fuel cap. If you hear an air rushing sound, that is the problem.

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A cam position sensor could also be bad

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Could be blown fuse, bad relay, bad horn or damaged/bad wiring.

Several locations, under the driver side dashboard or in the engine compartment.

Some of the relays are located under the driver seat which needs to be removed for access.

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check level- test oil sensor -pressure test --check for sludge

Brasso will fix the scratches and clean the lens