Thread: need help with 02 sensor
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Old 08-26-2010, 01:56 PM
danielsatur danielsatur is offline
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Re: need help with 02 sensor
You still need an upstream oxygen sensor, it's the closest to the exhaust manifold.
This sensor gives feed back to the ECU on how well your car is performing.
It's used by the ECU for the air/fuel mix.
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