Fix Audi A6 C7 (2012-2018) No AC Error Code 00256 (DIY AC Pressure Sensor Replacement)

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PART NUMBER for SENSOR: 4H0959126B

PART NUMBER for O-ring: 4E0260749A

Is your Audi A6 C7 (2012-2018) blowing warm air? Getting a frustrating error code 00256? This video will show you how to diagnose and fix the problem yourself by replacing the faulty AC pressure sensor. Save money on a trip to the mechanic and get your air conditioning back to ice cold!
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before you replaced the sensor, would your AC light turn on or shut off after you pressed it? When I press mine it shuts off right now

ryley
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Thanks for this video. Do I need the ODB Pro tool (which needs a subscription) or can I just use a basic ODB reader?

BarryfromEssex
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Just an FYI. This isn't the same location as the RS6. I think the RS6 needs the front bumper removing. But thanks for the vid.

BarryfromEssex
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I broke the new sensor inside. So upset right now. Any idea of how the whole housing is called so i can order a new one? Or do i need a whole new radiator 😂

armandasvaitekonis
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My ac light dont stay on, blowing hot air only. On a sg5

lounysq
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Sadly I over tightened it and snapped 😔

chamhadcoler