Question about 1996 Audi A4

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State Emissions Test

My 1996 Audi A4 recently failed the MD Emissions test because
Engine coolant Temp Circuit Range/Performance Problem
Sensor Circuit Malfunction
Manufacture's Code

Can you offer any fixes in order for me to avoid going to the dealer?

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  • choo3474 Sep 14, 2008

    Thanks. I'm researching the sites you listed.

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Sounds like a failure of the engine coolant temperature sensor, which is a known weakness on the B5 chassis Audi A4 (model years 96-01). The sensor is relatively inexpensive ($20-30) and if you call up ECS Tuning (www.ecstuning.com) or Pure Motorsports (www.purems.com) with your VIN number, they can send you the correct sensor (there are three types, identified by color of the connector - black, blue, or green). Changing it is somewhat of a pain due to its location, but it can be done in 30-40 minutes. You have the 12 valve 2.8 V6 - take a look at www.audidiy.com and www.12v.org (two dedicated Audi sites) - there are a ton of tech procedures on those sites, and you'll likely find what you need there - a detailed, step by step, photo-referenced procedure on how to change the sensor.

Posted on Sep 11, 2008

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