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S4 / RS4 (B5 Platform) Discussion Discussion forum for the B5 Audi S4 & RS4 produced from 1998-2002

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Old 09-30-2006, 06:40 AM   #1
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Default Re: The Electronic Throttle Control, how do you know when it goes bad? What does the car do?

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Old 09-30-2006, 06:53 AM   #2
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Default EPC light on the cluster, a 'limp mode' of sorts....

if one of the potentiometers on the pedal assembly goes, throttle input should stay pretty normal as the other one will take over - if the actual throttle body goes the car will go into an emergency mode to allow you to get to a safe location to stop. its all in the 2.7T SSP.
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Old 09-30-2006, 06:57 AM   #3
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Default Does it give any symptoms of failing?

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Old 09-30-2006, 06:59 AM   #4
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Default Yes, flashing epc light and crappy throttle response like he said.

If you have VAG you can check the % of each pot in the gas pedal. They're inverted, as in one is 100% while the other is 0% and vice versa. Although you rarely see 100 and 0 for actual numbers. Check that first before you drop big bucks on a throttle body.
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Old 09-30-2006, 06:59 AM
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a3, a6, audi, bad, body, control, defective, electronic, failing, faulty, signs, symptoms, system, throttle, throttole


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