Phaeton :: ESP Light Resets Every Time When Car Turned Off And Comes On After Driving
Feb 26, 2012
Well this past week I have been getting the ESP light lit in my cluster during my weekly commutes. 1st: My car is a 2005 05 V8 model with 96K miles. The ESP light resets every time when the car is turned off and comes on after driving (varies), no hard CEL triggering with the condition. I notice yesterday that the ESP light comes on faster when I am coming up a hill. Yesterday when I started out on flat ground the light was off most of the trip (about 10 miles), it wasn't until I hit the hill on my way home that it illuminated (the final mile of my trip). One other major symptom, the Cruise Control does not "SET"; Cruise turns on and I see the indicator in the cluster, but when I hit the set function, it doesn't set the speed control. This happens both before and after the ESP light illuminates.
I have a VAD Pro and I ran a scan, both at the halt and on the move, the ESP light does NOT throw out a DTC in the ABS module or any others. However, their is one persistent fault that reoccurs (00526), faulty brake light switch; the Ross Tech site stated this is normal in some Automatic transmissions; if you do not push the brake pedal before the scan. My brake lights work fine & I understand their is two sets of contacts in the switch. Again, this DTC (00526) does not set the CEL. But, I am not ruling out a faulty brake light switch.
I performed a Goggle search and found an Audi A8 with an ESP issue, one of the members pointed to hydraulic unit under the hood , here is the link. [URL] ....
This A8 owner says a new brake light switch fixed his vehicle, and the cruise control was also not working as a symptom. [URL] ....
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Which fuse this may be and its location? Is there another possibility of failure?
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Car just hit 161,000km and all has been running well except for 1 nagging issue and 1 new one.First the nagging issue.
In January, I put on Continental DWS tires on the Phaeton and soon thereafter noticed a vibration in the car while driving. I could feel it in the steering wheel and could see the passenger headrest vibrating as well.
I saw some posts on these tires from other Phaeton owners saying that they also experienced some vibration, so that's what I thought it was.
At least that's what I thought until I went to the dealer for an oil change. I asked them to check wheel balancing and they told me at least 2 of the tires were way out of balance and they fixed it but there is still some vibration.
They did a test drive and said since the vibration is coming from the center of the car, it could be the driveshaft? They told me it's a problem with the Touregs but not with the Phaeton.
It's been killing an otherwise great ride for the last 6 months.
Also, I had my TPMS sensors replaced last year and it's been working great.
However last week, it went off, I clicked to reset and it reset with both rear tires and trunk showing OK. The front tires show a reading but instead of OK beside both, it's completely blank and the damn TPMS goes off every time I start the car.
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Mods that have affected electrical system:
Interior LEDs (front dome, rear dome, footwell lights, glove box and trunk)
1 JL 10 inch sub with JL 900/5 amp
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I refilled to my normal of 40/38 and reset the TPMS with the button below the steering wheel. The light stayed on for a minute or two of driving then turned off and stayed off for my commute to work.
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