Audi Repair Questions? Ask a Mechanic for Answers ASAP
Hi im kevin whats the actual fault code you have ?
Brake boost is run off vac system so this could confuse the system into not resetting evap system
Brake booster is a large diapram run from intake vacumme.that uses the vacumme from intake to multiply the braking force.this fault code will need to be sorted
Its more likely the pressure sensor .the actual code will be needed to confirm this
This would point toward a booster vac pump failure .this will need to be tested with vac gauge
Thats the one
This is highly possible this needs to be fixed to get car through test anyway
The later the leter the newer the nart for instance is it ended with an a originally .everytime the part is improved the letter gets higher
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Hello, my name is ***** ***** thank you for using just answer. It appears your main goal here is to pass emissions testing, so I am going to focus on that. I also happen to be a licensed smog technician. Is the check engine lamp currently illuminated? thanks.
Kyle S.A.S.E. certified master auto technicianlicensed smog technician, test and repair, L-1 advanced engine performance certifiedCertified Volkswagen technician, 2003,2004,2013,2014,2015Volkswagen and Audi independent 12 years
What would really help you out here is the ross-tech scanner. It has the abilty to " force" thru the emissions moniters thru "basic settings". Since your vehicle will still pass the test with the evap moniter not run, I would run the secondary air system with the scan tool. It will either "pass", or if there is an issue with the system it will immediately throw a code if it fails the test. This is much easier than a standard "drive cycle" for setting the emissions moniters.
Right. Its ok to have codes, you will still pass the emissions test, as long as the check engine lamp is off. You just need all the moniters ran except evap, its ok for it to not have ran yet.
Typically, you would have to have a returning issue bad enough to turn the check engine lamp on to prevent moniters from running. Secondary air is a real finicky one to set. I would ensure your thermostat is working properly, that will definitely prevent moniters from running. Also, where are you located? If it isn't real cold air injection will run less frequently.
Only if the leak is also going into the coolant temp sensor and causing a faulty reading. I highly reccomend you have them change the thermostat while servicing your cooling system. It may be part of your issue, and it is good maintenance.