Q: Codes p0441 and p0089

asked by on May 16, 2016

When im accelerating fast it kicks and doesnt want to go. And sometimes whenever i try to start the car it takes a while to go on. I just paid my mechaic 800 to fix it and its still messing up. I dont want to blow more money then i have to. What are some solutions i can do. Im a little mechanic savy

My car has 82200 miles.
My car has an automatic transmission.

Those faults are two totally separate issues. The P0441 is an evaporative emissions system fault, and the P0089 is a fuel pressure regulation fault. This generation of Audi A4 was notorious for high pressure fuel pump problems. There were multiple updates to the fuel pressure sensors for the low and high pressure systems, as well as problems with the camshaft follower that drives the high pressure fuel pump. They also had frequent problems with the in tank fuel pump, which delivers fuel to the high pressure pump. The evaporative emissions code could be as simple as a failed purge valve, which was also extremely common for these vehicles. The carbon canister starts to degrade and contaminates the purge valve, so the fix is to replace the canister and the purge valve together.

The fuel pressure faults are the most likely cause of the rough acceleration and hard starting, though both issues should be addressed to achieve proper performance. The purge valve is easy to replace, the canister is more difficult. Checking the fuel pressure system will require a capable scan tool, as well as a mechanical fuel pressure gauge and a knowledge of how the high pressure fuel system works. Working on these high pressure fuel systems is not advised unless you completely understand the operation and are very comfortable with them. I strongly suggest having a qualified professional, such as one from YourMechanic, diagnose the check engine light for you.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Large EVAC leak.

Hello. If the gas cap is verified to be good, the most common culprits are the purge valve and charcoal canister. If you would need help having this checked, a certified technician from YourMechanic can come to your car's location...

Audi A4 B8 chasis 2.0 tfsi Running rich

There are just a few things that will make your car run rich, you have already replaced the MAF, so that leaves the Coolant temp sensor,(CTS) the Throttle position sensor(TPS) and the fuel pressure. The temp sensor and the throttle...

I’m seeing and smelling smoke and my traction control light is on.. is this a common problem? Also my ABS light blinks on occasion

Smoke from under the hood will be oil or coolant leaks. If I had to guess, I'd say you probably have some oil leaks that are getting oil on the exhaust manifold which burns when it hits the hot surface....

Related articles

The Best Used Cars to Buy If You Live in a Cold Climate
If If you live in a cold climate, likely one of your biggest concerns when you are considering which used vehicle you should buy is how well it will perform in snowy, icy conditions. We have evaluated a number...
A Buyer’s Guide to the 2012 Audi TT
Audi Audi can be depended upon to bring the ultimate in refinement to the table, along with quality, style, and performance. The TT is no exception to this rule – with its aerodynamic almost Porsche-like look and 360 turbocharged horses...
The Best Used Cars to Buy If You're a Pizza Delivery Guy or Gal
If If you deliver pizzas, you want to be sure that your car is reliable and won’t break down. After all, you have hungry customers waiting, and you don’t want the pizza to get cold. You want low gas mileage,...