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.

Check Engine Light is on Inspection $79.99 - $99.99 Get a Quote

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.

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


Experienced Mechanic?

Earn up to $70/hr

What others are asking

2007 Jeep Patriot

Key fob randomly flashing red while driving

What you are describing is a key FOB that becomes active (transmits) even when uncommanded. It might be defective, but before condemning it you can try the re-set procedure for the key FOB that is outlined in the Owner's Manual....

When i start my car toyota rav4 2011 it revs way high for about one second, then sounds normal and drives fine. Thoughts?

When the engine first starts it is normal for the computer to raise the idle up momentarily to keep the engine running. If you have not got the recall done for the smart stop for the vehicle then have the...

My clutch engages but my truck is still hard to get into gear 2003 Mazda B2300

Hi. It sounds like you are having a problem with the clutch hydraulic system. If the clutch appears to be engaging and not slipping then the hydraulic system is not fully disengaging the clutch which makes it hard to change...

Why did my car stop while driving?

Hi There, This is likely related to your EVAP emissions system and something called a purge solenoid. The EVAP system prevents fuel vapors from the fuel tank from escaping into the atmosphere. The EVAP system collects and temporarily stores the...

I hear a clicking noise when engine starts

From the information provided on your Nissan Frontier, has lead me to believe that it may be experiencing an undercharged battery or even possibly a bad starter. To be 100% certain however, it may be time to enlist the assistance...

Related articles

Top 10 Factors to Consider When Buying a Luxury Car
The The idea of owning a luxury car is appealing. The glossy paint, swoopy lines, and prestigious badges speak of the owner’s success in life, while the interior opulence offers scented leather surfaces, high-tech telematic devices, and all the creature-comfort...
The Best Used Cars to Buy If You Live in a Windy Area
If If you live in a windy area, one of the most important things you’re going to be looking for in a used vehicle is the ability to remain stable on the road on even the most blustery days. That...
A Buyer’s Guide to the 2012 Audi Q7
When When only the most exacting performance will do, but you want an SUV that delivers third row seating and is comfortable enough for family trips, the 2012 Audi Q7 should be on your list. Key Features While it is...