Fuel rail pressure too high cel

[vinnys3]

So i got a cel for "fuel rail pressure too high" p0088 and "cold start fuel pressure performance" p053F.

I changed the fuel pressure sensor on the rail and the regulator sensor and nothing still getting a code. I don't know where else to check from here. Anyone have prior experience with this?

[vacsimile]

What kind of car? I've seen this before on a chain-driven 2.0T and it was because the intake camshaft is out of time. You'll have to pull the front timing chain cover to check timing. If it's the belt-driven 2.0T I have no idea.

Also, charge the battery on your phone

[vinnys3]

2009 b8 a4 chain driven

[vinnys3]

And i just had my valve cover gasket changed so it makes sense because they need to release tension in the timing chain to do this job

[somedude]

why would a valve cover gasket have anything to do with your timing chain tension?

[vinnys3]

On the b8 the only way to safely raise the valve cover off u need to release pressure on the cams so u open the timing chain cover and release pressure on the tensioner and raise the valve cover so the car wont jump timing

[vacsimile]

Did you ever get this fixed?

[vinnys3]

No did all fuel sensors and hpfp and cam follower we r going to change the fuel injectors and see what happens we checked timing and it was fine

[vacsimile]

How did you check the timing?

[vinnys3]

My mechanic did he is an audi specialist and i also did logs and its correct

[vacsimile]

Ha well I guess your specialist can just keep throwing parts at it until it gets fixed then. After the injectors you'll be doing the low side fuel pump, then the fuel pump control module, then the ECM. I doubt any of these will fix your problem.

I'm telling you bro, it's timing. Put the crank in time and measure between the marks on the cams. It should be 125-127mm. If it's outside that range, timing is off. When the intake cam gets one tooth off it won't set a timing fault or run very bad.

I happen to be an Audi specialist, too.

[vinnys3]

Ok I'm going to have them check it again

[vinnys3]

Just to be sure this is a 2009 audi a4 b8 tfsi and also how can i check the timing do i just take the cover off and do it from there or ? Please explain if possible because i told my mechanic and he swears it isn't the timing so i wanna be there when we recheck it

[vacsimile]

Yeah, pull the upper timing chain cover and put the engine at TDC. There are two marks on the crank pulley and when the engine is at TDC one mark will point to 12 o'clock and the other will be at around 5 o'clock. The 5 o'clock mark needs to line up with a tiny triangle that's cast into the lower timing chain cover. That mark is super hard to find and you'll probably have to feel for it.

Once that is done look at the cam sprockets, they should have marks on them pointing upwards. The exhaust cam has a triangle cast into the sprocket and the intake cam had a line drawn on the cam adjuster sprocket. If these aren't pointing up you are on the wrong stroke so turn the engine over one more time and line up the crank pulley again.

Once the marks on the cams are pointing upwards take a tape measure and measure directly between the marks, the spec is 126mm +\- 1 mm.

There may be marks on the valve cover also but these aren't there from the factory and you can't go by these. They were made by a mechanic at some point to use as a guide.

[vinnys3]

Problem solved timing was a hair off

[Sharper_Image]

2009 A4 2.0 tfsi. Don't mean to bring this thread back from the dead but im also getting the P0088. Recently had the engine rebuilt after the timing chain tensioner failed. Sent the head out to get refurbished, pistons and rods was replaced. I assembled everything myself, i tripple checked everything. Car runs fine smooth idle no misfire no other codes and after reading this post i went ahead and check the timming again and everything was within spec. Fuel pressure sensor was also replaced on the fuel rail.

[Sharper_Image]

Bump anyone?

[Dirtyeuro87]

Now I was looking thru my obdeleven the other day and noticed I have a p0088 code but don’t have a cel car has 77k 2014 a4 2.0t tfsi I keep hearing it could be timing it could be the fuel pump and so on yet again I don’t have a cel so not really sure if it’s a problem or not dropping the car off after the holidays to see what’s wrong with it if anything

[JackDMan25]

Now I was looking thru my obdeleven the other day and noticed I have a p0088 code but don’t have a cel car has 77k 2014 a4 2.0t tfsi I keep hearing it could be timing it could be the fuel pump and so on yet again I don’t have a cel so not really sure if it’s a problem or not dropping the car off after the holidays to see what’s wrong with it if anything

Same issue here on my 2014, did you ever find out what was causing the p0088? Mine seems to pop on in cold weather here in Chicago


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[Nick4929]

I’m having the exact same issue. Rebuilt motor, timing, and all fuel and ignition addressed and still having this code, only thing I haven’t don’t is the fuel pressure regulator. I do have a stage one tune but have noticed the code is intermittent and only misfires under wide open throttle, maybe 2-3 misfires