error code 17536 P1128
 

Hello,

I have an error code keep coming up of 17536 P1128 LONG TERM FULE TRIM - SYSTEM TOO LEAN BANK 1.

car is a 1,8T 2000MY avant with engine AWT.

I have replaced 3 of the vaccum hoses so far as they seemed very dry but engine light keeps coming on after about 50 miles of driving. Also sometimes when idling the revs with drop badly for a second then come back up ?

anybody got any ideas of what i need to look for ?

thanks
neil

Generally replace all the vacuum hoses....looks like a vacuum leak. Check the intake tract hoses, vacuum leaks will cause lean run.

A leak on the pressure side of the turbo will generally cause mass air flow sensor to think more air is delivered to engine than really is being delivered so the ecm will meter more fuel until the 02 sensor trims the fuel...unless the leak also leaks under closed throttle. So you generally have to check everything.

A smoke tester works as well but they're expensive. Dealers and indys often have them.

I had a problem with my 4.2A6 and a new intake manifold that still had a lean misfire condition...turns out a new OEM O-ring was leaking...the tech fitted a new slightly thicker O-ring that solved the problem. Only way to find the leaking O-ring was the smoke machine.

took my MAF out to clean it and there was no sensor wire to clean, is this correct ?

thanks
neil

Hello,

I did not know where to post it so I decided to write it here.

Friend of mine has Audi a4 1.8 t quattro 125 kw 170 km AWM

Error code: 17536 - BANK1 MULTIPLICATIVE MIXTURE ADAPTATION

I guess it refers to turbo or it is something going on with these vacuum hose ? I am not a machinist but he says that probably one of the "conductors" which goes to turbo is blowing the whole thing up.
But there so many of them that none of the machinists want to deal with that.
Sorry for my bad English, any ideas?

If it's a heated wire Mass Air Flow sensor and there is no wire, the sensor is toast. Look carefully; it's a fine wire.

So the best way is to buy a new one or it is somehow fixable?
Thanks for your reply.

broken Pt wire in MAF not fixable...about all you can do is get a rebuilt one, dunno if there's a core charge with your old one.

Try shokan.com and get a used one for your exact year and model.

'conductor' probably refers to one of the many vacuum hoses. Get busy and replace them all. Cheap initial fix/maintenance.

Will do. Thanks John for your replies. I appreciate that.

thanks for the replies,

ended up being the MAF sensor.

take that back !! still have problem

Hello,

Just had an audi mechanic around to have a look at the car. He put the car on VAG com and the lambda sensor was showing running too lean. when car held at 2k revs it was showing missfire on all cylinders.

new maf sensor fitted

all hoses checked and cleared of leaks.

not sure if this is relevent or not but i was parked with the car on a slope facing upwards and on idle car kept stalling i then managed to turn around and face down and car would idle without stalling.

could spark plugs cause this problem as dont know when they were last changed ? could it be fuel pump ? fuel filter ?

any suggestion much appreciated.

thanks
neil

Caskets replacement
 

The dealer advised to replace the casket as they claimed that air might be leaking from it. I did replaced them knowing that nothing is gonna change. After resting the errors the car went normal for less than one day and now I've lost the power again and still unable to hear the turbo whistling when I push on the Throttle. No one from the service centers I have visited advised me to check MAF sensor or Manifold sensor. I'm really desperate to solve this problem.

Caskets replacement
 

The dealer advised to replace the casket as they claimed that air might be leaking from it. I did replace them knowing that nothing is gonna change. After resting the errors the car went normal for less than one day and now I've lost the power again and still unable to hear the turbo whistling when I push on the Throttle. No one from the service centers I have visited advised me to check MAF sensor or Manifold sensor. I'm really desperate to solve this problem.

Possible fixes
 

Do you have oil on your plugs? If so you may need to change your valve cover gaskets, i just did those on mine. I'm also having some of the same issues, leaner fuel, my #4 intake coil is bad so I'm going to replace all of them.

Hello there,

Yes the mechanic told me that he found oil on the sparks, already replaced the valve casket, and yet the problem isn't solved, what happens with me is that the turbo air vacuuming sound get lower slightly until it dies completely.and by the way when I disconnect the Battery for a few minutes the car gets back to normal but it shakes for a around 20 seconds after starting the engine and after a few seconds the cat gets 100% normal, and after driving it for a few mile it dies again slightly.
I have also replaced two MAF sensors, Checked all vacuum hoses, and I don't know what else can I do.

What year and model is this Audi. This is the forum for C5 A6, built between 1997 and 2004.

Mine is 04' A4 1.8T and I posted here because I found someone who posted for the same car and on the other hand I have the same code 17536.

These are what i found for code P1128 for audi

Possible causes

• Faulty Mass Air Flow (MAF) sensor
• Low fuel pressure
• Vacuum leak on engine
• Faulty HO2S bank 1

it is probably your ignition coils and spark plugs. If you had oil on your plugs they need to be replaced.

I will do that thank you, Now everytime I remove the Battery the car shakes after starting the engine and it loses power for a few seconds, i mean no throttle at all and then gets back to normal. I'm trying to explain in details maybe we can exactly point the issue. as none of the specialists that I visited made any effort to get down to it and I'm trying to help myself. thank you again guys.

I thought that it might be the fuel pump, but if it is really the fuel pump, why does the car get back to normal temporarily when I disconnect the battery? I think this indicates to an electrical problem, right? I'm not a mechanist but it's my conclusion