17545 - Fuel Trim: Bank 1: System too Rich

[Westy]

The following error has come up on my mates car which is an A3 1.8T Sport (AUM). Audi have told him that the car needs a new cat but I have been doing some tests on it and I believe the fault is with something else.

1 Fault Found:
17545 - Fuel Trim: Bank 1 (Add): System too Rich
P1137 - 35-00 - -

Firstly can anyone confirm what the power output of the AUM K03s should be as the MAF is calculating around 150bhp

Secondly has anyone had this error before, and can you shed any light on the problem?

I've tested the lambda sensors and the fuel EVAP system and everything comes back fine. I cleared the MIL and the car seems to drive fine, very smooth and no hesitation to suggest the Cat is shagged! My mate says that the car just seems to cut its power which I think is due to the MIL putting the car into limp mode.

Anyway this is what Ross-Tech suggest may be the problem so I will check:

17545/P1137/004407 - Fuel Trim: Bank 1 (Add): System too Rich

Possible Symptoms

• Malfunction Indicator Light (MIL) active

Possible Causes

• Mass Air Flow (MAF) Sensor faulty
• Fuel Pressure Regulator faulty
• Fuel Injector(s) faulty
• Oxygen Sensor Control faulty
  • Oxygen Sensor(s) faulty
• Evaporative Emission (EVAP) System faulty

Possible Solutions

• Check Mass Air Flow (MAF) Sensor
• Check Fuel Pressure Regulator
• Check Fuel Injector(s)
• Check Oxygen Sensor Control
  • Check Oxygen Sensor(s)
• Check Evaporative Emission (EVAP) System

Thanks for any help.

Westy

 

[[Dave B]]

I had a very similar fault as detailed in this thread: http://www.audi-sport.net/vb/a3-s3-forum-8l-chassis/109628-mafs-boost-leaks-info-please.html

This was eventually discovered to be a clogged FPR due to vPower dissolving the insides of the rubber fuel pipes leading to the fuel rail, as pictured in my thread about Badger5 TIP and JC Filter.

Your code is slightly different though as it states (Add) rather than (Multi). There's a good explanation about the differences somewhere.....

 

[badger5]

this

 

[[Dave B]]

That's the bad boy..

 

[[Dave B]]

This info might help: Ross-Tech: VAG-COM: Fuel Trim Info

 

[Westy]

This info might help: Ross-Tech: VAG-COM: Fuel Trim Info

Cheers mate, already been reading that

 

[Westy]

Right, it's definitely not the FPR as I just checked it in the work carpark. It's clean as a whistle.

Word of warning, dont do mechanical work in a suit! The FPR still had pressure in it and I got sprayed with fuel as I popped the top off. My colleagues in the office aren't best pleased with the smell!

 

[Carl.S]

boost leak is also a possibility

 

[DenCar]

I had that code along with the code for a problem with the pre-cat lambada sensor, i had a new lambada fitted and and the code has not returned. Fuel economy improved from around 26mpg to 35 mpg now. This was on my wifes car.

DC

 

[westcoast a3]

@Westy did you get to the bottom of this code ?? having same issue both lambdas new, fpr new going to check out a possible boost leak tomorrow and change a possible leaking injector. cheers

 

[superkarl]

Don't rule out the most temperamental sensor of them all, MAF

 

[Westy]

@Westy did you get to the bottom of this code ?? having same issue both lambdas new, fpr new going to check out a possible boost leak tomorrow and change a possible leaking injector. cheers

No, never got to the bottom of this but to be honest I never had a good look at it as it was for a guy at my old work place. He ended up selling it as it was at the time.

 

[badger5]

@Westy did you get to the bottom of this code ?? having same issue both lambdas new, fpr new going to check out a possible boost leak tomorrow and change a possible leaking injector. cheers

logs?
block 001,002,031, and report what block 032 says
What car? engine code?

 

[westcoast a3]

@badger5 it's an a3 1.8tqs with apy s3 engine, in it though.

You haven't as yet done any logs as my mate has now borrowed my cable, though today I took the injectors out and all the rings in the rail had swollen, I have changed them for now car feels better but won't get a chance to log till Saturday,.

@superkarl

The maf is also new genuine Bosch.

Thanks guys


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[badger5]

narrow band ecu then yes or wideband?

 

[westcoast a3]

It is wide band, with vvt tensioner, swapped out my ary for apy as was rodded, car is 2001


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[badger5]

vcds to check fuel trims on 032 and maf reading on 002, and lambda adjustment on 001

 

[badger5]

we have seen this once where customer had fitted their in tank pump and kinked the return fuel line... Too much fuel pressure consequently

 

[westcoast a3]

@badger5 I will go and get these done asap, and report back, also a noob question do you do these logs with car running ? Thanks


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[badger5]

block 032 just read the number. Dont reset faultcodes as this will zero the adaptions.
the other blocks need to be live data yes

 

[westcoast a3]

Thanks


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[westcoast a3]

@badger5 I have finally done some logs

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[westcoast a3]

Unsure how to post, the file is in excel, only lets me pick certain file types and that isn't one lol


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[westcoast a3]

Sorry the best I can do till I work out how to post the full file lol thanks again


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[badger5]

you stuck a 4bar fpr on there?

 

[westcoast a3]

I bought a new fpr topran thought was a 3bar as phoned company selling, told me it was. I have since changed it to a genuine 3bar when this log was taken, also changed the injectors, and checked for boost leaks


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[westcoast a3]

Although since doing the fpr and injectors the 17545 code hasn't come back :/


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