a6blacked007 Posted June 3 Posted June 3 (edited) Hi guys looking for some help with my 2010 3.0 tdi getting code p0104 replaced maf with my friends a7 3.0 tdi but fault still won't clear there's also a fault for oxygen sensor which has been there since I bought car eml is on immediately starting car it will go once reset but returns next start fault on carista won't reset though...fault started abput a month ago Not sure we're to look next .... Edited June 3 by a6blacked007
Steve Q Posted June 3 Posted June 3 From the lok.of it Yiu need to replace the maf sensor. Is it running rough? 1
a6blacked007 Posted June 4 Author Posted June 4 9 hours ago, Steve Q said: From the lok.of it Yiu need to replace the maf sensor. Is it running rough? No, Steve is running perfectly, tbh I thought by trying me friends, maf, yesterday fault would clear as he has same engine but it never cleared with carista
Steve Q Posted June 4 Posted June 4 5 minutes ago, a6blacked007 said: No, Steve is running perfectly, tbh I thought by trying me friends, maf, yesterday fault would clear as he has same engine but it never cleared with carista Good way of diagnosing it. Shame it's not maf then.
a6blacked007 Posted June 4 Author Posted June 4 (edited) Cleaned maf and map with brake cleaner along with no1 02 sensor Steve don't want to go throwing parts at it as these sensors are expensive but sure where too look next. Wondering if maf needed a drive to confirm flow as I just fitted and started car then removed ... Edited June 4 by a6blacked007
Stevey Y Posted June 4 Posted June 4 5 hours ago, a6blacked007 said: Cleaned maf and map with brake cleaner along with no1 02 sensor Steve don't want to go throwing parts at it as these sensors are expensive but sure where too look next. Wondering if maf needed a drive to confirm flow as I just fitted and started car then removed ... Hi its most likely the oxygen sensor, problem being when you put the other MAF on it will need re adaption and cleaning both with brake cleaner wont help, contact cleaner is better as it wont strip the coating off the MAF diode, the o2 sensor is the same as its coated inside with palladium and other precious metals but if the heater is going no amount of cleaning will cure it, with regard to throwing money away a new sensor is not that expensive but still needs adaption when fitted. Steve.
a6blacked007 Posted June 4 Author Posted June 4 (edited) Ho Steve thanks for your reply that code only came up because a ran car with sensor unplugged and removed from exhaust off car cleared after reinstalled but 02 sensor running rich has always been there since I have owned car ... Do you think replacing o2 sensor would be best to do 1st Regards mark Edited June 4 by a6blacked007
a6blacked007 Posted June 4 Author Posted June 4 Hi going through carista air mass value is stuck on 249.99
Stevey Y Posted June 4 Posted June 4 40 minutes ago, a6blacked007 said: Hi going through carista air mass value is stuck on 249.99 Hi if both items have been on the car since new it might be worth changing both for Bosch units, O.E. on average most oxygen sensors and MAFs only last about 80k or three years and gradually go what's known as blind the o2 sensor especially, the MAF heats up and measures how long it takes to cool giving a raw value of the speed and ambient air temperature coming in, the 02 sensor does exactly the same thing but because of the precious metal coating inside it only measures the oxygen level in the exhaust gas stream, both are easy to change but will need re adaption to learn new values. Steve. 1
a6blacked007 Posted June 4 Author Posted June 4 (edited) Cheers Steve.... Funny enough since cleaning oxygen sensor that fault code has not returned.... just maf .. Edited June 4 by a6blacked007
Stevey Y Posted June 5 Posted June 5 On 6/4/2024 at 6:36 PM, a6blacked007 said: What do you think of hella maf units Hi anything Bosch/Hella you can't go wrong as most of their stuff was used O.E., I had Hella boost and Dpf pressure sensors when I changed mine and you could see where the extra money went, to quote one of Magnets favourite sayings, buy once buy right it is true good advice. Steve. 1
a6blacked007 Posted June 16 Author Posted June 16 (edited) So its all been checked and wiring maf and other components are fine so possible ecu issue (audi specialist) Anyone know how to remove internal ecu from case Edited June 16 by a6blacked007
a6blacked007 Posted June 16 Author Posted June 16 (edited) How to remove x2 circled red sections without damage ? Seems like what's holding it in place the silver weld. Local electrician is giving a look before a pay £499 for new unit Edited June 16 by a6blacked007
Stevey Y Posted June 16 Posted June 16 11 minutes ago, a6blacked007 said: So its all been checked and wiring maf and other components are fine so possible ecu issue (audi specialist) Anyone know how to remove internal ecu from case Hi they are tamper proof screws they are normally drilled out but a word to the wise only touch anything in there while wearing latex gloves as the sweat on your fingers will kill things. Steve. 1
a6blacked007 Posted June 16 Author Posted June 16 33 minutes ago, Stevey Y said: Hi they are tamper proof screws they are normally drilled out but a word to the wise only touch anything in there while wearing latex gloves as the sweat on your fingers will kill things. Steve. Cheers Steve appreciated
a6blacked007 Posted June 17 Author Posted June 17 The electrical guy couldn't remove unit ( done more harm then good ) so it's away to be cloned posted down to Cornwall.
a6blacked007 Posted June 20 Author Posted June 20 End to the story was ecu replacement fitted all is well ....
Stevey Y Posted June 20 Posted June 20 5 hours ago, a6blacked007 said: End to the story was ecu replacement fitted all is well .... Hi I am pleased you found the final solution, yes its a lot of money but at least you now have peace of mind and a warranty. Steve. 1
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now