How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask RS4 Tech Your Own Question
RS4 Tech
RS4 Tech, ASE Certified Technician
Category: VW
Satisfied Customers: 179
Experience:  10 years experience in an Audi/VW Dealership
46408773
Type Your VW Question Here...
RS4 Tech is online now
A new question is answered every 9 seconds

01 passat 1.8t amw no spark,injector pulse ok,code P0686.

This answer was rated:

01 passat 1.8t amw no spark,injector pulse ok,code P0686.

Hello and welcome to Just Answer,

 

The code P0686 refers to the power supply relay. This relay controls many things and among them is the ignition coil module. I would first start by checking all fuses, including those that are mounted to the bottom of the relay panel under the dash. Fuse 29 in the fuse panel on the drivers side of the dash controls the ignition system power. There are also fuses in the ECM box located under the hood on the drivers side under the wipers. This is also where the power supply relay is located at, it should be marked with a 219 on the top of it. I hope this information has helped and if it has please click on the accept button as that is the only way I am compensated for my time and knowledge.

 

Sincerely,

George

RS4 Tech and 4 other VW Specialists are ready to help you
Customer: replied 6 years ago.
I traced the power failure to relay #373 in the ecm box.Thank for your help.You were on the right track. Eric

Eric,

 

I am glad I could help. If you ever have questions in the future feel free to request me.

 

Sincerely,

George