[Alfsdad516]

Hi I have a 2014 a5 1.8tfsi auto

I have an engine management light on. Thats on all the time.

The epc light is also on but only under certain circumstances.

When you put the fob into the ignition you have to push the brake pedal in order for it to start.

If I put the fob in whilst having foot on brake pedal the car fires up no trouble. The epc light comes on and goes off as it should.

If I try and start the car with out foot on brake pedal so the needles do a gauge sweep then put foot on pedal and push fob the car fires up but the epc light stays on until I turn car off.

The car runs and drives as it should if you start it either way. Serviced 2 days ago.

Has anybody ever had this before and if so what was the cause?

Thanks

 

[Alex1990]

Your post is all over the place. You mention EPC and then engine management light? Both are different.

EML is always on when in ACC mode. That’s not exclusive to Audi… that’s almost every car manufacturer on this planet. Once you turn the engine itself on, the car does its check and within several seconds the EML turns off. I have no idea about your EPC, and if that’s on then get the car scanned.

Anyways hope it helps.

~Alex

 

[Alfsdad516]

Hi,

Thanks for the reply.

What is ACC mode?

Scanned it and it says code p2556

 

[nigelbat]

ACC is just on not start

 

[Alfsdad516]

Ok thank you.

Turns out P2556 - Engine Coolant Level Sensor/Switch: Electrical Malfunction is the code that is logged.

Would this make the epc stay on?

 

[Alex1990]

Hi,

Thanks for the reply.

What is ACC mode?

Scanned it and it says code p2556

Could be thermostat …

Worth swapping out as its cheap depending on your DIY skills and also model version of car you own.

~Alex

 

[Alfsdad516]

Would you know where it would be

 

[Alfsdad516]

Solved the problem. The water pump was leaking onto the loom causing a short. All the codes were relating to the same 5v circuit.

Replaced the water pump hosing and thermostat. Works perfectly now