Mark_Reso

Hey Guys,

I've recently had the Emission Control System light on my dashboard turn on and stay lit in my Audi A4 Cabriolet (2004, V6).*

I've read the fault codes but am not that knowledgable so was hoping you guys knew what I'd have to expect if I were to bring it down to a mechanic.

Please find the fault codes listed below with a link to Ross-tech:

17645/P1237 - Fuel Injector for Cylinder 1 (N30): Open Circuit
17645/P1237 - Ross-Tech Wiki

16825/P0441/001089 - EVAP Emission Control Sys: Incorrect Flow
16825/P0441/001089 - Ross-Tech Wiki

18010/P1602/005634- Power Supply B+ Terminal 30: Voltage too Low
18010/P1602/005634 - Ross-Tech Wiki

This fault was also read under ABS but not related to Emission control system I believe:

01826 - Sensor for Steering Angle (G85); Supply Voltage Terminal 30
01826 - Ross-Tech Wiki

I'd really appreciate it if you guys could let me know what all this means, especially how much you think it may set me back and if these faults may be included in the price of a service?

Thanks guys, much appreciated.*

Mark_Reso

If anyone else has this problem I did the following as some codes read may have been historic:
After clearing the codes and driving for a bit the ECS sign didn't light up again and after rescanning no faults were found.

Mark_Reso

Here's another helpful answer I got so make sure you have a look at the battery:

"To start with I would concentrate on 01826 and 18010 as they are possibly the problem here. If the battery voltage drops too low then these codes are triggered. So best check the state of your battery as on a cold morning a huge current is taken by the starter motor and this may leave insufficient to power the other systems such as the ABS steering angle sensor.
A proper test should be done to see if the battery is good and then if it is the alternator output should be checked both off load and under load. Once you know these are all good, then clear the codes, drive the car and check again and see what comes back." -Hometune