The warning error, “Front Left Turn Signal Defective. See Owner’s Manual,” illuminating on your Audi’s dashboard can be an unexpected pain to deal with, but following our tips and tricks can help you get out of this situation in no time. Before addressing the problem at hand, you can start by learning about the relevant features of your specific vehicle.
The Audi 5Q and SQ5 are compact luxury SUVs, offering a range of impressive features with stark differences in terms of driver preferences. Available in various engines and trim levels, the Q5 is designed to support varying driver needs. While the SQ5 takes everything great from the Audi Q5, adding a sportier edge to it, perfect for Audi fans looking for something with versatile driving dynamics.
Audi introduced Matrix LED headlights in 2013, making an appearance in the Q5 and SQ5 with LED taillights and dynamic turn signals. Popular due to its innovation, these features gained mixed reactions from Audi Q5 and SQ5 drivers. Let’s take a closer look.
What are LED Matrix Headlights in Audi?
Audi achieved the pinnacle of automotive lighting technology with its digital Matrix LED headlights, along with LED taillights with dynamic turn signals. These turn signals blink sequentially in the intended direction, along with an in-motion directional light present below. An error with these turn signals can eventually lead to complete failure, significantly compromising driver performance and safety.
What Does the “Front Left Turn Signal Defective. See Owner's Manual” Warning Mean?
If you see the warning message, “Front Left Turn Signal Defective. See Owner’s Manual,” on your dashboard, it means your vehicle has identified a potential malfunction with the left turn signal. In turn, you may experience some interconnected symptoms that can offer more information on how to troubleshoot the issue.
Symptoms of Turn Signal Failure
Potential symptoms that you need to watch out for are:
- A turn signal that blinks too fast or too slow
- The turn signal works only on one side
- Complete loss of turn signal function
- A warning message is visible on the dashboard
In addition to these symptoms, you may observe some common Audi Q5 SQ5 FY warning messages:
- Audi adaptive light: fault. See Owner's Manual
- Front left turn signal defective. See owner's manual
- Front right turn signal defective See owner's manual
- Front left side marker light defective. See Owner's manual
- Front right side marker light defective. See Owner's manual
- Left side light daytime running light defective. See owner's manual
- Right side light/daytime running light defective. See owner's manual
The most common VW Volkswagen Touareg CR7 MK3 warning messages
- Please check left daytime running light parking light
- Please check right daytime running light parking light
- Please check left front turn signal
- Please check right front turn signal
If left ignored, the underlying problem can trigger interconnected lighting components to malfunction, such as daytime running lights, LED headlights, and both turn lights. To prevent this chain reaction from occurring, it’s essential to understand why the warning message appeared in the first place.
Causes of Turn Light Failure
The warning message, “Front Left Turn Signal Defective. Check Owner’s Manual,” can stem from a range of issues, including blown fuses, faulty relays, defective switches, or a damaged Continental light control module. If the internal components appear to be in fine working order, the warning message may point to a damaged continental light control module, which can fail due to two reasons:
- Lifespan degradation: Light control modules are highly sensitive due to advanced sensors, connectors, and other internal components, which can degrade with constant wear and tear.
- External damage: A direct collision to the taillights can damage the internal components, cause brittle wires to break, and cause the warning message to appear.
Understanding the root cause can allow you to pinpoint the issue at hand, saving time and costs in the long run.
Diagnosing & Troubleshooting The Issue
If you are unable to identify the cause behind the warning error, your best resort would be a diagnostic tool, such as the OB2D scanner, that can tap into your vehicle's computerised system and pull out the diagnostic codes that specify the problem for you. If your diagnostic codes refer to an issue with the Continental light control module, you can easily resolve the issue by purchasing a replacement part.
Our Continental Audi 80A907397D Light Control Module STD is a compatible replacement part for both Audi models, the Q5 and SQ5 FY. Before purchasing, make sure to confirm the part numbers of the faulty light control module with the new part. Diagnostic coding is mandatory after replacement to clear the error codes from the dashboard.
At Xenons4U, we’re not just car manufacturers but devoted car enthusiasts who take great pride in our work. All our products undergo rigorous testing to ensure we meet stringent standards and legal compliance. The UK Highway Code dictates the appropriate use of turn signals, leading to prosecution for failure to use them.
If you’re in the market for something other than Continental Audi 80A907397D Light Control Module STD, contact our technicians who provide a guaranteed, timely response.
Part Numbers & Compatibility List
This module fits a range of models, ensuring broad compatibility:
Audi part numbers
- 80A907397D
- 80A 907 397D
Continental part number:
- A2C74781014
- A2C74781009
More compatible part numbers:
- 80A907397A 80A 907 397A A2C75315714 A2C75315716
- 80A907397B 80A 907 397B A2C75315813 A2C75315808
- 80A907397C 80A 907 397C A2C75315908
Compatible Audi Q5 SQ5 FY Pre-Facelift LED Matrix Headlamps
- 80A941783F
- 80A941784F
- 80A.941.036.A
- 80A.941.036.A 80A941036A
- 6002TH0194
- 80A941035 80A.941.035
- 80A941036 80A.941.036
- 80A.941.035.A
- 80A941035A
- F00HTA700902
- LE14C6351
- 80A.941.784.A
- 80A941784A
- LE14A6351
- F00HTA901400
Compatible cars:
- Audi A8 D5 4N 2017 2018 2019 2020
- Audi Q5 SQ5 FY Sportback Pre-Facelift
- 2016 2017 2018 2019 2020
- S-Line Quattro
- VW Volkswagen Touareg CR7 MK3 III
- 2018 2019 2020
- 3.0 TDI diesel
- R-Line
