Power Steering Warning Light on a Audi A5
Have this checked promptly. It is not an immediate stop, but do not ignore it for long.
What the Power Steering Warning Light Means on a Audi A5
The power steering warning light on a Audi A5 means the assist system has a fault. Steering may suddenly become much heavier, especially at low speed and when parking, so it is important to address quickly.
How Urgent Is the Power Steering Warning Light?
In terms of priority, treat this as a high concern on your Audi A5. The single most useful thing you can observe is whether the Power Steering Warning Light is steady or blinking: a steady light generally allows a careful drive to a safe location or a workshop, whereas a flashing light signals an active fault that can cause damage if you continue. Pay attention to changes in how the Audi A5 drives, sounds, or smells, since those symptoms sharpen the diagnosis considerably.
Common Symptoms Alongside the Power Steering Warning Light
Alongside the Power Steering Warning Light, Audi A5 owners commonly report a handful of related signs. Some are obvious, others easy to miss until you pay attention. Keeping a short mental (or written) log of what the Audi A5 does when the light is on gives whoever performs the repair a huge head start and can save you money on diagnostic time.
- Steering suddenly feels heavy
- Whining noise when turning (hydraulic systems)
- Warning message about steering assist
- Light appears after a restart
What Causes the Power Steering Warning Light to Come On?
Why did the Power Steering Warning Light come on in your Audi A5? The honest answer is 'it depends', but the possibilities cluster into a recognisable set of causes. Knowing them in advance means you will not be caught off guard by a diagnosis, and it lets you sanity-check any repair quote against what commonly goes wrong on the Audi A5.
- Low power steering fluid (hydraulic systems)
- Electronic power steering module fault
- Low battery/charging voltage
- Steering angle sensor fault
- Failed power steering pump
How to Fix the Power Steering Warning Light on a Audi A5
Fixing the Power Steering Warning Light on a Audi A5 is methodical, not mysterious. Start with the quick, no-cost checks, then let the vehicle's own trouble codes guide you toward the specific system at fault. The ordered steps here are designed so that by the time you (or your technician) reach the more involved work, you have already eliminated the easy explanations.
- On hydraulic systems, check the power steering fluid level
- Try switching the engine off and on to reset a temporary fault
- Scan for steering system codes
- Address the specific fault (fluid, sensor, or module)
- Have an electronic system diagnosed if the light returns
Is It Safe to Drive With the Power Steering Warning Light On?
Whether it is safe to keep driving your Audi A5 with the Power Steering Warning Light on comes down to urgency (high) and behaviour. As a rule, if the light is red or flashing, or the Audi A5 is running poorly, stop somewhere safe and arrange help rather than pushing on. If the light is amber and the car drives normally, you generally have time to reach a workshop — but 'have time' is not the same as 'ignore it', so book a check promptly.
Diagnostic Trouble Codes Linked to the Power Steering Warning Light
If you scan a Audi A5 showing this light, these are the OBD-II trouble codes most commonly associated with it. The code you actually retrieve is what pinpoints the repair.
| Code | Meaning |
|---|---|
U0100 |
Lost Communication With ECM/PCM A control module has lost communication on the CAN bus, which can trigger multiple warning lights. |
Professional Mechanic Tips
If steering goes heavy on a Audi A5, you have not lost control — just grip firmly and allow extra effort, especially when parking. Slow down and get it checked soon.
On modern electric power steering, a weak battery or bad connection often triggers this. Test charging voltage before condemning the steering rack.
Frequently Asked Questions
Why is the Power Steering Warning Light on in my Audi A5?
On a Audi A5, the Power Steering Warning Light comes on because a monitored value crossed a threshold the car considers abnormal. It could be a simple, inexpensive cause or a genuine fault — the only way to be sure is to scan the vehicle and interpret the codes rather than guess from the symbol alone.
Can I keep driving with the Power Steering Warning Light on?
For a Audi A5, a steady amber Power Steering Warning Light with normal driving generally allows a careful trip to a garage. A red or flashing light, or any change in performance, means you should stop and avoid further driving until the fault is identified.
How much does it cost to fix the Power Steering Warning Light on a Audi A5?
Repair cost for the Power Steering Warning Light on your Audi A5 depends entirely on the root cause. Because the same symbol covers cheap and expensive faults alike, a proper scan-based diagnosis is the best money you can spend — it turns a guess into a precise, fair quote.
Will the Power Steering Warning Light reset itself on a Audi A5?
Occasionally, yes — a Audi A5 can extinguish the Power Steering Warning Light by itself when the monitored value returns to normal. But a light that keeps coming back is a clear sign of an unresolved issue that needs a proper diagnosis rather than repeated resets.