A4 (B5 Platform) Discussion Discussion forum for the B5 Audi A4 produced from 1995-2001 B5 FAQ

Ignition problems

Thread Tools
 
Search this Thread
 
Old Jul 16, 2010 | 01:49 PM
  #1  
legione6's Avatar
Thread Starter
AudiWorld Newcomer
 
Joined: Jul 2010
Posts: 7
Likes: 0
Default Ignition problems

Hi All,

I'm a newbie

I have an Audi A4 Avant 1.8t 110kw 150cv and i have an ignition problem.

When I try to turn the car, the engine start it, but after switch off itself.
The cause Could be a relay?
Where is the location of relays box?

What do you suggest me? Can you help me?

Thanks
Reply
Old Jul 16, 2010 | 04:54 PM
  #2  
AudiMick's Avatar
AudiWorld Super User
 
Joined: May 2002
Posts: 5,138
Likes: 4
From: Redmond WA
Default

Originally Posted by legione6
Hi All,

I'm a newbie

I have an Audi A4 Avant 1.8t 110kw 150cv and i have an ignition problem.

When I try to turn the car, the engine start it, but after switch off itself.
The cause Could be a relay?
Where is the location of relays box?

What do you suggest me? Can you help me?

Thanks
What year is your car? Does it have an immoblizer?
Reply
Old Jul 16, 2010 | 08:37 PM
  #3  
legione6's Avatar
Thread Starter
AudiWorld Newcomer
 
Joined: Jul 2010
Posts: 7
Likes: 0
Default

the year is 1995
Reply
Old Jul 16, 2010 | 08:43 PM
  #4  
legione6's Avatar
Thread Starter
AudiWorld Newcomer
 
Joined: Jul 2010
Posts: 7
Likes: 0
Default

Originally Posted by legione6
the year is 1995
ops.... yes... it has the immobilizer.
Reply
Old Jul 17, 2010 | 08:29 AM
  #5  
AudiMick's Avatar
AudiWorld Super User
 
Joined: May 2002
Posts: 5,138
Likes: 4
From: Redmond WA
Default

Originally Posted by legione6
ops.... yes... it has the immobilizer.
US cars didn't have that until 2001 and it a picture of the key in the cluster, it lights up and when the correct key is inserted it allows you to start the car.

This is not a US car so I don't know if it's the same, but typically the immobilizer will let the car start and then cut power after 5 seconds if the key is bad. Check your owners manual to see if there is supposed to be a light in the cluster when the key is inserted.

Could also be your ignition switch, they were recalled many times.

Not sure what relay you are talking about.
Reply
Old Jul 17, 2010 | 11:49 AM
  #6  
legione6's Avatar
Thread Starter
AudiWorld Newcomer
 
Joined: Jul 2010
Posts: 7
Likes: 0
Default

Originally Posted by AudiMick
US cars didn't have that until 2001 and it a picture of the key in the cluster, it lights up and when the correct key is inserted it allows you to start the car.

This is not a US car so I don't know if it's the same, but typically the immobilizer will let the car start and then cut power after 5 seconds if the key is bad. Check your owners manual to see if there is supposed to be a light in the cluster when the key is inserted.

Could also be your ignition switch, they were recalled many times.

Not sure what relay you are talking about.
Hi, thanks for your answer.

It is an italian car.
Today i noticed a thing. Sometime when I insert the key, the picture of a car with a key, blink and the car doesn't switch on.

If i try to switch on the car more times, it can switch on correctly without problems (the picture doesn't blink). the problem is random.

I have 3 keys.
1- Audi key, with a button. I don't know what it is used because this button doesn't open the car.
2- Audi key, without buttons.
3- Audi key, with picture of a wrench


The problem persist with all keys

Which is the difference between these keys?
The problem could be the key, or something else?

Thanks
Reply
Old Jul 17, 2010 | 11:51 AM
  #7  
legione6's Avatar
Thread Starter
AudiWorld Newcomer
 
Joined: Jul 2010
Posts: 7
Likes: 0
Default

i link you the photo of my keys
Reply
Old Jul 17, 2010 | 01:22 PM
  #8  
AudiMick's Avatar
AudiWorld Super User
 
Joined: May 2002
Posts: 5,138
Likes: 4
From: Redmond WA
Default

Originally Posted by legione6
i link you the photo of my keys
The one with the wrench is the valet key. It shouldn't open the trunk or glove box. It's for parking attendants and such so they can't get to your stuff .

The other two are regular Audi keys. There is an RFID chip inside all the keys (it is only on one side of the key), the signal is picked up by a receiver in a "ring" around the ignition lock.

If the car won't start turn it over 180 as the RFID chip is sometimes closer to the ring.Or the reception of the ring may be better one way than another.

Could be your keys or the ring is not picking up the RFID signal. Would be unusual for all three keys to be bad. However if the lock is worn I could see a situation where the key is not close enough to the receiver ring.

In the US you can order spare keys by VIN #, the Audi dealer has to enable the new key to your car.

These systems weren't implemented until 2000/2001 in the US (my 96 A4 had a standard key) so your car may be different.

I had a similar situation with our Toyota it would work only with the key in one way.
Reply
AudiWorld Stories

Bringing Audi to Life for Audi Fans

story-0

Audi Unveils Absurdly Cool New Supercar: 10 Things You Need to Know!

 Verdad Gallardo
story-1

The Highs & Lows of Every Audi C-Class Generation

 Joe Kucinski
story-2

Top 10 Most Expensive Audis Ever Sold on Bring-A-Trailer

 Brett Foote
story-3

10 Audi Features & Options We Miss the Most!

 Joe Kucinski
story-4

Audi Recreates Crazy-Looking Speed Record Breaker From 1935

 Verdad Gallardo
story-5

Coachbuilder Recreates the 1995 Audi TTS Concept

 Verdad Gallardo
story-6

Every Audi V10 Car Ranked!

 Joe Kucinski
story-7

9 Audi Designs That Aged Like Fine Wine

 Verdad Gallardo
story-8

2026 Audi Q5 Buyer's Guide (Every Model Explained)

 Brett Foote
story-9

Ranking Every Current Audi 'S' Model From Worst to First!

 Joe Kucinski
Old Jul 19, 2010 | 09:44 AM
  #9  
legione6's Avatar
Thread Starter
AudiWorld Newcomer
 
Joined: Jul 2010
Posts: 7
Likes: 0
Default

Thanks for your info. All your information is correct. Now i've understand the difference

Only one question. What does the button on the first key? Do you know it?

Thank you very much...
Reply
Old Jul 19, 2010 | 10:28 AM
  #10  
AudiMick's Avatar
AudiWorld Super User
 
Joined: May 2002
Posts: 5,138
Likes: 4
From: Redmond WA
Default

Originally Posted by legione6
Thanks for your info. All your information is correct. Now i've understand the difference

Only one question. What does the button on the first key? Do you know it?

Thank you very much...
I am pretty sure there is an LED light when you push the button to illuminate the lock. That was the way it was on my 96 A4 (built in June 95). If the light is not working probably either the bulb or battery needs replacing.
Reply



All times are GMT -8. The time now is 04:49 AM.

story-0
Audi Unveils Absurdly Cool New Supercar: 10 Things You Need to Know!

Slideshow: Limited to just 499 units, the 987-horsepower halo car signals a new chapter for Audi performance.

By Verdad Gallardo | 2026-06-04 17:37:15


VIEW MORE
story-1
The Highs & Lows of Every Audi C-Class Generation

Slideshow: The highs and lows of every Audi C-Class generation.

By Joe Kucinski | 2026-05-27 16:05:50


VIEW MORE
story-2
Top 10 Most Expensive Audis Ever Sold on Bring-A-Trailer

People were more than happy to shell out big bucks for these cars.

By Brett Foote | 2026-05-27 15:32:23


VIEW MORE
story-3
10 Audi Features & Options We Miss the Most!

Slideshow: 10 Audi features and options we miss the most.

By Joe Kucinski | 2026-05-12 19:33:47


VIEW MORE
story-4
Audi Recreates Crazy-Looking Speed Record Breaker From 1935

Slideshow: Audi has recreated one of the wildest machines of the pre-war speed-record era, reviving a streamlined V16 racer that originally exceeded 200 mph in 1935.

By Verdad Gallardo | 2026-05-11 09:49:34


VIEW MORE
story-5
Coachbuilder Recreates the 1995 Audi TTS Concept

Slideshow: A Dutch coachbuilder has reimagined the original Audi TT by finishing what the 1995 concept only hinted at.

By Verdad Gallardo | 2026-05-05 15:17:58


VIEW MORE
story-6
Every Audi V10 Car Ranked!

Slideshow: Ranking every Audi V10 road car

By Joe Kucinski | 2026-04-29 16:11:56


VIEW MORE
story-7
9 Audi Designs That Aged Like Fine Wine

Slideshow: A look back at the Audis that didn't just survive changing tastes, they quietly outgrew them.

By Verdad Gallardo | 2026-04-28 19:38:27


VIEW MORE
story-8
2026 Audi Q5 Buyer's Guide (Every Model Explained)

One year off a full redesign, the best-selling Q5 is getting a few more updates.

By Brett Foote | 2026-04-17 09:56:19


VIEW MORE
story-9
Ranking Every Current Audi 'S' Model From Worst to First!

Slideshow: Ranking every current Audi 'S' model on sale today from worst to best.

By Joe Kucinski | 2026-04-16 10:28:28


VIEW MORE