Why does my 1998 Audi A3 1.8 Turbo idle high?

1998 AUDI A3
100,000 MILES
Avatar
SIMONBAKER82
  • MEMBER
  • 3 POSTS
When my car is up to temperature it idles at around 1200rpm, it should be well under 1000rpm. Under full throttle it blows a little black smoke indicating that it may be running a bit rich?

An engine scan has brought up an error with the throttle body. My mechanic has recommended that the throttle body be replaced along with the coolant temperature sensor.

Does this seem like the right thing to do?

Thanks
Apr 21, 2012 at 2:34 AM
Advertisement
Avatar
JACOBANDNICKOLAS
  • ✓ASE Certified Mechanic
  • 110,194 POSTS
  • ASE Certified Mechanic
I would need to know what code. This vehicle shouldn't need a new throttle body at 100K
Apr 21, 2012 at 2:40 AM
Avatar
SIMONBAKER82
  • MEMBER
  • 3 POSTS
three codes came up as per below:

17967 P1559 035
Throttle valvle control part-J338-
Malfunction in basic settings

17973 P1565 035
Throttle valve control part-J338-
lower stop not reached

16500 P0116 035
Engine coolant temperature sensor 1
Circuit Range/Performance
Sporadic
Apr 21, 2012 at 3:04 AM
Avatar
JACOBANDNICKOLAS
  • ✓ASE Certified Mechanic
  • 110,194 POSTS
  • ASE Certified Mechanic
I would recommend you start by checking the coolant sensor. It could cause the other settings to be off.
Apr 21, 2012 at 9:32 PM
Avatar
SIMONBAKER82
  • MEMBER
  • 3 POSTS
Ok, thanks so much for the advice. So can the coolant sensor be changed easily without draining the coolant? Is this a job I should attempt myself or get a mechanic to do? Also roughly where is the sensor located?
Apr 21, 2012 at 11:05 PM
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.
Ask a Free Question
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.