Help me brainstorm about our engine coolant system to solve my issue
Thread Starter
Junior Member
Joined: Oct 2004
Posts: 537
Likes: 0
Help me brainstorm about our engine coolant system to solve my issue
Code 2181: engine coolant performance.
I am pretty sure (well really just a guess) that the car is setting that code because the engine is not heating up fast enough. I had a similar code in my Lightning because i had the wrong thermostat in it so that is where my guess is from. So I am told our car had several temp sensors and 2 thermostats. Now is each sensor in charge of monitoring a differnt temp reading for various parts of the car? And to the 2 seperate thermostats monitor 2 different areas in the coolant system?
I really think my issue is a simple fix just have to figure it out, which sensor or which thermostat. According to my dealer they have replaced one sensor and one thermostat and still no luck. does anyone know what sensor or thermostat monitors engine warm up? I guess it is not closing the thermostat fast enough.
I am pretty sure (well really just a guess) that the car is setting that code because the engine is not heating up fast enough. I had a similar code in my Lightning because i had the wrong thermostat in it so that is where my guess is from. So I am told our car had several temp sensors and 2 thermostats. Now is each sensor in charge of monitoring a differnt temp reading for various parts of the car? And to the 2 seperate thermostats monitor 2 different areas in the coolant system?
I really think my issue is a simple fix just have to figure it out, which sensor or which thermostat. According to my dealer they have replaced one sensor and one thermostat and still no luck. does anyone know what sensor or thermostat monitors engine warm up? I guess it is not closing the thermostat fast enough.
AudiWorld Super User
Joined: Jun 2003
Posts: 17,509
Likes: 0
All of the sensors monitor for a portion of the heat flow .....
We have three radiators. Each one comes from slightly different paths with the exception of the pasanagers side once which is only for the generator and oil cooler but returns the coolant back to the master system when cooled. Any of those little sensors could be bad cuasing a bad reading. They should be able to do output tests on the sensors which should lead them to a possible faulty sensor.
AudiWorld Super User
Joined: Jun 2003
Posts: 17,509
Likes: 0
Yes but they are seperate from the coolant sensors
Coolant leaves from several places in the block but only enters in one place. A long they way it has several thermostats and at least 5 other sensors.
Thread
Thread Starter
Forum
Replies
Last Post
myers1.8TQ
A4 (B5 Platform) Discussion
6
Jul 24, 2008 06:39 AM
golfindaily
S4 / RS4 (B5 Platform) Discussion
4
Oct 10, 2007 07:35 AM
mthomas
A4 (B6 Platform) Discussion
11
May 1, 2006 05:17 AM
zeems
Audi 90 / 80 / Coupe quattro / Cabriolet
5
Mar 1, 2004 05:21 PM
