Hello to eveyone, My 2001 Vw jetta can't cool down his temperature. When I start the engine (when totally cold), it runs normally until it gets 90 degrees, stay at this temperature for about 30 to 45mns and then starts to over heat at 95, 100 5o 110 degrees when I accelerate (but never gets the red line). I cheked the coolant, there is no leak, I cheked the fans, they run perfectly at the first and second speed. They start turning at the right time (first and second speed), the fan control module works very well, (my A/C works fine until the temperature rises). I realized when I turn off the engine, the fans don't keep running as they used to. After a few while, when I turn the switch to ON (without starting the car), the indicator shows 110, 120 degrees and the fans start to run at the second speed. Can anyone tell me what is my problem??
- If you need clarification, ask it in the comment box above.
- Better answers use proper spelling and grammar.
- Provide details, support with references or personal experience.
Tell us some more! Your answer needs to include more details to help people.You can't post answers that contain an email address.Please enter a valid email address.The email address entered is already associated to an account.Login to postPlease use English characters only.
Tip: The max point reward for answering a question is 15.
P0011 - Camshaft positioning sensor P2181 - Engine cooling temperature sensor. If you have a repair manual (chilton/haynes/etc) these should be fairly simple fixes. Camshaft positioning sensor for my car was $35 and took about 15 minutes to change.
2carpros.com suggested the P2181 is also fairly easy to replace http://www.2carpros.com/questions/volkswagen-jetta-2004-volkswagen-jetta-code-p2181-engine-cooling-performance
Replace bad Engine Coolant Temperature (ECT) sensor. ECT sensor is placed in the right back side of the cylinder head on 2002 VW Jetta 1.9 TDI. See picture below:
Replace the Engine Coolant Temperature (ECT) sensor. ECT sensor is placed in the right back side of the cylinder head on 2002 VW Jetta 1.9 TDI. See picture below:
In addition to the 4 primary glow plugs, the cooling system also has 3 Coolant Glow Plugs to help provide extra heat to the cooling system in order to warm-up the vehicle's interior more quickly, and enhance overall engine warm-up time. (Example - Some Mercedes diesel engines use electrical heaters in the cabin because their engine is so thermally efficient.) Likewise, this auxiliary source of heat from the 3 Coolant Glow Plugs is necessary because of the VW 1.9 TDI engines outstanding efficiency, which wastes very little heat.
The 3 Auxiliary Coolant Glow Plugs are located at the end of the aluminum cylinder head (in a protruding flange) directly below the vacuum (brake booster) pump, which also connects to a coolant hose.
The 3 Auxiliary Coolant Glow Plugs use two (underhood) relays which are monitored and controlled by the ECU. During a cold start, the vehicle's interior temperature selector switch helps the ECU choose one of three modes depending on the amount of heat required to warm-up the coolant.
For example, Coolant Glow Plug #1 can be selected to operate all by itself, or #2 and #3 can operate together as a two-some, or lastly, all three glow plugs can form a triple source of heat for maximum enhancement of engine warm-up time.
After the engine is completely warmed up and the thermostat is open, the Coolant Glow Plugs normally shut-off and remain off unless the (thermally efficent) engine cools down sufficiently to have the computer signal them to come back on to keep the engine and cabin air warm. Extensive idling times at stop lights or in the driveway are scenarios where these glow plugs are most likely to recycle on and off.
In conclusion, the period of Preglow and Afterglow is determined by the engine's coolant temperature (during a cold or hot start), which helps the ECU select a predetermined time-cycle for the combustion chamber and / or Auxiliary Coolant Glow Plugs to follow.
Finally, one myth that needs to be immediately debunked, is the belief that the TDI's advanced Glow Plug System is linked to the opening of the driver's side door, which is false! It is also noteworthy to mention that some earlier VW diesel glow plug systems were operated in this manner, but not so with the advanced VW Jetta 1.9 TDI engine.
haynes is the best manule on the market
go to local book store and spend 30 bucks you will be glad you did they v[come with pics and every thing
indigo books is allways a good start
×