They just fixed the transmission on my 04 chevy trailblazer and when they hooked up the machine code P0506 idle control system (RPM too low) is this common or could it be something they forgot to re-set or didnt connect. the truck runs but it makes a noise as if the fan is hitting the cover but it isnt. can someone plz assist
Take it back and tell the repair shop that they need to correct the issues that are not right.
SOURCE: change brake light '04 Trailblazer
Hi this is a common problem in the trailblazer line the light brakes stop working on mine but it was really not the bulbs it was the socket I got a recall from Chevrolet to replace all the back lights with a new set but this did not fix the problem what happen is that the socket is not making a good connection with the bulb wires take one bulb out and you will see how the wires are black you can tell they got hot because they are not making a good connection and brake light stop working and to take then out open the rear gate and you will see the 2 screws for the tail light assembly once you get the assembly out you will see a 2 plastic connectors remove then and another 3 screws holding the light bulbs take those 3 screws out and then you can get to the light bulbs what I did to fix this problem I bend the wires in the bulb just a bit to make a better connection and avoid then to get hot once you get a bulb out of the socket you will be able to know better what I am talking about
SOURCE: idle problem on a 2006 chevy trailblazer 4.2
The code indicates an issue with the Throttle Actuator control. This is a little motor on the throttle body that opens the throttle plates at idle. That control motor may be bad and thus, causing a low idle.
I hope this helps.
SOURCE: Air will not blow out of dash vents on 04
Pull the HVAC B fuse located inside the truck for 5 min and then place it back in.The short time the fuse is out and placed back in, the control module will attempt to recalibrate all the actuators, by running them CW and CCW until they hit their stops. Then the control module remembers those positions and tries to not slam the actuators into the endpoints with vigor, to avoid breaking them.
Naturally, they messed up the programming, and the recalibration process is what breaks most of them after a battery discharge or swap.
When a recalibration fails, the control module just quits using that actuator and it's frozen in position. All the other ones are OK, though. What some Trailblazer owners do as a temporary solution, is to start the recalibration process with the fuse pull. Watch the actuator until it's in exactly one position that is useful, and then quick like a bunny yank the connector to that one actuator. It might be frozen in position, but you can choose a good one. The same trick is a lot less useful with temp actuators.
Thank you for using Fixya and might be a dead airflow mode actuator. Common problem.http://forums.trailvoy.com/attachment.php?attachmentid=505&d=1208022408
SOURCE: Got the codes P0506 and P1400 on an 07' 6-cyl
P0506 - Idle Air Control (IAC) System RPM Lower Than Expected
What does that mean?
This P0506 code is one that's sometimes triggered on vehicles that have electronic throttle control. That is, they don't have a regular throttle cable from the accelerator pedal to the engine. They rely on sensors and electronics to control the throttle. In this case, the P0506 DTC (diagnostic trouble code) is triggered when the PCM (powertrain control module) detects an engine idle speed that is lower than the desired (pre-programmed) RPM.
Potential Symptoms
Most likely the only thing you'll notice is the idle speed is lower than normal so it will likely be rougher. There are potentially other symptoms as well. Of course, when trouble codes are set, the MIL (malfunction indicator lamp, a.k.a. the check engine light) illuminates.
Causes
A P0506 DTC trouble code may be caused by one or more of the following:
* A vacuum leak
* An air restriction in the intake air path or exhuast
* A faulty positive crankcase ventilation (PCV) valve
* Damaged/failed/dirty throttle body
* Internal engine problem
* Failed PCM
Possible Solutions
This DTC is more of an informational code, so if there are any other codes set, diagnose them first. If there are no other codes, inspect for vacuum leaks, restrictions, and damage. If there are no symptoms other than the DTC itself, just clear the code and see whether it returns.
SOURCE: 04 trailblazer AC leaks
Rather than pay the dealer $350+ to fix this, I found the "L" shaped drain hose behind and interior to the front passenger tire (I let the car idle with the AC on and waited for a drip. On my back on groud I reached in and found the drain line and it came off i my hand and about 4 oz of water and some decayed matter floowed out. I reaced back in and found the hole to which the L line was attached. It was a rubber fitting on the end of a metal pipe. The fitting came off easily and then about 8 oz of water flowed out (carpet had been soaked for two days). I reattached the L drain line and noticed that inside the fitting was about 1/4 tsp of "mulch" - decayed leaves, pollen, etc. Reattacted the fitting and water now flows freely out the drain. And yes, its a very high humidity area - Houston, TX. And if you live anywhere near here you know about the intense yearly dispersion of Pine tree pollen. I thisnk that accelerates the blockage. Happen about every 2 years. (Third time for me. First two I let the dealer over charge me for this effort. BE SAFE WORKING UNDER YOUR CAR!
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