What can cause a high cooling fan speed error in a 2002 Trailblazer?
: Either a PCM reprogram or the fan clutch asembly will fic this condition. Replacement of the fan clutch is very labor intensive, and it is easy to put a hole iin the radiator or break something else if you do not have experience doing this procedure. TechJK------------------------------------
These errors are caused by software problems in the PCM. General Motors warrants this defect for unlimited mileage. Take your vehicle to a dealer for a free PCM upgrade to correct this and NUMEROUS other concerns (stalling, high idle, high fan speed, shift problems)
This is garbage- GM will tell you get real- totally rubbish. The problem lies in their monopolized parts (Dealer stock item only) Common problem - expensive part (entire fan assembly) and labor- (entire front end disassembly) I paid appx. $600.00 for this error code to be cleared. Good luck!
EVERYONE SHOULD BE AWARE THAT IF YOUR PCM FAILS IT IS COVERED UNDER THE (LONG TERM) EMISSIONS WARRANTY. YOU DO NOT HAVE TO PAY TO HAVE IT REPLACED. IF THE DEALER WANTS YOU TO PAY FOR A NEW PCM THEN CALL THE 1 800 NUMBER FOR CHEVY (ON THE WEBSITE)
This two answers helped me a great deal. I had the exact same problem on my 2003 Trailblazer. The check engine light came on, I took my vehicle to autozone and they told me the code was P0495 (cooling fan speed high)but they did't know how to fix the problem. After loking at this two previous answers, I called the dealer and they told me that it would cost me $89.00 to reprogram my PCM. I took my vehicle to the dealer and before checking my vehicle, the mechanic noticed the noise my vehicle was making (like a jet engine) and told me that in addition to reprograming the PCM I needed to replaced the fan clutch. The total cost was going to be $747.00. I didn't have the money so I went home and looked on eBay. I purchase a brand new fan clutch for $130.00. I am not a mechanic and it took me about two hours to replaced the fan clutch. You need a 12" crescent tool to remove the fan clutch from the water pump pulley. After replacing the fan clutch, I was on my way to the dealer to reprogram the PCM but noticed that the vehicle was working great so I skip the dealer and went to the 7 eleven and got me a six pack to celebrate. My vehicle is working like new. I hope this could help somebody out there. Good luck
I have the EXACT same problem. My local Chevy dealer wants to charge me $800 to repair! I looked at the fan clutches on eBay (ZBRA) for $130. I noticed they have an electical connection but I couldn't quite see one on my clutch fan. Am I just not seeing the connection or is it possible that I don't have one. If I don't have a connection, is there a place to plug-in the new one? ALL 2002+ TRAILBLAZER/ENVOY/BRAVADA/SAAB 97X ETC HAVE A FAN CLUTCH ON THE I6 ATLAS ENGINE AND THERE IS ALWAYS AN ELECTRICAL CONECTOR TO IT. LOOK FOR A DANGLING WIRE THAT MAY JUST CONNECT TO A PLUG ON THE SHROUD.
P1484 - Cooling Fan System Performance Cooling fan rpm error. When I had that code it was accompanied by p0495 .. Which is cooling fan speed too high ... I changed the fan clutch because they are notarious for problems .. And then 3 days later changed the water pump .. Cost me about 250$ to do it myself ... The shop was gonna charge almost 1800$ haven't had a problem since!
How do you tell if your speedometer cable is broke or if its the instrument cluster in a 2005 trailblazer?
The cooling fan speed sensor itself is not the culprit. The visco electric fan clutch goes into a lock-up state and the sensor picks up the overspeed condition. Essentially the fluid silicone material inside goes hard and breaks up and then small pieces get stuck in the valve mechanisms. This causes the clutch to loose it's ability to release. www.trailvoy.com has all the answers about the Trailblazer/Envoy/Brava platform vehicles
Not really. Speed is not the only factor of road accidents, most of the time it is HUMAN ERROR. According to research, 80% of all fatal injury on Irish roads are due to driver error. As a matter of fact "speeding" is also part of a driver error. Other errors are: Reckless driving, drunk driving, unsafe lane change, etc.
Who should see about a recall on a 2005 Chevy trailblazer in KY faulty fuel gauge and messed up speed gauge who should you call about to see if there is a recall?
Some motors are specially designed for low speed. Some are "invertor Duty" classified so that they can be run on invertor (VFD) normally with a high heat dissipating design. On low speed the cooling effect reduces drastically since the cooling fan is mounted on the same motor shaft. Hence a separate small cooling fan is mounted on the motor, driven by separate power such that it keeps running at normal speed irrespective of main motor…
It is not so much of a failure but an Heading offset caused by "Speed Error" The speed error is an error generated when a vessel/aircraft in which a gyrocompass is installed transits a course other than east or west. Its value is determined depending on the ship's speed, course, and latitude. (It is not related to the kind or type of gyrocompass.) The north-seeking tendency of a gyrocompass is based on the earth's rotation…
Generally no. It depends on how broken the speedo is. A failed instrument will have no feedback to the management system. If however the speed sensor is the cause of failure, this is sometimes required for the management, to also determine speed and apply the correct fuelling and mapping. In this case, it could cause an error message on the EBDO and light a warning light.
What can cause an 04' Chevy Trailblazer with L6 engine to idle rpms over 2000 when engine is started up cold?
Where does the power wire from the fan motor on a 1994 Ford Escort LX connect to the fan control switch?
There is no fan control switch, and no direct connection to any sensor or switch on that vehicle. The system works like this. The computer(PCM) decides when to turn on the fan. The PCM looks at engine temperature from the ECT sensor, and AC input from the AC control head switches. When the PCM decides that you need the cooling fan to come on, it uses the cooling fan relay, and the cooling fan high…