Is there possibly some obscure sensor located somewhere that could cause this? Any help on this would be greatly appreciated. Common Causes Common causes include a bad cooling fan motor or a faulty cooling fan relay. One part that is often recalled is the cooling fan relay and may therefore be the true issue. I have a 2007 chevy equinox lt 6 cylimder 3. Plus, they contain full trouble code descriptions and troubleshooting instructions.
For additional information, refer to Section 412-03. Go to Step 9 Go to Step 10 Repair the cooling fan clutch supply voltage circuit of the cooling fan clutch for a short to voltage. It can go bad even after only 3-5 years. If the fuses are in good condition, technicians will then look for the engine cooling fan relay and compare the voltage readings at the connector from the specifications provided by the manufacturer for the operation of the fan. Refer to Testing for Intermittent Conditions and Poor Connections and to Connector Repairs.
Refueling would be difficult as well, because air in the tank would have a difficult time escaping at the same time as new gas is being introduced via the fuel filler tube. The engine may start to run erratically, as well, due to the large vacuum leak you just created. Does the test lamp remain illuminated? Did you find and correct the condition? If there is a code stored and no service engine soon lamp, the code may be displayed as a pending code. P0495 - Cooling fan rpm too high. I want to know if I fix the P0496 issue will the other codes go away? But most common is fuel cap loose or bad. I think I would start with checking the purge valve to see if it is closed when its disconnected. Tiny charcoal particles could get stuck in the Purge Valve, leading the system to erroneously indicate purge problems and leak problems.
I was fighting a stiff headwind 25-30 mph for about four hours when the code turned on. Did you complete the replacement? Disconnect the cooling fan clutch harness connector at the shroud. Some vehicles may even require multiple drive cycles around three for the Service Engine Soon Check Engine lamp to light up. These are the codes that are required for basic emissions fault diagnosis. The electric fan clutch has a very high failure rate. Let me know if you have any questions. Could this be the cause of code? Below is the website I document things like this on.
For additional information, refer to Section 303-12. Those codes disappeared and the other three codes P04xx remained. I realize this question is old, but many people will search for it, so I am answering. If your notor sounds like a jet taking off all the time, this is the bad boy. Also the fans are controlled by the ecm computer and the engine coolant temperture sensor. What repairs can fix the P0495 code? Shorted circuits and damaged fuses and relays must be repaired, if not replaced.
Another symptom often found when this occurs, is a very loud fan noise, similar to Semi and has even been described by some customers as sounding like a jet engine! He wasnt much help when it came to telling me what that code meant. Sep 28, 2009 P0440 - Evap system large leak. Did you complete the replacement? It is crucial to perform a thorough and correct diagnosis of this error code before replacing any components, such as the cooling fan motors. One line should always have vacuum when the engine is running. Step Action Yes No Schematic Reference: Engine Cooling Schematics Connector End View Reference: Cooling System Connector End Views 1 Did you perform the Engine Cooling Diagnostic System Check? Does the cooling fan rotate freely? How serious is the P0495 code? However, also includes disassembly instructions for interior trim panels and exterior items like headlights and tail lights. Remove the upper radiator hose.
As a backup, I also plan to change the vapor canister as it detected a small leak. What are the common causes of code P0496? Symptoms Symptoms will likely be limited to only service engine soon lamp illumination and a stored code. Go to Step 14 -- Replace the cooling fan clutch. I was also getting 15 mpg, which I consider acceptable for driving 75 mph into strong wind. If you cannot stop it then you have a bad clutch. Along with the air conditioning system.
Final Step: In the definitions listed below, there is a test drive recommended after you've completed any repairs to see if the condition is fixed. At ten years of age, you may have corrosion and sticking in the vent valve, which would cause problems with purging. Hopefully this helps Jul 18, 2009. Refer to Control Module References for replacement, setup, and programming. It should move some when you spin it by hand but have a good amount of pressure to it and when you let go of it it when you spin it, it should stop almost immediately. Optimizing this mixture means better fuel economy and fewer exhaust emissions. Did you find and correct the condition? Also, make sure you are using a good factory gas cap.
Or should I order a new fan clutch and plan for its inevitable demise? Some vehicles require multiple drive cycles usually three for the service engine soon lamp to be illuminated. It is the big grey-metal looking thing with heat fins that the plastic radiator fan is bolted to. Less common causes include corroded or loose electrical connectors, a faulty engine coolant temperature sensor, and open or shorted electrical wiring often resulting in a blown fuse. One of those hoses goes to the engine, and the other comes from the charcoal canister. I have driven about 15 miles since changing it.