P0480 code chevy silverado

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Log in. Sign up. JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding. There has been a check engine light for a few weeks, but the truck has been driving fine so I wasn't too worried.

P0480 code chevy silverado

It indicates that PCM has detected an incorrect amount of voltage high or low in the electric cooling fan control circuit. If you discover this code, then stop driving the vehicle till the code is rectified. While driving a vehicle an adequate amount of air goes through the radiator, which viably cools the engine but when we stop the vehicle or when it is in idle mode then no air is passing through the radiator and the engine begins to increase in temperature. The PCM recognize the raise in engine temperature with the help of coolant temperature sensor positioned near the thermostat. When the temperature reaches about degrees F, the PCM will command the cooling fan relay to turn on the fan. When the PCM try to activate the fan and discover the command and the result do not match, the code is set. Due to inoperative fan you may only feel the overheated vehicle and in some cases, there may be performance problems as well. Some other common symptoms include:. If you detect error code P and the fans are not operating then the vehicle should not be driven as it may cause overheating which ultimately leads to engine damage or the engine to fail entirely. Repairs for this error code are not difficult and following repairs and replacements can actually help you to fix this code:. All the required components to fix this code are just a click away on our website.

The warning went away, and so did the code at the time.

Log in. Sign up. JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding. It had a cracked Y fitting in the junction of the water pump, coolant resevoir, and line going to firewall heater core maybe? I found 2 40 amp fuses for the fans that were friend, and I tested the relays by energizing the relay listening for a click and testing for no resistance.

The fault code P might be the culprit. This code indicates a problem with the fan control relay or its circuit. Symptoms can include an overheating engine or the cooling fan not working at all. The cause could be a faulty relay, a damaged wiring harness, or poor electrical connections. To fix the issue, visually inspect the wiring and connectors for any damage or corrosion. Check for broken or bent pins as well. This repair is of moderate difficulty and should take around 1.

P0480 code chevy silverado

Here is the definition of P for the Chevy Silverado, broken down by its two major parts:. Modern vehicles are equipped with electric cooling fans. They are activated by the PCM powertrain control module , whenever your Silverado reaches a certain temperature. One or both of them will also come on when the air conditioner is running. With P your Silverado should not drive any different.

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Clear editor. Posted December 6, Just do these codes in the order given. Additionally, many vehicles have multi-speed fans requiring as many as three fan speed relays for low, medium and high. It had a cracked Y fitting in the junction of the water pump, coolant resevoir, and line going to firewall heater core maybe? Explore Our Forums. Please consider creating a new thread. Check it with the ohmmeter, there should be a big change in resistance, if not the sensor is bad. When I got home this evening, I installed the new relay and the fan did not start and has remained off till now. We jumped both fan motors again and one was Siezed while the other was definitely dragging. I used a heat gun to dry up the plug and added a little dielectric grease. Insert image from URL.

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When the temperature reaches about degrees F, the PCM will command the cooling fan relay to turn on the fan. I do use my fair share of aftermarket parts, but never on anything complicated or anything requiring a lot of labor. Sign In Sign Up. Week Month Year All Time. It smelled like burnt electrical and one fan seemed to be smoking from inside the fan itself. Go to topic listing. Display as a link instead. For a better experience, please enable JavaScript in your browser before proceeding. Tomorrow I'm going to unplug the connecter again and inspect and make sure it fully dries out. Also my temperature gauge is fine, no overheating.