P0480 code chevy silverado

I have a Tahoe 5. Since then, the cooling fan will run after I turn the vehicle off. Also my temperature gauge is fine, no overheating, p0480 code chevy silverado. I did a code scan and P comes up.

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.

P0480 code chevy silverado

Log in. Sign up. JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding. There is a check engine light that came on. The code came back with the P The coolant level looks good, and the 12V battery tested good. When I plug in the car to charge, the high speed blower fan comes on and does not turn off until I unplug it. This never happened before. The other thing I noticed is the air conditioning was not cooling when I turn on the car. The blower fan blows the air in the car.

I bought a single knock sensor from the auto parts store. The P code is detected when the Powertrain Control Module PCM detects that the commanded state of the driver and the actual state of the control circuit do not match, p0480 code chevy silverado.

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. The fan will not affect the way that the engine runs unless you start to overheat. If you overheat, the engine may start knocking , misfiring, or smoking. It can also cause the air conditioner to stop functioning properly. Once you start overheating, you may blow a head gasket and that requires a much more expensive repair.

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JavaScript is disabled. Cooling Fan Harness - Defective, corroded or broken wiring harness could also be a reason for creating this code. Vehicle Speed Sensor - A vehicle speed sensor generates a magnetic pulse in the form of a wave proportional to the speed of the vehicle. View attachment View attachment View attachment Important Information By using this site, you agree to our Terms of Use. All the required components to fix this code are just a click away on our website. Explore Our Forums. Make sure its efficient functionality to avoid all the related codes. Tomorrow I'm going to unplug the connecter again and inspect and make sure it fully dries out. Log in. Log in. Is there some kind of sleep mode that the truck goes into after that long? We jumped both fan motors again and one was Siezed while the other was definitely dragging. Display as a link instead. If the circuit has not closed or the relay has not clicked, the relay is bad.

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The fan that is not in front of the air conditioning condenser is the main cooling fan and the one to concentrate on initially. Posted December 6, Or, maybe there is a temporature sensor tripping it to come on. Jump the battery plus terminal in the first test with this switched terminal and place an additional jumper from the negative terminal on the relay to ground. Can i rule out coolant temp sensor and pcm? Parts are someone else's problem. Paladin 51 Replies. I stopped by the auto parts store and bought a relay and will put it in tonight. JavaScript is disabled. Repairs for this error code are not difficult and following repairs and replacements can actually help you to fix this code: Repair or replace the faulty cooling fan 1 Replace the frayed vehicle speed sensor Replace the inoperative AC pressure switch Repair the faulty electrical connections Repair or replace the defective fan wiring harness Replace the engine coolant temperature sensor Replace the faulty fan control relay All the required components to fix this code are just a click away on our website. For a better experience, please enable JavaScript in your browser before proceeding.