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.

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.

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. The climate display shows the ac compressor is off, although it is set to comfort. When I start driving and I get to 17 mph the ac starts to cool and the display shows it is on. So strange.

AVS Forum. Recommended Posts. If you have an account, sign in now to post with your account.

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. I did a code scan and P comes up. I replaced the relay for cooling fan 1 and no change.

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. The automobile fault code p can be caused by a faulty fan control relay, open or shorted fan control relay harness, poor electrical connection in the fan control relay circuit, faulty cooling fan 1, open or shorted cooling fan harness, or poor electrical connection in the cooling fan circuit.

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.

Jessalyn gilsig nude

Sort by Oldest first Oldest first Newest first Most reactions. Could it be a grounding issue? Yesterday morning my radiator fans were running even though the truck hadn't been driven since the afternoon before and the engine was cool. Come join the discussion about performance, modifications, classifieds, troubleshooting, maintenance, and more! I hope not. Defective cooling fan 1 Fan control relay failure Damaged coolant temperature sensor Fan circuit has bad electrical connection Frayed AC selector switch Inoperative vehicle speed sensor. The coolant level looks good, and the 12V battery tested good. Bad pcm? RayVoy 27 Replies. JavaScript is disabled. Steps to diagnose this error code are as follows:.

.

Or it may have gotten wet when I unplugged it. See the photos below. Week Month Year All Time. When I got home this evening, I installed the new relay and the fan did not start and has remained off till now. I checked this already and dried it out. When I plugged in my battery charger this morning, the fans instantly turned on. I did a code scan and P comes up. JavaScript is disabled. It seems this is a fairly common problem, and I followed recommendations I found. Could oil cause the sensor or harness to go bad? Since these all are controlled by the pcm, could they be related? Lucid Forum.