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Possible causes
- Faulty fan control relay
- Faulty cooling fan 2
- Fan control relay harness is open or shorted
- Fan control relay circuit poor electrical connection
- Fan cooling fan harness is open or shorted
- Fan cooling fan circuit poor electrical connection
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Question edited for clarity.
Question moved to model category
Well the first thing that leapt of the page was that you said you had two batteries and you undid the clamps to both, but then I realised to meant you undid both clamps to one battery. That is actually the worst thing to do because now you have to reset the security system and engine immobilizer.
Make sure your battery clamps and posts are cleaned with a wire brush, wipe with Vaseline or Dielectric Grease and then make sure the clamps are tight. Then put the battery on to charge. This says you have low voltage.
DTC P0480 registers when the PCM doesn't receive the proper amount of voltage from the cooling fan control circuit that should indicate that the fan works properly. This code can be caused by a faulty cooling fan relay, a bad cooling fan, damaged wiring, or a bad coolant temperature sensor. Jan 19, 2024
JustAnswerhttps://www.justanswer.com > Chevrolet Repair
May 6, 2010 - P0480 is for the low speed cooling fan relay control circuit. · A short to ground · DTC P0480 Cooling Fan Relay 1 Control Circuit · The ignition is ...
1 answer · Top answer: DTC P0480 or P0481 Circuit Description • P0480 is for the low speed cooling fan relay ...
JustAnswerhttps://www.justanswer.com > Chevrolet Repair
Dec 2, 2011 - 2006 chevy: v..it Everything is fine but check engine code p0480 comes... · FC relay connector is damaged (check pins for damage, and for moisture) ...
1 answer · Top answer: Here is a picture of relay you need to replace so start with that..If code comes back on ...
YourMechanichttps://www.yourmechanic.com > Articles
P0480 is a general OBD2 trouble code that refers to the a malfunction within the cooling fan control circuit. This code is similar to P0481 and P0482 codes.
Hi there: DTC P0481 - Cooling Fan 2 Ctrl CKT Malfunction The P0481 requires reprogramming the PCM at a Mazda dealership, see below TSB in THIS LINK:
DESCRIPTION Some vehicles may exhibit DTC P0481 (Cooling fan relays malfunction) stored in the PCM.
The false DTC detection occurs when the A/C refrigerant pressure switch is ON but the cooling fan relay is turned OFF by the PCM because the coolant temperature is 108C degrees and under. The PCM stores DTC P0481 because the cooling fan is operating without PCM control command. This is due to improper PCM calibration.
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code p 0481 refers to coolant temp fans --circuit malfunction===causes-- wiring--- , fan--ECM
fix the fan not working --fuses wiring fan motor
codes p 0132 and 137 and p 0141 refer to the heated oxygen sensors in the exhaust manifolds , both banks before the cat converters
replace those sensors and it will fix those codes
P0449 - Evaporative Emission (EVAP) Vent Solenoid Control Circuit
P0481 - Cooling Fan Relay 2 Control Circuit
It is not uncommon for the canister vent solenoid to go out.More then likely this is the correction for this issue.The second problem could be addressed by verifying that the second fan is not coming on and whether or not the fan is receiving any power.Turning the a/c on normally forces the second fan to come on.If it does not a wiring diagram may be necessary to check different points for power.Would start at the relay itself to verify power is going to and through the relay. You can also swap an identical relay with the fan relay just to test if the relay itself is malfunctioning.If it works after that then you need a replacement relay for that circuit.If it still does not work you will need to find out where the power stops flowing in that circuit.
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