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P0481 cooling fan relay 2 control circuit what part would I need for this.

Posted by Anonymous on

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Posted on Jan 02, 2017

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SOURCE: P0481; Cooling Fan 2 control circuit

should be the one on drivers side will have a light blue and black wire \s going too it

Posted on Apr 01, 2009

  • 79 Answers

SOURCE: Is there a part number for the fan 2 circuit

no
that code says that the cooling fan 2 circuit has a failure, when it tried to turn it on the computer did not see a voltage change thus your code. Check the cooling fan 2 relay.

Posted on Aug 15, 2009

  • 1403 Answers

SOURCE: I got a P0481 code where

the fan relays are located under the hood in the main fuse panel.look for a black box on the drivers or passengers side fender well. under the cover of the main fuse panel you will see locations of all relays,including the fan relays. thank you,for choosing fixya.com

Posted on Mar 27, 2011

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2005 montana sv6 sitting in traffic temp gauge goes up codes P0128 and P0481 present


DTC P0128 Engine Coolant Temperature (ECT) Below Thermostat Regulations Temperature
An engine coolant temperature (ECT) sensor monitors the temperature of the coolant. This input is used by the powertrain control module (PCM) for engine control and as an enabling criteria for some diagnostics.
The air flow coming into the engine is accumulated and used to determine if the vehicle has been driven within the conditions that would allow the engine coolant to heat up normally to the thermostat regulating temperature. If the coolant temperature does not increase normally or does not reach the regulating temperature of the thermostat, the diagnostics that use ECT as enabling criteria may not run when expected.
If the PCM detects the calibrated amount of air flow and engine run time have been met, and the ECT has not met the minimum thermostat regulating temperature, DTC P0128 sets.

P0481
Cooling Fan Relay 2 Control Circuit
PCM
DTC P0480 or P0481

Have you changed the thermostat ?
Do you know how to test cooling fan relay (S)
Battery positive voltage is supplied to the cooling fan 1 relay from the COOL FAN #1 fuse. The powertrain control module (PCM) controls the cooling fan 1 relay by grounding the low speed cooling fan relay control circuit via an internal solid state device called a driver.
Battery positive voltage is supplied to the cooling fan 2 relay and the cooling fan 3 relay from the COOL FAN #2 fuse. The PCM controls the relays by grounding the high speed cooling fan relay control circuit.
When the PCM is commanding a relay on, the voltage potential of the control circuit should be low, near 0 volts. When the PCM is commanding the control circuit to a relay, the voltage potential of the circuit should be high, near battery voltage. If the fault detection circuit senses a voltage other than what is expected, the DTC will set.
The PCM will monitor the control circuit for the following conditions:
• A short to ground
• A short to voltage
• An open circuit
• An open relay coil
• An internally shorted or excessively low resistance relay coil
When the PCM detects any of the above conditions, the DTC will set and the affected driver will be disabled.

Jul 01, 2017 | Cars & Trucks

1 Answer

Service engine Soon light on. Code P0481 on Scanner. Both fans will come on without A/C compressor on so fans are working.


It sounds like you have a control problem , The ECM or PCM energize the relay by supplying a ground or power depending on the manufacturer ! What make , year model vehicle ! P0481 Cooling Fan 2 Control Circuit Malfunction

Mar 16, 2015 | Cars & Trucks

2 Answers

WHAT CAUSES A P0481 FAN#2


most likely a bad fan motor or an open circuit.

Aug 08, 2014 | 2000 Cadillac DeVille

1 Answer

Fault 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.

Jun 05, 2010 | 2000 Chevrolet Impala

2 Answers

Code problem p0481 buick regal 3.8L V6


That fault indicates a problem in the electronic cooling fan circuit. More specificly the output driver in the onboard computer has detected a problem with the control circuit of the electronic fans. First inspect for correct operation of both radiator mounted fans.

Mar 12, 2010 | 2002 Buick Regal

1 Answer

Is there a part number for the fan 2 circuit


no
that code says that the cooling fan 2 circuit has a failure, when it tried to turn it on the computer did not see a voltage change thus your code. Check the cooling fan 2 relay.

Aug 15, 2009 | 2003 Chevrolet Impala

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