Its the cooling fan speed sensor that needs to be replaced.
P1481 cooling fan speed sensor circuit.
This is th cooling fan circuit because it failed it may be to your advantage you could of over heated there is a tsb technical sevice bulletin where he circuit or the fan speed chaffs tsb bulletin 05 06 02 012b date october 9 2006 the bulletin is to replace the cooling fan.
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Common mistakes when diagnosing the p0526 code in some cases a reoccurring p0526 code is due to a mechanic replacing the cooling fan motors without performing a more thorough diagnosis.
The cooling fan speed sensor is built in inside the fan clutch.
Check that wiring has continuity the wire to sensor must have 5v.
The engine control module controls the fan speed by sending a pulse width modulated signal to the cooling fan speed control module the cooling fan control module varies the voltage drop across the engine cooling fan motor in relation to the pulse width modulated signal.
If the code returns they have successfully diagnosed a larger issue with the fan speed sensor circuit and should move on to other repairs.
The engine control module controls the fan speed by sending a pulse width modulated signal to the cooling fan speed control module the cooling fan control module varies the voltage drop across the engine cooling fan motor in relation to the pulse width modulated signal.
Here an interesting website on trailblazer fan system.
I got check engine light on and poped code p1481 fan speed circuit sensor does that mean that i have a bad fan clutch since mine is an electronic fan clutch.
P1481 cooling fan speed circuit.
P1481 meaning the engine cooling fan is a variable speed fan.
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It uses the cooling fan speed signal in order to reduce the cooling fan noise and in order to maintain.
The gm 4 2l ll8 engine cooling system receives its heat transference via a unique fan that drives air through the various radiators only when activated under certain conditions to eliminate the waste of energy it takes to constantly drive that fan against the resistance of air.
If you have a code p1481 or similar pointing at the cooling fan speed sensor often you have to fix or replace the wiring rather that the sensor.
