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Error code P0495

Old February 1st, 2006, 4:03 PM
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Default Error code P0495

I have a 2002 trailblazer LS. The check engine light is on. Checked the cooling fan relay sensors and changed them out. It's still making the high idle noise. Any ideas?
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Old February 16th, 2007, 10:34 PM
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Default RE: Error code P0495

it's prolly ur fan clutch they r bad about going out.
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Old February 16th, 2007, 11:44 PM
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Default RE: Error code P0495

ORIGINAL: tshunt01

I have a 2002 trailblazer LS. The check engine light is on. Checked the cooling fan relay sensors and changed them out. It's still making the high idle noise. Any ideas?
You'll have to describe what P0495 is ??
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Old February 19th, 2007, 12:26 AM
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Default RE: Error code P0495

DTC P0495
Circuit Description
The cooling fan relay sends a pulse width modulation (PWM) signal (12-14volts) to the cooling fan by the cooling fan clutch supply voltage circuit. The powertrain control module (PCM) uses the PWM signal, which controls the speed of the cooling fan by controlling the position of the oil control valve inside the clutch. If the cooling fan RPM is to high when the PCM is commanding 0%, DTC P0495 will set.

according to the flow chart if u already replaced the relay next to replace is ur fan clutch.
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