Question about 2003 Chevrolet Impala

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Engine light is staying on constantly. I have had it read with a handheld at Advanced auto parts. Its says cooling fan issues but I can hear the fan kick in when temp goes up to 175-180. Until recently my temp gauge never went over 165-170 during the life of my car since I bought it new in 2003. Second problem: may be related because all of this started at the same time. My Battery is running down over a period of a few weeks. I had it checked and charged at Auto and they say it took a full charge. I reinstalled the Batt and had the alternator check by Advanced Auto parts. They say it is putting out full amps and voltage. But they detected a 6 amp drain on my Battery and suggested a short in a fan relay or maybe a short in the fan itself or harness. Is there a common problem with the 3400 Impala engine? Where should I start? Thanks.

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OK, a 6 Amp drain is way too high. Normal drains are like .2 Amps and no higher.
The relay system may be bad, or the fan circuit may be shorted out somehow in the harness.

If the Service Engine Soon light goes on and it is constantly on, then it is a hard code.

I just had a problem with a 1997 Cadillac Deville where I had to have the fan motors (2 speed), the relays (3 of them), and the harness connections changed due to an intermittent no fan on condition.

I don't think that the temp going up to 175-180 deg. F is that bad, but the short is.

So, I would have the necessary repairs made to avoid draining the battery.

Good luck on this repair.

Posted on Oct 12, 2010

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