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2 Posts
Discussion Starter #1
I have a check engine light on.
Code reads: PO483

Symptoms:
I smell a maple syrup type of smell after driving it for awhile. Loss of 1-2 mpg.
No change in Temp gauge at all. I have changed the coolant cap. It looses coolant. No change at ALL in the driving, running, sound, or anything. Drives incredibly strong. Just the light, and the loss of coolant and smell.

I don't notice any leaks underneath the car.

Anyone have this problem before, or know what the problem might be?

2003 forester xs 80k miles
 

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2003 2.5x
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645 Posts
Loss of coolant how? You can actually see a loss in the overflow tank (as in its boiling over), or it is just disappearing?

Unfortunately, those are common symptoms of the dreaded head gasket issue:icon_frown:

It could be something as simple as the water pump or thermostat though

Use search for head gaskets and you will find lots of info about this.

Keep us posted as you use the process of elimination

Here is something that came up in a simple search
http://www.subaruforester.org/vbulletin/f88/sweet-candy-smell-low-coolant-used-forester-52082/
 

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03X MT
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846 Posts
if you search for your code you'll see it is a cooling fan item.

Not sure of the relationship to this code and all your other concerns.
 

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Discussion Starter #4
It's just either always empty, or getting there. We changed the cap on the coolant. I don't see it leaking anywhere. I'm not really all that mechanically inclined. We bought it used from someone who was VERYYYYY meticulous about servicing. So I have a hard time believing it is a head gasket.

But maybe it is. What are other symptoms of this?


Would a sensor, or a fan malfunction shoot off the check engine light?
Could it effect the mpg?

I've had a gasket and water pump go before, but there really is no sign of anything like that on this one.


Thanks fellas. appreciate your input and will update as this continues on.
 

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Premium Member
2008 Forester X Premium 5MT
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8,070 Posts
Welcome to the forum:Banane35: Sorry a possible HG issue is what maybe bringing you here:icon_frown:

Check for the following:
-a coolant leak by the water pump, where the lower radiator hose goes to the engine.
-Cracked upper radiator tank
-Coolant along the engine block by the heads.

As for believing it is a HG, the reason the above members mentioned it, is the Naturally Aspirated(NA) 2.5L has a history of HG issues. Believe it, the numbers back it up.

Here are just a few threads:
http://www.subaruforester.org/vbulletin/f113/ongoing-polls-regarding-head-gasket-problems-27944/

http://www.subaruforester.org/vbulletin/f88/2006-head-gaskets-problem-64464/

http://www.subaruforester.org/vbulletin/f88/another-stinkin-head-gasket-thread-65495/

http://www.subaruforester.org/vbulletin/f66/losing-oil-head-gasket-failure-70091/

http://www.subaruforester.org/vbull...5-head-gaskets-without-removing-engine-57335/
 

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2014 Impreza Ltd CVT
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3,319 Posts
You already have a boatload of suggestions for the low coolant, but the Ck Eng and P0483 says, The ECU turned on the fan relays, BUT the engine temp did not go down a set amount in 3 minutes. Subaru calls it Fan Rational Check.

Be certain both fans are coming on
( If you had the timing belt done, they may have forgot to plug in one or both fans )
There are no obstructions in front of the radiator
Any other cooling obstructions, like a partially blocked radiator.

It can all be due to the same problem as your coolant loss also when you find that.
 
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