The Check Engine Light may illuminate because of low catalytic converter efficiency. This same issue may cause the car to fail the State Smog Test if one is required.
Resources for the Repair and Maintenance of your 2004 Subaru Forester
2004 Subaru Forester
2004 Subaru Forester Problems
Sometimes the Check Engine Light illuminates because the computer detects misfires. Subaru released an improved spark plug wire set to solve the problem. The ignition coil should also be inspected for carbon tracks or short circuits between the contacts
The Check Engine Light may illuminate because of a failed knock sensor. Although the sensor often tests okay, it can fail intermittently, while the vehicle is being driven.
An oil leak can develop from the spark plug tube seals. Excess oil in the spark plug tubes can result in engine misfires and illumination of the Check Engine Light. Our technicians tell us that removing the valve cover and replacing the tube seals and cover gasket is necessary to correct this concern. Oil damaged spark plugs, ignition wires, and ignition coils will also require replacement.
The front oxygen (air fuel ratio) sensor element may develop a crack, causing the Check Engine Light to illuminate. Subaru has recalled certain models to replace sensors that may fail. The Subaru service program number is WXW-80, this is not a government mandated recall.
2004 Subaru Forester Recalls (Recent)
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On 26 vehicles, the engine oil control valve cover may not have been tightened properly, which could allow oil to leak. If leaking oil contacts hot engine components, a fire could result in the engine compartment. Dealers will inspect and retighten the oil-flow control valve cover bolts. The recall began October 8, 2004. The Subaru recall number is WWU-05.
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The front lower control arms may break at the hanger brackets due to corrosion. This corrosion is commonly a result of the hanger bracket being exposed to salty conditions, such as roads where salt is used as a snow melting agent. A broken control arm can result in loss of vehicle control, increasing the risk of a crash. Dealers will inspect the affected control arms and rustproof or replace them as necessary. The Subaru recall number is WVX-34.
2004 Subaru Forester Questions and Answers
I am familiar with the shaking associated when braking on a slick surface. I have had that same shaking effect on dry surfaces when the wheels are turned at an angle. Example: pulling into a park...
Autotransmission lever will not move to R and park
I just bought my Subaru 3 wks ago. It just started making a low rumbling sound and then you feel vibration all through the car. The steering wheel does not shake and it does not go away when redu...
Check engine light came on while driving. Stopped the car and checked the usual ... was the gas cap on tight. Took off, put back on ... making sure it was clicking ... started the car again. Lig...
when fueling gas station pump shuts off after 1 gallen.
2004 Subaru Forester Reviews
Love my 2004 Forester XT. It's at 115,000 miles on it with most of those miles on trips to Ski resorts in Vermont and New England. Love its reliability, handling, comfort, practicality, and BIG MIRRORS AND WINDOWS!! However, I did have to replace both my front window motors recently. Now, its a little noisy on the highway over 70 mph. The glass was not aligned well because the doors do not have a window frame. But thats a minor problem for a fabulous vehicle.
At 5 years old and 30k miles no problems yet. Gets door dings easily, and some bits in the interior have been easily damaged, but overall been extremely reliable.