So if its leaking fluid does that mean i need to replace transmission

All of the transmission fluid can leak out. The cooling lines are there to cool the tranny fluid, and it is circulated through the radiator by means of a pump. If a line is leaking, the pump will just empty the fluid out through the leak. The lines are usually just held in place by clamps to keep them from chafing through against the body or chassis, so replacing them should be quite an easy job. Just undo the bolts that hold them to the box and the radiator, undo however many clamps hold them in place, and reverse the procedure with new pipes.

If you are always adding fluid, that means you have a leak somewhere. Put a piece of clean cardboard under suspect areas under car overnight to check for obvious leaks. The one hard leak to find is when the trans cooler in the radiator is leaking internally. Open your radiator cap (only when cool) and see if it looks oily inside. If so, you need to replace your radiator, and I suggest you flush your cooling system at the same time.

Your car has several different types of oils or fluids (motor oil, transmission oil, power steering fluid/oil, brake fluid, and differential oil - if applicable). . Before you can determine how to fix your problem, you need to determine exactly what you problem is, meaning you need to figure out what fluid is leaking.

Good Luck!

Where is it leaking from. It could be a damaged fluid line going to the transmission cooler or the cooler could be damaged. Could even be a damaged transmission sump.

Your scanner will give you the code but it will not tell you how to fix your vehicle. Scanners basically tell you what systems to check or what systems are failing.

These are what your codes mean:

P0700: Transmission Control Module
- Shorted or open circuit within transmission control module (TCM)
- Failure of transaxle control module. This is just a informative code.

P0734: Gear ratio error in 4th gear
- Low transmission fluid level
- Dirty transmission fluid
- Shift solenoids
- Transmission mechanical problems
- Transmission hydraulic control circuit

P0732: Gear ratio error in 2nd gear
- Low transmission fluid level
- Dirty transmission fluid
- Shift solenoids
- Transmission mechanical problems
- Transmission hydraulic control circuit

P0731: Gear ratio error in 1st gear
- Low transmission fluid level
- Dirty transmission fluid
- Shift solenoids
- Transmission mechanical problems
- Transmission hydraulic control circuit

P0871: Transmission Fluid Pressure Sensor Switch C

P0876: Transmission Fluid Pressure Sensor Switch D

Emissions Codes:

P0400: Exhaust Gas Recirculation Flow Malfunction
- Harness or connectors (EGR volume control valve circuit is open or shorted.)
- EGR volume control valve stuck closed
- EGR volume control solenoid valve
- Dead (Weak) battery
- EGR temperature sensor and circuit
- EGR Valve

How to fix :
- Clean EGR Valve
- Repair EGR harness or connector
- Replaced EGR volume control solenoid valve
- Replaced EGR volume control valve

P0440: EVAP Emission Control System Malfunction
- Missing Fuel cap
- Incorrect fuel filler cap used
- Fuel filler cap remains open or fails to close
- Foreign matter caught in fuel filler cap
- Incorrect fuel tank vacuum relief valve

How to fix:
- Retight or replaced fuel tank filler cap
- Replaced damage or leaking EVAP canister

P0456: EVAP Control System Leak Detected (Very Small Leak)
- Missing Fuel cap
- Incorrect fuel filler cap used
- Fuel filler cap remains open or fails to close
- Foreign matter caught in fuel filler cap
- Incorrect fuel tank vacuum relief valve

How to fix:
- Retight or replaced fuel tank filler cap
- Replaced damage or leaking EVAP canister

P0441: EVAP Emission Control System Incorrect Purge
- Missing Fuel cap
- Incorrect fuel filler cap used
- Fuel filler cap remains open or fails to close
- Foreign matter caught in fuel filler cap
- Incorrect fuel tank vacuum relief valve

How to fix:
- Retight or replaced fuel tank filler cap
- Replaced damage or leaking EVAP canister

Based on the info check your EVAP system. I would check for leaks and maybe replace the EGR and the canister.

For the transmission check the TCM also you may need to take it to a mechanic though.

Hope this helps a little.

- Tech 101 (ASE CERTIFIED MASTER TECHNICIAN)
- Larson's Mobile Auto Repair
- 209-845-7620
- Oakdale, CA

Transmission fluid is sometimes cooled by way of a seperate internal tank within your radiator, the fluid is passed through hoses and steel or aluminum tubes from the transmission to the radiator, as the fluid flows thru the internal tank within the radiator it transfers heat from the fluid into the coolant within the radiator which then exchanges the heat from the coolant thru the radiator fins and into the ambiant air around the radiator.
That being said, if the internal transmission fluid tank or the connections at or within the radiator develop some sort of leak, the two fluids(coolant and transmission fluid) will mix and will show up where it shouldn't be! You may have an internal leak within the radiator, which means the radiator needs to be replaced.
Good Luck!

there is a transmission fluid cooler built into the radiator of your truck, which means there are steel lines that run from the side of your transmission up to the radiator, on the passenger side of the truck. the lines are a common leak point due to corrosion. depending on where the leak is, the lines can sometimes be patched, but they sometimes need to be replaced (or fabricated). good luck!

I assume you have the 4 speed auto and that it is red auto transmission fluid which is leaking.

You obviously have a leak from the transmission itself, or from a transmission fluid hose, which must be identified and fixed urgently. The leaking fluid is no doubt coming into contact with the hot exhaust system (often by blow back) which will give you a burning fluid smell.

You must ensure you check the transmission fluid level immediately and top it up with the correct spec fluid. Otherwise the transmission will malfunction if very low on fluid and you will potentially damage it.

You need to need to get the vehicle to a Subaru dealer for service or to a competent/reputable auto transmission specialist to have the leak identified and fixed as soon as possible.

Sean

they have several probable leaks. if you are not seeing any leaks on the ground then it is probubly the vacuum modulator on the passenger side of the transmission. the rubber diaphram inside of the mod ruptures and engine vacuum sucks transmission fluid from the transmission and into the engine. it does not require transmission replacement to repair, however it does tend to swell the vacuum lines and cause leaks in that respect. if the fluid is leaking onto the ground you should have it checked out. either way the sooner the repair is made the more likely the problem will stay minor.