Power steering can help you turn the wheel more easily especially in parking situations or when going slowly. If your car uses hydraulic power steering, there’s a fluid in place to transfer fluid to the steering part. If the amount of fluid in this system goes really low, your steering may feel tighter to turn. Keeping on going with a low amount of fluid can even ruin parts of the power steering.
Learning how to check power steering fluid is a simple maintenance task on vehicles that use a hydraulic system. The reservoir is usually located under the hood and may have markings showing the acceptable fluid range. Still, checking the level is only part of the process. The fluid’s condition, unusual noises, steering behavior, and signs of leakage can provide useful clues about the system’s health.
The first and crucial bit of information: Not all modern vehicles utilize a fluid system to assist the power steering, so understanding electric power steering systems can help you determine whether your vehicle requires fluid checks at all. Many newer model cars have electric power steering, and in this situation no conventional power steering fluid reservoir can be found. Make absolutely certain your vehicle actually has a fluid system powered assist before starting and refer to the owner’s manual for the type of fluid that your vehicle has.
What Is Power Steering Fluid?
Power steering fluid is a fluid that’s part of many hydraulic systems in vehicles. The fluid helps the power steering pump to generate pressure and provides assistance in steering the vehicle. The fluid is also a lubricant that is necessary for proper working of various components.
If you have your fluid level correct, then you should feel that much more help when you turn the steering wheel than if you didn’t have the power steering fluid.
Many types of fluids aren’t compatible with one another, so always check your vehicle manufacturer’s recommendations for the correct power steering fluid before adding anything to the reservoir. For this reason the user’s manual for your vehicle is the best source for identifying the fluid your vehicle requires.
Does Every Car Have Power Steering Fluid?
No. Many cars utilize Electric Power steering (EPS) which replaces hydraulic power steering. These systems utilize an electric motor and circuitry to boost the steering input instead of fluid so they do not include a hydraulic fluid reserve tank which needs to be serviced on a regular basis.
If you open your hood and do not locate a reservoir, the lack of one does not mean you are missing something – your vehicle may indeed be electrically assisted.
Always refer to your car’s owner’s manual or vehicle specifications before adding any fluid.
Where Is the Power Steering Fluid Reservoir?
If your vehicle is equipped with hydraulic power steering, you can almost always find the reservoir in the engine compartment. Where, however, is not standard for make and model. Locate a small plastic or metal container with a cap that looks like that associated with the power steering fluid bottle, or has writing such as “Power Steering Fluid” or a picture of a steering wheel.
A cap with an integrated fluid-dip stick may be located on some fluid reservoirs, though others simply show the fluid level on a transparent casing or have an internal dipstick.
Don’t confuse it with the Brake Fluid Reservoir, Coolant Expansion Tank, Window Washer Reservoir, or the Engine Oil Filler. When in doubt, don’t guess-check with your owner’s manual and make sure you are refilling the proper reservoir. Putting the incorrect fluid into one of the other reservoirs will lead to a much bigger issue than low power steering fluid!
How to Check Power Steering Fluid
Checking the fluid is generally straightforward, but the correct procedure can vary depending on the vehicle.
1. Park on a Level Surface
Park the car on relatively level ground and make sure that the handbrake, and any other brake devices used for parking, are correctly applied. A level surface will allow you to take a reasonably accurate measurement, as there could be a build-up of fluid on one side of a reservoir tank when the vehicle is on a tilt.
2. Let the Vehicle Reach the Recommended Condition
Some cars mention when to check fluid with cold engine; some with both hot and cold markings. Check your owner’s manual and reservoir markings, prior to checking a fluid level, and don’t take for granted that an engine on which you check fluids will be identical. If your mechanic instructs to check with the engine running, you will need to be careful that nothing your fingers touch – including anything you may be wearing – don’t come into contact with any belt, pulley, fan or other moving part of the engine.
3. Locate the Correct Reservoir
Locate the power steering fluid reservoir and examine the filler cap and surrounding areas.
Clean off any dirt or debris from around the top of the power steering fluid filler cap, before you attempt to remove it from the power steering reservoir. It will prevent contaminants from entering the power steering fluid when you remove the cap.
4. Read the Fluid Level
Other tanks may be marked with MIN/MAX or LOW/FULL along the sides. If the container is clear plastic, you might be able to tell the level through it. Some systems are equipped with a dipstick threaded into the lid of the reservoir.
Consult your vehicle manufacturer for guidance as to whether you should wipe the dipstick clean and replace it before reading your fluid level.
Be sure the level is between the appropriate lines on the dipstick and never add more fluid than is needed to reach the top line.
5. Inspect the Fluid
The fluid level will tell you a great deal, but don’t neglect to look at the fluid itself.
The fluid should generally be consistent with the manufacturer’s specifications for the condition of the fluid, varying from fluid type to fluid type, color from clear amber, pink, or red or another color.
It is very difficult to make a judgement based on color alone due to various types and colors of different fluids. What you should be looking for is visible contamination, foreign particles, a burning or otherwise abnormal smell.
6. Inspect Around the Reservoir
Examine your reservoir hoses, fittings, and other nearby parts for leaks and drips. You need to have the steering level checked if it’s dropped without cause because there aren’t usually losses of fluid unless there is a leak. If this seems to be recurring, a leak may be developing in your steering system.
What Does Low Power Steering Fluid Mean?
There can be many reasons for a low reservoir level, although a serious or frequently low reservoir can be caused by a leak or another system malfunction. Hydraulic power steering systems are typically completely enclosed, meaning the hydraulic fluid should not disappear with driving.
Possible leak locations include:
- Power steering hoses
- Hose connections
- Reservoir fittings
- Steering rack or gearbox components
- Power steering pump seals
- Other hydraulic connections
Slight leaks might result in only a few droplets or the ground getting moist. Greater leaks may produce a puddling effect on the ground beneath the car and you may experience power assistance problems.
If you are constantly topping up the fluid, you’re not really solving a problem in itself but rather masking it with more fluid.
Signs Your Power Steering System May Have a Problem
The fluid level is only one part of the diagnosis. Changes in how the steering feels can also provide important clues.
Whining or Groaning Sounds
If you are turning the steering wheel and notice a whining sound that appears when you turn it, one possible reason could be your power steering pump is low on power steering fluid, or has another problem. The noise itself, does not indicate where the problem lies, however; and an old pump, air in the system, or mechanical fault could potentially cause these symptoms as well.
Hard Steering
Excessive resistance in the steering wheel and controls could be a sign of a problem with the power assistance system if there is sudden high pressure in it. If the fluid level in the reservoir remains high but the steering continues to be heavy, do not assume the problem is merely the fluid level.
Fluid Leaks
Search for greasy or oily patches near the steering system parts, or even underneath the vehicle. If you spill anything or leak out of these fluid is Power Steering Oil that means there can be a chance as its appearance is similar to many others.
Foamy or Bubbly Fluid
When bubbles or foam collect in the reservoir it often suggests air is entering the hydraulic system. This can be caused by low fluid, or something is amiss in the hydraulic system. If your fluid continues to get foamy after topping up your system, you will want to make sure you find out what is causing it.
How Much Power Steering Fluid Should You Add?
Amount varies based on application and vehicle.
You’re generally not concerned about filling reservoir to the absolute top “just because it will hold more.” Rather you check against the level indicators provided by the manufacturer.
If fluid is below recommended level. Add correct fluid a small bit at a time. Recheck level instead of adding big gob at once.
Too much fluid can be just as detrimental to an system. Particularly in applications when fluid heats and expands.
Use fluid specified for your application. Just stating ‘power steering fluid’ will not always be the correct specification your vehicle requires. Match specification if one is given.
Common Mistakes to Avoid
Adding the Wrong Fluid
Here’s one of the most critical mistakes to learn to avoid. The appearance of a liquid may not indicate its actual chemical makeup or specifications. Consult the vehicle’s service manual and manufacturer service information before filling.
Overfilling the Reservoir
More fluid does not mean better steering. Fill only to the appropriate marking for the conditions specified by the manufacturer.
Ignoring Repeatedly Low Fluid
If you top up and the level goes down again, it means something needs to be checked out. You can keep the level up with topping up fluid but it covers the mechanical problem or the leak up too much.
Checking the Wrong Reservoir
You’ll notice a few fluid reservoirs positioned next to each other under the hood. Double check it’s the right thing before you start unscrewing or pouring.
Assuming All Steering Systems Use Fluid
Unlike conventional hydraulic power steering systems, electric power steering (EPS) has no requirement for typical power steering fluid. Don’t be frustrated by seeking a fluid reserve if your vehicle is fitted with an EPS system.
Turning the Wheel Aggressively While the System Is Low
If the steering system is making unusual noises or the fluid level is very low, avoid unnecessary steering input until the issue can be addressed safely.
Should You Flush Power Steering Fluid?
While some drivers change the fluids in there systems at every Oil and Filter Change (which is usually unnecessary for Power Steering) the Power Steering fluid does not have to be flushed at a standard interval on all vehicles. Certain manufactures will give some suggestion as to when to replace, others will not have any on a routine basis like they will for Engine Oil. Your best bet is the schedule in the vehicle owners manual.
Also, fluid flushing may be needed when there is any type of repair done, or some system has been lost and refills have been completed.
Just a matter of some fluid being darker is not a reason to flush in and of its self. Your professional mechanic can also tell you if the Power steering system needs to be bled out after repairs or fluid loss..
When to Get Professional Help
A basic fluid-level check is something many vehicle owners can perform, but steering problems deserve caution because steering is a critical safety system.
Have the vehicle inspected if you notice:
- Steering suddenly becoming difficult
- A persistent whining or groaning sound
- Repeated fluid loss
- A visible hydraulic leak
- Fluid spraying from a hose or connection
- Steering that feels inconsistent
- A damaged steering component
- Warning lights or electronic steering faults
- Problems that remain after correcting the fluid level
If, when you’re driving, the steering effort becomes very high, ignore the vehicle’s issues, gain effective control and get assistance. Get one more of the car parts (pump, hoses, gearbox or steering rack, seals etc) into the workshop for a test. A technician can identify where the issue originates from by checking all of these elements.
How Often Does Power Steering Fluid Need to Be Checked?
Each vehicle may have its own recommended schedule for checking the fluid.
Inspecting the fluid on your periodic underneath the hood check will allow you to notice changes as they develop and before you will encounter the problem. A possible time to check it would also be if your steering starts to develop unusual sounds or feels different. Vehicles that have developed leak problems before will need more attention. The owners manual is your first stop as system designs vary from vehicle to vehicle, what is optimal for one vehicle will not be the same for all.
A Simple Maintenance Routine
A good steering-fluid routine does not need to be complicated, especially when you follow practical car maintenance tips for checking fluids and monitoring important components.
First, you will want to determine if you have a hydraulic or an electric power steering system in your vehicle. If you have the hydraulic system, you’ll need to locate the proper reservoir and understand the recommended fluid specification by your manufacturer.
When performing standard maintenance, periodically check the power steering fluid level and the condition of parts adjacent to the power steering components. Be aware of any leaks, damaged hoses or hoses, poor connections, or altered fluid appearance.
Once a low level is detected you must then try to determine why the level is low. Simply adding additional fluid will not necessarily rectify a low level condition. While a single instance of correction may be sufficient in that fluid level was not checked under normal conditions, continuous loss is symptomatic of another problem.
You should be in tune to the feel of the steering. Alterations in steering effort and erratic assist could indicate any number of various troubles.
Frequently Asked Questions
How do I check power steering fluid correctly?
Park on a level surface – Find the right reservoir – Consult the manufacturers’ recommendations on checking oil temperature if warm or cold – Check markings on the reservoir or on thedipstick and compare against the required range. If required to top up – only use the correct fluid.
Can I check power steering fluid when the engine is hot?
Depends on the car. If there’s only a low/max indicator on each side and there are no hot/cold specific indicators it is a high / low. If there are hot and cold specific indicators follow those if the manual lists both on one side of the tank as high at both temps; don’t trust cold across the board not to be higher then hot either way. If there are no indicators but separate hot/cold marking and a reference to it do THAT.
What happens if power steering fluid is too low?
Low fluid may be the cause for decreased assistance for hydraulic steering. You may hear a whistling, whining or growling sound in your vehicle if the level of hydraulic fluid is too low. If you see the fluid level get really low, and continue to drive the power steering may go bad.
What color should power steering fluid be?
There is not one uniform color. That really varies by the fluid formula and the manufacturer. See your owner’s manual for what fluid you need, and look for clear indications of contaminant, foreign materials or anything weird – not the color.
Should You Drive If Your Power Steering Fluid Is Low?
Driving with a slightly low level may not immediately cause complete steering failure, but it should not be ignored. If the fluid is very low, the steering is difficult, or the system is making unusual noises, have the problem addressed promptly.
How to Identify an Electric Power Steering System in Your Car
You can check your vehicle’s specifications or owner’s manual to find out whether or not you have a steering system with electric steering. Usually, there won’t be any hydraulic steering system reserviors if the vehicle uses a steering system with electric steering, as it wouldn’t need a fluid reservior. You might see information about electric steering systems being referred to in vehicle documentation or on the dash panel in a given model of automobile.
Why does my power steering fluid keep getting low?
Repeated fluid loss commonly suggests a leak or another problem in the hydraulic system. Inspecting the reservoir alone may not reveal the source. If the level repeatedly drops, have the steering system professionally inspected.
Can I use any power steering fluid in my car?
No. Different vehicles can require different fluids or specifications. Always use the type recommended by the vehicle manufacturer. If the manual specifies a particular fluid or specification, match it exactly.
Does changing power steering fluid improve steering?
Replacing the fluid will indeed do so if you have contaminants on the fluid now, or you’ve got a Manufacturer mandated fluid replacement on it, but you won’t fix a pump worn out by fluid contamination with just that job nor will it address leaking hoses, failed steering gear, and so on. Everything has to be good to the system for good steering.
Final Takeaway
Knowing how to check power steering fluid can help you catch low fluid levels and potential steering-system problems before they become more disruptive. The process is usually simple on vehicles with hydraulic steering: identify the correct reservoir, follow the specified checking conditions, read the level, and inspect for leaks or unusual fluid conditions.
The one thing you have to do if you get a low level indication is not assume anything has to magically disappear after a fluid refill . However , you would really want the system repaired if levels drop again , or you can’t fill levels anymore ( system gets overfilled ) , or the system makes funny noises and steering becomes firm.
Another thing to keep in mind is that many modern vehicles employ electric-powered steering, so there is no hydraulic fluid in the first place. Your owner’s manual would serve as the most reliable source when it comes to figuring out which system is in your vehicle, fluid spec and when maintenance is needed.
