Skip the auto shop - Our mechanics make house calls
  1. Home
  2. Articles
  3. P0495 OBD-II Trouble Code: Fan Speed High

P0495 OBD-II Trouble Code: Fan Speed High

Check Engine Light

Diagnostic Trouble Code (DTC): P0495

P0495 code definition

The P0495 code is stored when the PCM has detected a voltage reading that is too high from the electric cooling fan control circuit.

What the P0495 code means

In order ensure that the engine temperature remains at the right level, and that the air conditioner system works when turned on, the PCM gathers data from the cooling fan control system circuit. If this data is more than 10% higher than the voltage specified by the manufacturer for the current driving conditions, then the PCM will store the P0495 code.

What causes the P0495 code?

The most common causes behind the P0495 code include a bad cooling fan motor, and a faulty cooling fan relay; however, there are some less-common causes that should be considered, such as:

What are the symptoms of the P0495 code?

The Check Engine Light will be illuminated, and may be the only observable symptom. Some engines may overheat, and the air conditioner may not work as efficiently as it typically does.

How does a mechanic diagnose the P0495 code?

After verifying the code with an OBD-II scanner, the mechanic should begin with a visual inspection of all wiring and other electrical components, as well as vacuum lines and hoses. Any simple electrical issues, such as loose or shorted elements, should be repaired or replaced as necessary.

After this, or any repair, it is important to clear the code from the PCM and retest the system. If the code returns, then the mechanic should move on to manually testing the voltage of the primary cooling fan motor. The next step is to check the voltage readings of the engine cooling fan relay. If either of these parts are not meeting the manufacturer’s specifications, they must be replaced.

Common mistakes when diagnosing the P0495 code

The most common mistake when diagnosing and repairing this code is to replace a cooling fan motor without performing a thorough diagnostic procedure of the entire system. One part that is often recalled is the cooling fan relay and may therefore be the true issue. It is important to diagnose all possible problems before replacing any major parts.

How serious is the P0495 code?

If the P0495 code is stored in the PCM, it represents a serious issue that should be repaired immediately. Although no major symptoms are usually observed, the inability to measure and control the cooling system will eventually lead to larger and more expensive repairs. Vehicle owners should have this code addressed as soon as possible.

What repairs can fix the P0495 code?

There are a few ways that a technician can address a P0495 code detection. They include:

Need help with a P0495 code?

YourMechanic offers certified mobile mechanics who will come to your home or office to diagnose and repair your vehicle. Get a quote and book an appointment online or speak to a service advisor at 1-800-701-6230.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
Icon-warranty_badge-02

Skip the repair shop, our top-rated mechanics come to you.

At your home or office

Choose from 600+ repair, maintenance & diagnostic services. Our top-rated mechanics bring all parts & tools to your location.

Fair & transparent pricing

See labor & parts costs upfront, so you can book with confidence.

12-month, 12,000-mile warranty

Our services are backed by a 12-month, 12,000-mile warranty for your peace of mind.

Get A Quote

Need Help With Your Car?

Our certified mobile mechanics make house calls in over 2,000 U.S. cities. Fast, free online quotes for your car repair.

GET A QUOTE

More related articles

The Traveler’s Guide to Driving in Malaysia
CraigBurrows / Shutterstock.com Malaysia is a popular destination for many tourists today. The country has amazing sights and attractions that you will want to explore....
Veteran and Military Driver Laws and Benefits in Idaho
The state of Idaho offers a number of benefits and perks for those Americans who have either served in an Armed Forces branch in the...
P2159 OBD-II Trouble Code: Vehicle Speed Sensor B Range/Performance
Diagnostic Trouble Code (DTC): P2159 P2159 code definition Vehicle Speed Sensor B Range/Performance...


Related questions

Q: Unresolved leakage problems

Have the oil pressure tested to see if it is low, or the oil sensor is reading wrong. Also have the engine compression tested to see if the cylinder number 2 has a problem or not. The P0302 code...

Q: check emission system and burning smell 2010 Acura TSX

Hello - you have multiple, unrelated problems here. The Vehicle Stability Assist (VSA) system may only have a problem with a wheel speed sensor, a common problem with electronic stability and anti-skid brake systems. The emissions and "burning smell" problem...

Q: Engine coolant temperature problem

You may have a persistent overheating issue due to a clogged radiator, blown head gasket, worn out water pump, etc. This should be checked out by a professional mechanic immediately to avoid being stranded or causing further damage. A professional,...