Q: Code P1491.

asked by on January 13, 2016

My jeep is showing a code P1491.

The most common cause of this code on this vehicle is the cooling fan relay in the under the hood fuse panel. I would have a technician such as one with YourMechanic come out and test the relay and diagnose the problem further.

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

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing


Experienced Mechanic?

Earn up to $70/hr

What others are asking

Car lost power and a cylinder.
The check engine light came on as a warning your vehicle is in need of service. The most likely cause is the engine is misfiring from an ignition coil failure or the plug wires got oil on them. I recommend...
How do I turn off an activated security alarm?
If the security alarm accidentally turns on, you can easily turn it off. Simply unlock the door with the key, key fob, or Intelligent Key, or press the request switch. This will only work if the ignition is turned off....
Key locked in ignition
Hi, over time the tumblers in the lock cylinder can wear out or get debris lodged preventing rotation. The notches on the key also wear out over time which doesn't fully unlock all of the tumblers preventing the key from...
low gas mileage
Decreases in fuel economy are caused by things like fuel control issues (fuel injector leaks (https://www.yourmechanic.com/services/fuel-injector-replacement), bad O2 (https://www.yourmechanic.com/services/oxygen-sensor-replacement) or other sensors), transmission problems (won't shift into high gear, slipping, torque convertor clutch fails to lock-up), misfires (ignition related), low...
My car is vibrating - 2005 Jeep Liberty
Hello. If your vehicle is making noises I would start by trying to identify where the noise and vibration are coming from. Noise and vibration, even at low speeds, can be caused by many things not all of them transmission...
How do I know if my water pump has went out?
Hello, a coolant pump can fail three different ways: leaking, noise, or low to no flow of coolant. Leaking (https://www.yourmechanic.com/services/coolant-is-leaking-inspection) would be associated with a loss of coolant and needing to add coolant (https://www.yourmechanic.com/services/top-off-coolant) back into the system. This could...
Does my 2009 Kia Optima require a hydraulic press for wheel bearing replacement?
Hello, to replaced your hub bearing will require a hydraulic press. If you'd like, a certified Your Mechanic Technician can come to your location to perform this. Please look at this web site for more information and service options....
2011 GMC Acadia will not start. Service stabilitrak light comes on an message saying battery in power saving mode. What can be the
The symptoms you are experiencing are similar to when a powertrain control module fails. I would recommend taking your vehicle to a nearby service facility that has the scan tools necessary to test for failed computer equipment within your automobile....
Extremely lean fuel trim
Hi there. After completing an error code download to verify if this is an electrical glitch first, the next step most professional mechanics would complete is the fuel pressure test. This tends to be the source of an across the...

Related articles

A Buyer’s Guide to the 2012 Jeep Compass
The The 2012 Jeep Compass has had lots of improvements in the 2011 model, which include available four-wheel drive (4WD) and front-wheel drive models (FWD). Since those upgrades, the Compass provides good connectivity to the road and comes with an...
The Best Used Cars to Buy for Senior Citizens
Everyone Everyone needs a way to get around. You need to get groceries, get to doctors’ appointments, visit with family and more. However, senior citizens have very different needs when it comes to buying a used car than other demographics....
How to Get Jeep Dealership Certified
Jeep car dealerships offer automotive technician jobs to mechanics who are Jeep certified through Chrysler’s official training program (MCAP)