Q: Code P1491.

asked by on

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.

Was this answer helpful?
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

Get a quote

What others are asking

Q: AC bearing issue

The part(s) required will depend on exactly what has failed. If you see liquid, that liquid could be engine coolant in which case you might have a failed water pump. The water pump is driven by the serpentine belt. There...

Q: Trying to find the size of the nut that connects the yoke and the differential

Hi there. If you are going to attempt to replace the rear housing of your Jeep, I highly recommend purchasing a service and repair manual for your 1994 Jeep Wrangler. Not only will it give you some great tips on...

Q: Hello, my engine fan comes on at start up even when the car has been sitting over night.

Hi there. In most cases, this is an indication of an electrical glitch or short in the cooling fan motor or a malfunction of the radiator temperature sensor on top of the radiator. The radiator fan should only come on...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.