Skip the auto shop - Our mechanics make house calls

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?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
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: Transmission

You may be experiencing what's called "Limp Mode." Your Jeep trans staying in 2nd or 3rd and not shifting probably means that it is in limp mode. It is a computer strategy designed to protect the transmission from harm when...

Q: engine will not start now, after repairs first to the transmission, then alternator and new battery and last, a new fuel pump

If all the other problems started to happen after the transmission was removed and rebuilt, I would suspect that a wire harness has not been connected good or got pinned between the engine and transmission. I would also look for...

Q: Car vibrates at Idle when AC is turned on

Hi there. Typically when the AC compressor is cycling, it will draw more power from the engine, which might make an existing rough idling engine "feel" worse. This could be caused by fuel system components like mass air flow sensor,...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...