Skip the auto shop - Our mechanics make house calls

Q: Iod Fuse / Check Engine Light

asked by on

The IOD fuse blew on my 2008 Jeep Grand Cherokee. I replaced the 2 IOD fuses and it started up fine. Now a couple days later my Jeep hesitates when it starts and the check engine light came on. What issues should I look for?

My car has 171000 miles.
My car has an automatic transmission.

A: Your first order of business is to extract ...

Your first order of business is to extract the problem codes which are driving the Check Engine light. Hesitation to start when cranking - if this is what you mean - could be a sign of a weak power supply to the fuel pump from burned fuel pump relay contacts or a clogged fuel filter. Hesitating after it starts could also be caused by fuel pressure/supply issues (low pressure to be specific). Most auto parts stores will check your codes for free on a "time-available" basis. Alternately, a certified YourMechanic technician can come to your location to perform a Check Engine Light is On Inspection on your vehicle and confirm any necessary repairs.

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

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

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: My mechanic is saying the timing chain is bad (causing oil leaks). Does a timing chain cause oil leaks? What are your thoughts?

Hi, thanks for writing in. Timing change themselves cannot cause an oil leak but the timing chain cover can cause an oil leak. In order to replace the timing cover gasket, you will have to remove the serpentine belt and...

Q: Jeep door will not open

If the door is not opening, then either the linkage has become disconnected or there is an issue with the door latch itself. The door panel will need to be removed so the linkage can be inspected. The latch may...

Q: Slow/no acceleration high RPMs

Hey there. When the transmission control module detects a problem (i.e. faulty sensors, low fluid, etc.) the Check Engine Light will come on, and it will go into a "limp" mode. This limp mode will cause the car to drive...

Related articles

Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.
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.