Q: Key fob and key don't work

asked by on February 08, 2016

The car's original alarm system has shut everything down. Now the key fob and key won't do anything.

Hello. If there is nothing happening when the key FOB is used and if the car will not start then the battery should be tested first. If you don’t replace a failing battery, it can keep everything except for the alarm system from working. If the battery is fine then the anti theft module is the problem and needs to be replaced.

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 $65/hr

What others are asking

Car makes a ticking sound when key is turned to auxiliary even when the motor isn't running

The HVAC blower motor, if on during these episodes, could account for a noise like that. However, if the blower and all accessories are off, the noise is likely due to some sort of a malfunction in an electro-mechanical device...

Passenger side seat belts getting stuck.

Hi, The seat belt system is designed to lock if pulled out too fast or if in a fast stop. Inside the mechanism for the belt there is a ratching mechanism that controls this locking and is not serviceable at...

Car stuck in neutral

Hi there. There have been issues where the axle shaft breaks and the vehicle will be unmovable in any gear. The axle would have to be inspected to see if it is broken. Also, the problem could be internally in...

What do I do now that I got car started the security light won't turn off?

Hello. On your particular vehicle the security light staying on as the vehicle is running is an indication that the security system has failed and is disabled. It is common for a security light to come on after battery dies...

I put a penny in place of a fuse, tried to start my car and now it wont start and makes a grinding sound when i try to start it

Hi there. Putting a penny in place of a fuse, not recommended, replace with the correct fuse. The fuse is there, to protect the circuit. If the fuse blows, there is a short to ground. The grinding sound, when you...

Independently decelerating until car stalls when driving greater than 40 mph. Plus there is high RPM's with acceleration and won't always start in the mornings.

Hi there. Check to see if the fuel pressure on the fuel rail and see if the fuel pressure is around 45 to 65 psi. Run the engine up to a higher rpm and see if the fuel pressure drops....

Do i need a need a new gas cap/do i need an allignment?

Hello! Your question related to the gas cap suggests that you may have the incorrect gas cap installed on your car (if the original problem was in fact the gas cap). Unlike most vehicles in earlier years, these are...

Spark plug covered in oil

A fouled spark plug is a common issue with modern vehicles. Thinner oils are used to reduce friction and increase fuel economy. These thin oils in combination with a vehicle with higher mileage will cause oil to seep past the...

How to take off power steering pump on 1996 Toyota Camry LE V6 3.0L 1MZ-FE Engine?

There are flat "extensions" that attach to wrenches which are used to get into tight spots. Once a socket is attached to the extension, the socket hardly protrudes at all. You probably need one of those. An additional issue is...

Related articles

How to Get Mitsubishi Dealership Certified
Mitsubishi dealerships offer automotive technician jobs to mechanics who are ASE certified or have completed the UTI Automotive Technology program.
How to Install a Car Alarm
Whether you just bought a used vehicle without an alarm or just decided to opt for the extra security, installing an alarm system into your car is never a bad idea. There are a number of practical benefits, and in...
5 Essential Things to Know About Car Alarms
Car Car alarms are an essential tool for keeping your vehicle safe from thieves. However, making sure you understand the options available can make a huge difference in how effective it is. Below, you’ll find five essential things to know...