Q: Front doors not locking with fob.

asked by on

I have two things wrong with my car. First off, when I press the fob I can hear the rear doors locks, but not the front doors. From the front door arm controls, the back door locks work but not the front doors. I have to manually lock the passenger's side door and use the key to lock the driver's side front door. Second, I have two warning lights on the dashboard: Check Tire Pressure and the Air Bag light.

A: The front door lock actuators are controlle...

The front door lock actuators are controlled by the their respective door switch units. The rear lock actuators are controlled by the Body Control Module. When the key fob is pressed to lock or unlock. The Body Control Module receives the request and then locks/unlocks rear doors and sends a signal to both the drivers door and passenger front door switch assemblies over a computer data line to lock/unlock front doors. Since the rear door locks are operating, one of two things is happening, either the door lock/unlock request is being interrupted on the computer data line or the Body Control Module is not sending the request to lock/unlock doors to the data line. One way to see if the problem lies with the data line or the Body Control Module is to try to lock or unlock all doors from the driver's door switch. If the rear doors do not lock/unlock then the data line to the Body Control Module is open and will need to be traced to locate the open circuit and repaired. You may want to enlist the help of a mechanic, like one from YourMechanic who can scope out the data line to see if the signal is being interrupted and to locate and repair the open circuit.

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・Save up to 30%

Get a quote

What others are asking

Q: What is the SOS Post-Crash Alert System™?

Your car’s safety systems are pretty highly evolved. That includes the SOS Post-Crash Alert System™. This is designed to activate during an impact that’s severe enough to deploy any air bag inside the car (driver front, passenger front, side air...

Q: The A/C works only when the fuse has been replaced in order for it to continue to work. What causes this?

It is important to know which fuse you are replacing. Is it the fuse to the compressor clutch or to the blower motor to be precise. Either way, I can give you some insight that you can use to figure...

Q: My high beams dont work what could be the problem?

Hello and thank you for your question. The high beam switch sometimes tends to get stuck on low beams only. Check the high beam relay and see if it is clicking when the high beam switch is activated. If the...

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...
How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
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...