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.

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.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1,000 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
  1. Home
  2. Questions
  3. Front doors not locking with fob.

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: How many air bags are installed in my vehicle?

air bags, while not defined as “lifesaving” equipment by the US government, do provide an important layer of protection for you and your passengers. They work with your seat belts to reduce the chance of being injured in certain types...

Q: Fluttering and bogging out when accelerating

Hello. Fluttering and bogging can be caused by a wide variety of issues. A few common causes are issues with the fuel, ignition, or engine management systems. If there is an issue with any of the components, such as the...

Q: The engine misfires at 2000 RPM if I accelerate too fast

Seems like the camshaft is making the ignition retard too much. Your system should read at -11 to -12 for retard timing. It is possible that your vehicle is probably reading around -13 to -14, which will cause the engine...

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...
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.