Skip the auto shop - Our mechanics make house calls

Q: Doors not unlocking when I use key fob

asked by on

Three of the doors on my car do not unlock consistently when I hit the Lock button on the key fob.

Hi. I’m going to assume they open when using the door lock switch. First of all, pressing the fob once only unlocks the driver’s door. The fob must be pressed a second time within 5 seconds to unlock the rear doors. That is how the system is designed. So, you may just need to hit the button a second time. If this is being done properly but the doors still do not unlock, suspect a problem with door lock circuit. Looking at the wiring diagram for your vehicle, I see the passenger and rear doors use a relay that is separate from the driver’s door. My guess is that this relay is sticking, However, the problem could also be with the remote control door lock receiver (RCDLR) or body control module (BCM). When the RCDLR receives a signal from your key fob it requests that the BCM unlock the doors. A trained technician, such as one from YourMechanic, will be able to inspect the electrical components and repaired any failing parts.

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: Won't start just cranks

Without a good description of the noise, this may be difficult to diagnose through Q&A. If the engine is turning over faster than usual, there may be a problem that caused the engine to lose compression. If the engine cranks...

Q: Taillights and dash lights not coming on

A short is a possible cause. Was the fuse you replaced blown? Did the new one blow as well? Shorts can be tricky to track down, especially if they are intermittent. Check your taillight/turn bulbs, and your front marker/turn bulbs...

Q: difficulty factor replacing thermostat and censor for a 2012 Chrysler 200. do I need to drain the radiator

Hello there, thank you for asking about your 2012 Chrysler 200. As long as you reduce the coolant level below the area you will be working in, you don't have to completely drain the coolant. However, be sure not to...

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...
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...
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...