Q: If your trying to program a key and your battery is fully charged what else could be wrong

asked by on

I lost my key so I got a new one but it won't program and the battery light came on so I charged the battery and stuck it back in and tried again but the battery light came on again what else could be wrong
My car has an automatic transmission.

Hi there. There are a few things that could be at fault causing your dilemma. I understand you’ve charged the battery, but what are the current cold cranking amps and state of health? A digital diagnostic battery tester can provide the answer to these questions. The battery is the heart of the electrical system and a fault in the battery will cause or add to your problems. Are you only programming a key or a key and wireless transmitter? I located reference guide to aid you in attempting to program a new key, but this will not work if the vehicle has electrical complications.

It is as follows: Keep the windows open as a safety measure, then, Remove the ignition key from the ignition lock cylinder. Remove the BCM PRGRM fuse from the fuse panel. Refer to Fuse Block in Wiring Systems. Close all of the doors. Close the lift gate. Turn the ignition lock cylinder to ACC. Turn the ignition lock cylinder to OFF, and then back to ACC within 1 second. Open and close any vehicle door. A chime will be heard when the system enters the BCM programming/diagnostic mode. Important After 7 seconds, a chime may be heard confirming successful synchronization. It is necessary to wait approximately 14 seconds for a second chime that will confirm successful programming.

Press and hold the transmitter LOCK and UNLOCK buttons simultaneously for 14 seconds. Repeat the previous step on each additional transmitter to be programmed. Remove the ignition key from the ignition lock cylinder. Install the BCM PRGRM fuse back into the fuse panel. Refer to Fuse Block in Wiring Systems.

Your Mechanic has several available technicians that can assist you with an electrical system inspection, battery replacement, and provide an estimate and direction of repair.

Was this answer helpful?
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. If your trying to program a key and your battery is fully charged what else could be wrong

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: Can you cover up that a car that has a cylinder 3 misfire?

Hello and thank you for your question. You cannot cover up a misfire. Check the spark plug wires and check the spark plugs. Also, check the fuel injector to the cylinder that is misfiring and see if the injector is...

Q: Anti-theft - 2006 Chevrolet Colorado

Yes, the anti-theft could disable the engine given the right circumstances, however, I would recommend checking some other basic functions first such as fuel pressure since you are getting fuel from the pump but not to the rail. This is...

Q: New alternator works fine. Test is fine but battery light in dash is still on. How come?

Hello there, the battery light on your 2004 Toyota Tundra is there to warn you that the alternator output is out of specifications. If the alternator output is to low or high, the light will be on. The alternator output...

Related articles

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...
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.