Disconnecting the battery of your car and wait about 5 minutes, then reconnect the battery, sometimes the TPMS light would go away, but sometimes it won’t work. Most cars made in 95 and after, you can reset the Check Engine Light by pulling the Brake or Taillight Fuse for 30mins and putting it back in, not needing to pull the battery cables. One way is by disconnecting the battery cable for 2 to 3 minutes and waiting to see if the check engine light comes back on upon reconnecting the battery and start the car. There are a few ways to reset your Engine control modules. Hello there, many faults will cause your 2008 BMW X5 to not start. Battery Size. What does programming the BMW battery do / What is the purpose of registering a BMW battery? I was able to get the cassette out, but the player seems to be stuck in cassette mo … If your BMW 3-Series battery has died, it is important to perform a charging system test to verify the battery is the culprit. Before replacing any parts you want to reset your ECM to ensure that part replacements are absolutely necessary. Disconnecting the battery to remove the settings isn't advised; it doesn’t correct the problem and the codes will reset once the vehicle completes the necessary trips and miles for the on-board computer to deliver its diagnostics. Sometimes it is connected directly to the negative battery post, but some cars attach it directly to the car body. Pulling the neg battery terminal for an hour can reset the computer and all the stored codes. I had tried that before. Since you’ve recently replaced the battery, a few possible causes would include the starter, battery cables, battery terminals, ignition switch, or a wiring harness fault. There's also a way to reset the ECU on BMW e46 with the key and gas peddle. It’s important to keep the settings in the computer so you can determine any vehicle problems. The negative battery cable is the one that has black insulation on the wiring. Yes, disconnect both the pos and neg cables and touch them together for 5 seconds. I've unplugged the battery twice & accidently closed the trunk twice on those 2 events. 88 BMW m6: the bright idea to disconnect the battery to try to reset I have an 88 BMW m6 and I inserted a cassette to see if it worked and it got stuck, the eject button would not work. This will clear/reset it. Disconnect the negative battery cable using a `1.8 cm (3/4 inch) spanner to loosen the battery cable. Something like turn the key on but not start, press the gas peddle for 5 seconds, turn key off, remove foot from peddle. Notes. How to reset the Computer code after disconnect / replace the battery 25 Answers. I had to use another car's battery to ground it to open the trunk. It sucks that BMW doesn't make a manual latch to open the trunk (like for the hood). If you are swapping out your BMW battery for a new one with different amperage and or voltage specs, the car needs to be told this so it can adjust for the new battery settings and not damage your car’s fragile electrical system. Anyways, to OP, no, you dont need to reprogram anything other than correcting your clock. Hi Guys, Battery ran flat in my BMW x 5 4.8is after I left the key on about 4-5 hrs, some interior lights were on and CD Player was on. is that usual? The smallest battery you can install on the 3-series would be an H6, L3, or Group 48 battery with minimum cold-cranking amps of 570 A. I was told that if you have a fault code that you want to reset you can do so by disconnecting the battery and touching the 2 cables together to clear any charge in the capacitors and wait a few hours then re-connect the battery. , disconnect both the pos and neg cables and touch them together for 5 seconds cables. 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