Drivable short-term, but fix now to avoid damage.
This code means the engine's main computer found an error in its stored programming or settings, often related to its keep-alive memory or a failed software update. It can show up after a battery disconnect, a module reflash that didn't complete, or a failing computer. Fixes range from simply reprogramming (reflashing) the module to replacing the PCM if the memory chip itself is bad.
$100 – $1200
Varies by vehicle and root cause.
You can usually move the car short distances, but it's not safe to rely on it. Because this code involves the engine computer, you may get stalling, no-start issues, or disabled safety systems. Get it checked as soon as you can.
If it's just a reprogramming (reflash), expect around $100 to $250 at a shop with the right equipment. If the computer itself must be replaced and programmed, the total can reach $800 to $1,200 or more depending on the vehicle.
Yes, it should be treated as serious. It points to the engine's main computer, which controls how the engine and many safety features work. Don't ignore it, even if the car seems to run okay.
Yes. Low voltage during a module update or after a battery disconnect can corrupt the computer's stored settings and trigger this code. Always make sure the battery is healthy before reprogramming.