Drivable short-term, but fix now to avoid damage.
This code means there's a problem with the serial communication link the engine computer uses to talk to other control modules. It's usually caused by damaged wiring or connectors on the data bus, but a failing module or poor ground can also trigger it. It's a serious code because it can disrupt multiple systems, though it's often traceable to a wiring or connection fault.
$150 – $1000
Varies by vehicle and root cause.
Only with caution. Short trips may be possible, but communication faults can trigger limp mode or affect safety systems, so it's best to get it diagnosed promptly.
Repairs range widely, roughly $150 to $1,000. Wiring and connector fixes are on the lower end, while replacing or reprogramming a control module costs significantly more.
Yes, it can be. Because it disrupts communication between modules, it may affect multiple systems and trigger limp mode, so it shouldn't be ignored.
It's the data network that lets your vehicle's control modules share information. When this link fails, modules can't coordinate properly, leading to warning lights and erratic behavior.