

Drivable short-term, but fix now to avoid damage.
This code means the engine computer detected high voltage or an open condition in the circuit that controls the fuel injector for cylinder 10. It usually points to an open circuit, a broken wire, a poor connector, or a failed injector. It's a fairly common electrical fault and is often fixable by repairing the wiring or replacing a single injector without major engine work.
$150 – $500
Varies by vehicle and root cause.
For short distances, usually yes, but it's not wise long term. A non-firing cylinder can damage the catalytic converter and lead to a bigger repair, so have it looked at soon.
Expect roughly $150 to $500. A wiring or connector repair is on the low end, while replacing the cylinder 10 injector plus diagnosis costs more.
Yes, it's fairly serious because it can stop a cylinder from firing. The car may still run, but you risk converter damage and rough performance if you leave it.
P0290 means the circuit voltage is too high or open, while P0289 means it's too low or shorted. Both involve cylinder 10's injector, but the parts and wiring a technician inspects differ.