Drive with caution — fix soon.
This code means the engine computer detected abnormally high voltage in the wiring or control circuit for the fuel injector on cylinder 12. It usually points to an open circuit, damaged wiring, a poor connector, or a failing injector. Typical fixes include repairing the wiring or connector, or replacing the cylinder 12 injector.
$150 – $500
Varies by vehicle and root cause.
For short trips, usually yes, but don't rely on it. A poorly firing cylinder 12 can cause misfires and catalytic converter damage. Get it checked soon, and stop driving if the light flashes or the engine shakes hard.
Most repairs fall between $150 and $500. A wiring or connector repair is cheaper, while replacing the injector costs more, especially on large V12 engines where the work is more involved.
It's moderate. The engine usually still runs, but ignoring a weak cylinder can lead to misfires and expensive converter damage. It's worth fixing promptly.
Yes. Both involve cylinder 12's injector circuit, but P0296 is a high-voltage fault (often an open circuit) while P0295 is a low-voltage fault (often a short to ground). The repairs overlap but the wiring diagnosis differs.