Drive with caution — fix soon.
This code indicates a general malfunction in the 'B' high-resolution timing reference signal, typically from a second crankshaft or camshaft position sensor. It usually points to a failing sensor, wiring or connector problems, or a damaged reluctor ring. It's a fairly common type of sensor fault and is often fixable by replacing the sensor or repairing the circuit, without major engine work.
$150 – $450
Varies by vehicle and root cause.
For short trips, usually yes, but you shouldn't rely on it. If the engine runs rough or is hard to start, get it checked soon to avoid a breakdown.
Most repairs run between $150 and $450, depending on whether it's a simple sensor replacement or a wiring repair.
It's moderately serious. It usually won't harm the engine, but it can cause poor running and starting trouble, so it's best addressed promptly.
Signal B is a second timing reference input the computer cross-checks against Signal A. A fault on the B circuit means that backup or secondary timing signal is unreliable.