Drive with caution — fix soon.
This code means the engine control module is seeing fewer high-resolution timing pulses than it expects from the 'A' reference sensor, usually a crankshaft or camshaft position sensor. It typically points to a failing sensor, damaged wiring, or a problem with the reluctor ring (the toothed wheel the sensor reads). It's usually fixable by replacing the sensor or repairing wiring, without major engine work.
$150 – $450
Varies by vehicle and root cause.
For short trips, usually yes, but you shouldn't rely on it long-term. If the engine stumbles, hesitates, or is hard to start, get it checked promptly since it could leave you stranded.
Most repairs run between $150 and $450. A simple sensor replacement is on the lower end, while wiring repairs or reluctor ring issues can push the cost higher.
It's moderately serious. It won't usually damage your engine, but it can cause poor running and unexpected stalling, so it's best to address it soon.
It means the timing sensor is sending fewer signal pulses than the computer expects per engine revolution, often due to a worn sensor, bad wiring, or damaged teeth on the trigger wheel.