Drive with caution — fix soon.
This code means the voltage in the fuel composition sensor circuit has dropped below the normal range, signaling a low input. It's most often caused by a short to ground in the wiring, a poor connector, or a failed sensor. It's generally a sensor or wiring issue and is fixable once a technician traces the circuit and tests the sensor.
$120 – $500
Varies by vehicle and root cause.
Usually yes. The car typically still runs, but with the fuel reading off you may notice rough idle or lower mileage, so get it diagnosed within a week or two.
A wiring or connector repair may run around $120, while replacing the fuel composition sensor with parts and labor can reach about $500.
It's moderate. It rarely strands you, but the engine relies on accurate fuel readings, so fixing it prevents drivability problems and wasted fuel down the road.
It means the circuit voltage is lower than normal, usually from a short to ground or a failed sensor. The computer flags this because it can't get a valid ethanol reading.