Drive with caution — fix soon.
This code means the computer is reading an abnormally high voltage signal from the fuel composition sensor, which measures how much ethanol is in the fuel on flex-fuel vehicles. A high input usually points to a wiring short, a bad connector, or a failed sensor. Fixes typically involve repairing the wiring or connector, or replacing the fuel composition sensor.
$120 – $400
Varies by vehicle and root cause.
Usually yes for short trips, especially if the engine still runs smoothly. But since this code can affect the fuel mixture on flex-fuel vehicles, it's best to get it checked within a week to avoid poor economy or hard starts.
Repairs typically run between $120 and $400. A simple wiring or connector fix is on the lower end, while replacing the fuel composition sensor costs more depending on your vehicle.
It's a moderate-severity code. It won't usually leave you stranded, but ignoring it can lead to drivability problems and reduced fuel economy, so it shouldn't be left unaddressed for long.
The fuel composition sensor is mainly found on flex-fuel vehicles designed to run on ethanol blends like E85. On those vehicles, a faulty sensor can cause the computer to misjudge the fuel and adjust the mixture incorrectly.