2009 Chevrolet Corvette Problems: 1 Known Issue

On the 2005-2013 Chevrolet Corvette, the C6 Corvette carries its fuel in two saddle-shaped tanks that straddle the driveline tunnel, each with its own level sender. The left tank holds the fuel pump module and its sender is Fuel Level Sensor 'A'; the right tank has a passive sender, Fuel Level Sensor 'B', and its fuel is siphoned across to the pump side. Because the right tank is drawn down first, the 'B' float and its resistor card spend much of the car's life sitting in vapor rather than submerged in gasoline, and owners report the code appearing most often when the car is driven hard on less than half a tank. That dry-wiping is what kills them: the wiper arm scrubs a dead spot or a high-resistance band into the resistive card, so the sender's output stops tracking fuel actually being burned. The PCM compares the two senders and the fuel actually consumed, and when the 'B' signal is present but not credible it sets P2066 rather than a hard open/short code such as P2067 or P2068. Owners typically describe a gauge that reads correctly on a fresh fill, then hangs at a fixed value for many miles before dropping abruptly, a Driver Information Center range-to-empty figure that goes nonsensical, and in some cases a gauge the cluster disables outright. The condition is not mechanically dangerous, but it strands owners who trust the gauge, and a stored MIL will block emissions readiness. Note that P2066 on this platform can also be provoked by a weak siphon jet pump that leaves the right tank unequally full, so the fuel level of both sides should be compared before condemning the sender.