DTC P0463: Fuel Level Sensor (Gauge) Circuit High Input

Observe fuel gauge. Ensure gauge reads above empty. Add fuel if necessary. Go to next step.
Connect scan tool to Data Link Connector (DLC). Turn ignition on and use scan tool to check fuel level. If scan tool is not available, on Esteem 1.6L and Swift, measure voltage (backprobe) between ground and PCM 22-pin harness connector C23 terminal No. 11 (Pink/Blue wire on Esteem, or Yellow/Red wire on Swift). On Esteem 1.8L, measure voltage (backprobe) between ground and PCM 26-pin harness connector "E" terminal No. 8 (Pink/Blue wire). If scan tool reads 0 percent, or if DVOM reads 7 volts or more, go to next step. If readings are not as specified, problem is intermittent or due to a faulty PCM. Go to INTERMITTENTS in TROUBLE SHOOTING - NO CODES article.

Turn ignition off. Disconnect fuel level sensor harness connector. Using an ohmmeter, check for specified resistance between ground and Pink/Blue (Esteem 1.6L and 1.8L) or Yellow/Red (Swift) wire at fuel level sensor connector (fuel level sensor side). See FUEL LEVEL SENSOR RESISTANCE table. If resistance is as specified, check for an open in Pink/Blue (Esteem 1.6L and 1.8L) or Yellow/Red (Swift) wire between fuel level sensor and PCM, or an open in Black wire between fuel level sensor and ground. Repair as necessary. If resistance is not as specified, go to next step.

FUEL LEVEL SENSOR RESISTANCE

Fuel Level		Ohms
Empty
Esteem		120
Swift		100 Or More
Half		32.5
Full		10 Or Less

Check for an open in Pink/Blue wire (Esteem 1.6L and 1.8L) or Yellow/Red wire (Swift), or Black wire between connector and fuel level sensor. Repair as necessary. If wires are okay, replace fuel level sensor. Retest system.