What Does P0463 Mean?
The fuel level sensor circuit is reporting a voltage or resistance value above the maximum expected threshold. This indicates an open circuit condition in the fuel level sender wiring or a failed sending unit with infinite resistance. The fuel gauge will typically read empty at all times regardless of actual fuel level, or the gauge may not function at all.
Common Causes
35%
Open circuit in the fuel level sender signal or ground wire
30%
Failed fuel level sending unit with open internal resistor
20%
Disconnected or loose connector at the fuel pump module
10%
Corroded connector pins creating high resistance
5%
ECM fuel level input circuit open
Diagnostic Steps
1
Disconnect the fuel pump module connector and measure the sending unit resistance between the signal and ground pins. An infinite (OL) reading confirms the sender has failed open.
2
If the sender reads within spec, check for continuity on both the signal and ground wires from the fuel tank connector to the ECM or body control module. Any open circuit needs to be traced and repaired.
3
Inspect the fuel pump module connector for backed-out pins, corrosion, or physical damage. Clean and reseat the connector, then clear codes and retest.
4
Jumper the fuel level signal wire to ground at the ECM connector with a known resistance in the sender's range — if the fuel gauge responds correctly, the issue is between the ECM and the sender.
5
Check the ground path by measuring resistance from the sender ground pin at the fuel tank connector to a known good chassis ground. Should be less than 0.5 ohms.
Estimated Repair Cost
$100 - $500
Parts + labor, varies by vehicle and location
The fuel level sensor circuit is reporting a voltage or resistance value above the maximum expected threshold. This indicates an open circuit condition in the fuel level sender wiring or a failed sending unit with infinite resistance. The fuel gauge will typically read empty at all times regardless ...
The most common cause of P0463 (Evaporative Emission Control System Pressure Sensor High Input / Fuel Level Sensor Circuit High Input) is: Open circuit in the fuel level sender signal or ground wire
Typical repair costs for P0463 range from $100 to $500, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Safe to drive, but the fuel gauge will read empty or not function. The significant risk is running out of fuel because you cannot monitor fuel level. Track consumption manually and keep the tank above a quarter at all times.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P0463 to identify the root cause.
OBDHut Mobile App
Scan codes directly from your car with the OBDHut app.
Coming Soon
Quick Info
Category
Powertrain
System
Fuel System
Difficulty
Type
Generic (SAE)
Recommended Tools
OBD2 Scanner
A quality scan tool helps you read codes, view live data, and clear faults.
