What Does P0462 Mean?
The fuel level sensor circuit is reporting a voltage or resistance value that is below the minimum expected threshold. This typically means the ECM sees a short to ground or an abnormally low resistance in the fuel level sender circuit. The fuel gauge will likely read full at all times or be pegged to one extreme, regardless of actual fuel level.
Common Causes
35%
Short to ground in the fuel level sender signal wire
30%
Failed fuel level sending unit with shorted internal resistor
20%
Corroded or water-damaged connector at the fuel pump module
10%
Pinched or chafed wiring near the fuel tank or underbody
5%
ECM fuel level input circuit failure
Diagnostic Steps
1
Disconnect the fuel pump module connector and check if the code clears or the fuel level PID changes to a high/open-circuit reading. If it does, the fault is in the sender unit or its internal wiring.
2
With the connector disconnected, measure the resistance of the fuel level sender between the signal and ground pins — compare to the manufacturer's specification. A reading near 0 ohms confirms an internal short.
3
Check for continuity between the fuel level signal wire and chassis ground with the sender disconnected. Any continuity indicates a short to ground in the wiring harness.
4
Inspect the wiring harness from the fuel tank connector along the underbody to the ECM/body module for chafing against frame rails, heat shields, or suspension components.
5
At the ECM connector, measure the voltage on the fuel level input pin with the sender disconnected — it should read the reference voltage (typically 5V). If it reads near 0V, the ECM input circuit may be faulty.
Estimated Repair Cost
$100 - $500
Parts + labor, varies by vehicle and location
The fuel level sensor circuit is reporting a voltage or resistance value that is below the minimum expected threshold. This typically means the ECM sees a short to ground or an abnormally low resistance in the fuel level sender circuit. The fuel gauge will likely read full at all times or be pegged ...
The most common cause of P0462 (Evaporative Emission Control System Pressure Sensor Low Input / Fuel Level Sensor Circuit Low Input) is: Short to ground in the fuel level sender signal wire
Typical repair costs for P0462 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 be inaccurate. The main risk is running out of fuel because the gauge may always show full. Track fuel consumption by mileage and refuel regularly.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P0462 to identify the root cause.
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Quick Info
Category
Powertrain
System
Fuel System
Difficulty
Type
Generic (SAE)
Recommended Tools
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