Fuel Level Sensor Circuit High
The P2068 code indicates that the Engine Control Module (ECM) has detected a voltage signal from the fuel level sensor that is higher than the expected range. This typically means the sensor's resistance is too low (or voltage too high) due to a short circuit, faulty sensor, or wiring issue. The fuel level sensor is a variable resistor that changes resistance based on fuel level; a high voltage reading suggests the circuit is not functioning correctly, potentially causing inaccurate fuel gauge readings or other drivability concerns.
01. Most Common Causes
- Faulty fuel level sensor
- Short circuit to voltage in the sensor wiring or connector
- Corroded or damaged wiring harness
- Faulty ECM (rare)
02. Symptoms You Will Notice
- Inaccurate or erratic fuel gauge reading
- Check Engine Light illuminated
- Fuel gauge stuck on full or empty
- Possible hard starting or stalling (if fuel level is misread)
03. Step-by-Step Diagnosis
Step 1: Use a scan tool to confirm the code and check freeze frame data.
Step 2: Visually inspect the fuel level sensor wiring and connector for damage, corrosion, or shorts.
Step 3: Test the fuel level sensor resistance with a multimeter; compare to manufacturer specifications.
Step 4: Check for voltage at the sensor connector; if voltage is higher than 5V reference, repair short to voltage.
Step 5: If sensor and wiring are okay, replace the fuel level sensor.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
It is generally safe to drive short distances, but the inaccurate fuel gauge may lead to running out of fuel unexpectedly. It's best to diagnose and repair promptly.
How much does it cost to fix?▼
The cost typically ranges from $50 to $150 for parts and labor, depending on the vehicle and whether the sensor is part of the fuel pump module.