P2068 2018 Chevrolet Silverado Code - Fuel Level Sensor 2 Circuit High Voltage
Quick Answer
Diesel Engine The primary fuel level sensor and the secondary fuel level sensor change resistance based on fuel level. Common causes include Faulty Fuel Level Sensor, Fuel Level Sensor harness is open or shorted, Fuel Level Sensor circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- P2068 2018 Chevrolet Silverado indicates Fuel Level Sensor 2 Circuit High Voltage.
- Common causes
- Common causes include Faulty Fuel Level Sensor, Fuel Level Sensor harness is open or shorted, Fuel Level Sensor circuit poor electrical connection.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Code P2068 2018 Chevrolet Silverado Description
The primary fuel level sensor and the secondary fuel level sensor change resistance based on fuel level. The Fuel Pump Driver Control Module monitors the signal circuits of the primary fuel level sensor and the secondary fuel level sensor and sends the signal information to the Engine Control Module (ECM) for all further handling. The ECM uses this value in order to determine the fuel level. When the fuel tank is full, the resistances of both fuel level sensors are low, and the ECM senses a low signal voltage on both the signal circuits of the primary fuel level sensor and the secondary fuel level sensor. When the fuel tank is empty, the resistances of the fuel level sensors are high, and the ECM senses a high signal voltage. The ECM uses the signal circuits of the primary fuel level sensor and the secondary fuel level sensor in order to calculate the percentage of remaining fuel in the tank. The ECM sends the fuel level percentage via the serial data circuit to the instrument cluster in order to control the fuel gauge.
Gasoline Engine
The primary fuel level sensor and the secondary fuel level sensor change resistance based on fuel level. The Engine Control Module (ECM) monitors the signal circuits of the primary fuel level sensor and the secondary fuel level sensor in order to determine the fuel level. When the fuel tank is full, the resistances of both fuel level sensors are low, and the ECM senses a low signal voltage on both the signal circuits of the primary fuel level sensor and the secondary fuel level sensor. When the fuel tank is empty, the resistances of the fuel level sensors are high, and the ECM senses a high signal voltage. The ECM uses the signal circuits of the primary fuel level sensor and the secondary fuel level sensor in order to calculate the percentage of remaining fuel in the tank. The ECM sends the fuel level percentage via the serial data circuit to the instrument cluster in order to control the fuel gauge.
The Diagnostic Trouble Code (DTC) will be set if the ECM detects the signal voltage is greater than 4.7 V.
What are the Possible Causes of the DTC P2068 2018 Chevrolet Silverado?
- Faulty Fuel Level Sensor
- Fuel Level Sensor harness is open or shorted
- Fuel Level Sensor circuit poor electrical connection
- Faulty Instrument Cluster
- Faulty Engine Control Module (ECM)
How to Fix the DTC P2068 2018 Chevrolet Silverado?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
Code Tech Notes
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P2068 2018 Chevrolet Silverado code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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Frequently Asked Questions about P2068 2018 Chevrolet Silverado Code
1. What does the OBDII code P2068 mean on a 2018 Chevrolet Silverado?
P2068 indicates that the fuel level sensor 2 circuit is experiencing a high voltage condition, which means the fuel level reading may not be accurate.
2. What are the common symptoms of code P2068 in a 2018 Chevrolet Silverado?
Symptoms can include an inaccurate fuel gauge reading, a check engine light, reduced fuel efficiency, or the vehicle running out of fuel unexpectedly.
3. What causes code P2068 in a 2018 Chevrolet Silverado?
Common causes include a faulty fuel level sensor, wiring issues like damaged or corroded connectors, or a malfunctioning fuel pump module.
4. Can I drive my 2018 Chevrolet Silverado with code P2068?
While the truck may still be drivable, it’s risky because the fuel gauge might be unreliable, increasing the chance of running out of fuel unexpectedly.
5. How do I diagnose code P2068 in a 2018 Chevrolet Silverado?
Start by inspecting the wiring and connectors for damage or corrosion, then test the fuel level sensor’s resistance and voltage to confirm if it’s functioning properly.
6. How is code P2068 fixed on a 2018 Chevrolet Silverado?
Repairs often involve replacing the faulty fuel level sensor, repairing or replacing damaged wiring, or replacing the fuel pump module if necessary.
7. How much does it cost to fix code P2068 on a 2018 Chevrolet Silverado?
Repair costs vary but can range from $200 to $800 depending on whether the issue is with the sensor, wiring, or fuel pump module.
8. Can a bad fuel pump cause code P2068 on a 2018 Chevrolet Silverado?
Yes, a malfunctioning fuel pump module can cause high voltage issues in the fuel level sensor circuit, triggering the P2068 code.
9. Will clearing the P2068 code fix the problem in a 2018 Chevrolet Silverado?
Clearing the code may temporarily turn off the check engine light, but the underlying issue must be addressed to prevent the code from returning.
10. How can I prevent code P2068 from occurring in my 2018 Chevrolet Silverado?
Regular maintenance, inspecting wiring and connectors for damage, and addressing fuel system issues promptly can help prevent this code.
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