P2068 2015 GMC Sierra 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 2015 GMC Sierra 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 2015 GMC Sierra 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 2015 GMC Sierra?
- 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 2015 GMC Sierra?
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 2015 GMC Sierra 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 2015 GMC Sierra Code
1. What are common symptoms of OBDII code P2068 on a 2015 GMC Sierra related to the Fuel Level Sensor 2 Circuit High Voltage?
The common symptoms include inaccurate fuel level readings on the gauge, fluctuating fuel readings, or the fuel gauge not working at all.
2. What are possible causes of the Fuel Level Sensor 2 Circuit High Voltage code (P2068) on a 2015 GMC Sierra?
Common causes include a faulty fuel level sensor, issues with the fuel level sensor wiring, a corroded connector, or a problem with the vehicle's PCM (powertrain control module).
3. How can I diagnose the Fuel Level Sensor 2 Circuit High Voltage issue (P2068) on my 2015 GMC Sierra?
You can diagnose this issue by checking the wiring and connectors for any damage, testing the fuel level sensor's resistance, and using a scan tool to monitor the fuel level sensor data.
4. Is it safe to drive my 2015 GMC Sierra with the OBDII code P2068 related to the Fuel Level Sensor 2 Circuit High Voltage?
It is generally safe to drive the vehicle with this code, but it is recommended to address the issue promptly to avoid running out of fuel unexpectedly.
5. Can I reset the OBDII code P2068 on my 2015 GMC Sierra related to the Fuel Level Sensor 2 Circuit High Voltage without fixing the underlying issue?
Resetting the code without fixing the problem will only temporarily clear the error code, but the issue will likely reoccur until the root cause is addressed.
6. How much does it typically cost to repair the Fuel Level Sensor 2 Circuit High Voltage issue (P2068) on a 2015 GMC Sierra?
The cost of repair can vary depending on the cause of the issue, but it may range from $200 to $500, including parts and labor.
7. Can a DIY enthusiast fix the Fuel Level Sensor 2 Circuit High Voltage problem (P2068) on a 2015 GMC Sierra?
Depending on the DIYer's skills and access to tools, it is possible to fix this issue at home by replacing the fuel level sensor or repairing any damaged wiring.
8. Will the check engine light turn off automatically after repairing the Fuel Level Sensor 2 Circuit High Voltage issue (P2068) on a 2015 GMC Sierra?
In most cases, the check engine light will turn off automatically after the repair once the vehicle's computer system detects that the issue has been resolved.
9. How important is it to address the OBDII code P2068 related to the Fuel Level Sensor 2 Circuit High Voltage on my 2015 GMC Sierra?
It is crucial to address this issue promptly as inaccurate fuel level readings can lead to running out of fuel unexpectedly, causing inconvenience and potentially damaging the vehicle's fuel system.
10. Can a malfunctioning Fuel Level Sensor 2 Circuit High Voltage (P2068) on a 2015 GMC Sierra affect the vehicle's performance?
While the issue is primarily related to the fuel level sensor, it can indirectly affect the vehicle's performance if the inaccurate fuel readings lead to running out of fuel while driving.
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