AutoCodes – Buick – P2068 Buick

P2068 Buick Code - Fuel Level Sensor 2 Circuit High Voltage

Quick Answer

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 Buick 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.

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Code Popularity 881

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jun 29, 2022

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P2068 Buick Description

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.

OBDII Code P2068 Buick - Fuel Level Sensor 2 Circuit High Voltage - AutoCodes.com — P2068 Buick Code - Fuel Level Sensor 2 Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P2068 Buick?

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 Buick?

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.

What does this mean?

Code Tech Notes

A low fuel level can trigger this code. Before replacing any parts, try filling up the fuel tank and erasing the engine code. If the problem persists, it may be necessary to replace the fuel level sensor.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P2068 Buick 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.

Need more information about the P2068 Buick code?

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Need Help with the Code?

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P2068 Buick Code

1. What are the common symptoms of OBDII code P2068 in a Buick related to the Fuel Level Sensor 2 Circuit High Voltage issue?

- Common symptoms include erratic fuel gauge readings, fuel gauge stuck on empty or full, illuminated check engine light, and potential fuel-related issues.

2. What are the possible causes of the OBDII code P2068 in a Buick indicating a Fuel Level Sensor 2 Circuit High Voltage problem?

- The code P2068 can be triggered by issues such as a faulty fuel level sensor, damaged wiring or connectors in the fuel level sensor circuit, or a problem with the vehicle's PCM.

3. How can I diagnose the OBDII code P2068 on my Buick with the Fuel Level Sensor 2 Circuit High Voltage fault?

- Diagnosing the P2068 code involves using an OBDII scanner to read the code, checking the fuel level sensor's wiring and connectors for damage, and testing the sensor's resistance and voltage.

4. What repair tips can help fix the OBDII code P2068 related to the Fuel Level Sensor 2 Circuit High Voltage issue in a Buick?

- Repair tips may include replacing the faulty fuel level sensor, repairing damaged wiring or connectors, resetting the PCM after fixing the issue, and ensuring a proper fuel level sensor calibration.

5. Can I drive my Buick with the OBDII code P2068 indicating a Fuel Level Sensor 2 Circuit High Voltage problem?

- It is generally safe to drive your Buick with the P2068 code, but it is recommended to address the issue promptly to prevent inaccurate fuel level readings or potential fuel system problems.

6. How much does it typically cost to repair the OBDII code P2068 on a Buick due to the Fuel Level Sensor 2 Circuit High Voltage fault?

- The cost of repairing the P2068 code can vary depending on the specific issue, but it may involve expenses for a new fuel level sensor, wiring repairs, labor costs, and potential diagnostic fees.

7. Are there any preventive measures to avoid the OBDII code P2068 in a Buick related to the Fuel Level Sensor 2 Circuit High Voltage issue?

- Regularly inspecting the fuel level sensor and its connections for signs of wear or damage, using high-quality fuel, and avoiding rough handling of the sensor can help prevent the occurrence of the P2068 code.

8. How long does it usually take to repair the OBDII code P2068 on a Buick caused by the Fuel Level Sensor 2 Circuit High Voltage problem?

- The repair time can vary based on the specific issue, but fixing the P2068 code may take anywhere from an hour for simple repairs to several hours for more complex sensor replacements or wiring repairs.