P143E 2018 GMC Sierra Code - Fuel Level Sensor 2 Reference Feedback Performance
Quick Answer
The P143E diagnostic trouble code (DTC) for a 2018 GMC Sierra indicates an issue with the Fuel Level Sensor 2 Reference Feedback Performance. Common causes include Faulty fuel level sensor, Damaged wiring or connectors in the fuel level sensor circuit, Malfunctioning ECM. 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
- P143E 2018 GMC Sierra indicates Fuel Level Sensor 2 Reference Feedback Performance.
- Common causes
- Common causes include Faulty fuel level sensor, Damaged wiring or connectors in the fuel level sensor circuit, Malfunctioning ECM.
- 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 P143E 2018 GMC Sierra Description
The P143E diagnostic trouble code (DTC) for a 2018 GMC Sierra indicates an issue with the Fuel Level Sensor 2 Reference Feedback Performance. This code is specifically related to the fuel level sensor in the vehicle, which is responsible for measuring the amount of fuel in the tank and sending this information to the engine control module (ECM). The ECM uses this data to calculate fuel consumption, optimize engine performance, and trigger the low fuel warning light when necessary.
Common Causes of P143E 2018 GMC Sierra
- Faulty fuel level sensor
- Damaged wiring or connectors in the fuel level sensor circuit
- Malfunctioning ECM
- Corrosion or debris in the fuel tank affecting sensor performance
- Electrical issues such as a blown fuse or relay in the fuel level sensor circuit
Symptoms of P143E 2018 GMC Sierra
- Inaccurate fuel gauge readings
- Engine stalling or hesitation
- Difficulty starting the engine
- Low fuel warning light coming on unexpectedly
- Poor fuel efficiency
How to Fix P143E 2018 GMC Sierra
- Diagnose the issue by using a scan tool to read the DTC and inspecting the fuel level sensor and related components.
- Replace the faulty fuel level sensor if it is determined to be the cause of the problem.
- Check and repair any damaged wiring or connectors in the fuel level sensor circuit.
- Test the system after repairs are completed to ensure the issue is resolved.
- Clear the DTC and reset the ECM to remove the code from the vehicle's memory.
Cost to Fix P143E 2018 GMC Sierra
The typical repair costs for addressing a P143E code on a 2018 GMC Sierra can vary depending on the specific cause of the issue. In general, replacing a faulty fuel level sensor can cost between $150 and $300, including parts and labor. However, if additional repairs or diagnostic work are needed, the total cost could be higher. It's important to consider that diagnosis time and labor rates at auto repair shops can vary, with hourly rates typically ranging from $80 to $150. Rates may be higher at dealerships or in metropolitan areas, while independent shops may offer lower prices. To get an accurate estimate, it's recommended to contact local auto repair shops for specific pricing information.
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Frequently Asked Questions about P143E 2018 GMC Sierra Code
1. What does the OBDII code P143E mean on a 2018 GMC Sierra?
The P143E code indicates an issue with the Fuel Level Sensor 2 Reference Feedback Performance, meaning the signal from the secondary fuel level sensor is out of the expected range.
2. What are the common symptoms of code P143E in a GMC Sierra?
Symptoms may include an inaccurate or fluctuating fuel gauge, a check engine light, or erratic fuel level readings.
3. What causes the P143E code to appear?
Common causes include a faulty secondary fuel level sensor, damaged wiring or connectors, a malfunctioning fuel pump module, or a software issue in the ECM.
4. Can I drive my GMC Sierra with the P143E code active?
While the truck may still be drivable, you risk running out of fuel due to inaccurate readings. It’s best to address the issue promptly.
5. How do you diagnose the P143E code?
Diagnosis involves scanning for additional codes, inspecting the fuel level sensor wiring, checking sensor signals with a multimeter, and verifying the ECM’s software is up to date.
6. How can the P143E code be fixed?
Repairs may include replacing the faulty fuel level sensor, repairing damaged wiring or connectors, or reprogramming the ECM if necessary.
7. How much does it cost to fix the P143E code?
Repair costs can vary, but replacing a fuel level sensor typically ranges from $200 to $500, including parts and labor.
8. Can a software update fix the P143E code?
In some cases, a software update for the ECM might resolve the issue if the problem is related to incorrect sensor calibration.
9. Does the P143E code affect fuel efficiency?
The code itself doesn’t directly impact fuel efficiency, but inaccurate fuel level readings can lead to running out of fuel unexpectedly.
10. What tools are needed to troubleshoot the P143E code?
Tools include an OBDII scanner, a multimeter for electrical testing, and possibly specialized fuel system diagnostic equipment.
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