P0463 on GMC ENVOY — Fuel Level Sensor A Circuit High

Q: "What does P0463 mean on a GMC ENVOY?"

"P0463 indicates: Fuel Level Sensor A Circuit High. This is a emission controls code. 5 GMC ENVOY owners have reported this to NHTSA."

Q: "What are the most common causes of P0463 on GMC ENVOY?"

"Based on 5 NHTSA reports, the most commonly cited components are: Fuel System, Gasoline, Fuel System, Gasoline,Equipment, Engine And Engine Cooling. These percentages are based on the component field in owner complaints."

Q: "Is P0463 serious on my GMC ENVOY?"

"Of 5 NHTSA reports for this code on GMC ENVOY, none involved a crash or fire. However, any diagnostic code should be evaluated by a qualified mechanic."

Q: "What should I do if my GMC ENVOY shows P0463?"

"1) Check for recalls on your VIN at nhtsa.gov/recalls. 2) Get a professional diagnosis — a code alone doesn't identify the exact failed part. 3) Get 2-3 repair estimates to compare."

What P0463 Means on Your GMC ENVOY

P0463 is a diagnostic trouble code indicating: Fuel Level Sensor A Circuit High. This code relates to the emission controls system. The vehicle's computer detected a condition outside normal operating parameters and stored this code.

5 GMC ENVOY owners have reported this issue to NHTSA across model years 2005-2006. Most reports come from the 2005, 2006 model years. The most commonly reported component is Fuel System, Gasoline (60.0% of reports).

Real GMC ENVOY Owner Reports

Source: NHTSA Complaints Database

"Seems that the fuel gauge reads empty even after i fill it up. it will chime, illuminate the low fuel light and read --- for range left till empty. this has been a known issue."

— 2005 GMC ENVOY owner · FUEL SYSTEM, GASOLINE · Filed 11/01/2013

"Fuel gauge sensor 2005 envoy xl denali. 70153 miles. after fueling the vehicle fuel gauge registers empty until about an eighth of a tank has been used then the fuel gauge works just fine. have to disconnect the positive battery terminal for appx."

— 2005 GMC ENVOY owner · FUEL SYSTEM, GASOLINE,EQUIPMENT · Filed 06/18/2013

"The fuel tank level sensor is defective and could result in a subject vehicle running out of fuel, stall, and being rear ended by another vehicle. the fuel level sending unit has a variable resistor attached to a float inside the fuel tank."

— 2005 GMC ENVOY owner · FUEL SYSTEM, GASOLINE · Filed 10/15/2010

"Emissions light would come on for a day or two and then go off for weeks. when having vehicle 50,000 mile service they hooked it up to the computer and got both a p0128 bad thermostat code and a p0463 fan clutch failure code. this care is less than 3 years old and should not have these problems."

— 2005 GMC ENVOY owner · ENGINE AND ENGINE COOLING · Filed 04/16/2008

"I was driving down a hill at approximately 45 miles per hour, when suddenly my envoy just shut off."

— 2006 GMC ENVOY owner · FUEL SYSTEM, GASOLINE · Filed 05/27/2013

All reports filed by vehicle owners directly with the U.S. Department of Transportation.

📊 Complaint Trend by Model Year

4

'05

1

'06

Common Causes on GMC ENVOY

Based on NHTSA complaint component analysis for this vehicle.

FUEL SYSTEM, GASOLINE 60%

FUEL SYSTEM, GASOLINE,EQUIPMENT 20%

ENGINE and ENGINE COOLING 20%

What To Do Next

1
Check for recalls on YOUR VIN
Go to nhtsa.gov/recalls and enter your VIN. If your vehicle is covered, repairs are free.
2
Get a proper diagnosis
A code alone doesn't tell you the exact failed part. A diagnostic at a shop ($50–$150) pinpoints the root cause before you spend money on parts.
3
Compare repair quotes
Get 2–3 quotes. Dealer vs. independent shop prices often differ 30–50% for the same repair.

Frequently Asked Questions

What does P0463 mean on a GMC ENVOY? ▾

P0463 indicates: Fuel Level Sensor A Circuit High. This is a emission controls code. 5 GMC ENVOY owners have reported this to NHTSA.

What are the most common causes of P0463 on GMC ENVOY? ▾

Based on 5 NHTSA reports, the most commonly cited components are: Fuel System, Gasoline, Fuel System, Gasoline,Equipment, Engine And Engine Cooling. These percentages are based on the component field in owner complaints.

Is P0463 serious on my GMC ENVOY? ▾

Of 5 NHTSA reports for this code on GMC ENVOY, none involved a crash or fire. However, any diagnostic code should be evaluated by a qualified mechanic.

What should I do if my GMC ENVOY shows P0463? ▾

1) Check for recalls on your VIN at nhtsa.gov/recalls. 2) Get a professional diagnosis — a code alone doesn't identify the exact failed part. 3) Get 2-3 repair estimates to compare.