2011 Infiniti QX56 Fuel system Problems
- Complaints
- 20about this part
- Share
- 26%of 78 total for the year
- Median mileage
- 102,000miles
- Trend
- FallingComplaints filed in the last 3 full calendar years are at least 25% lower than in the 3 years before.
NHTSA recorded 20 complaints about the fuel system of the 2011 Infiniti QX56, 26% of the 78 complaints for this model year. Where a mileage was given, the median is 102,000 miles.
Example complaints
Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.
“Less than a year after I got the timing debacle fixed, I get a check engine light on 2011 QX56. According to my warranty approved mechanic both cats were gone and were not covered. This complaint is the beginning of my goal of getting assurant or Infiniti to own this problem since the combined ca and fed cat warranty is 150k miles. My warranty should cover.”
NHTSA complaint #11252448, filed 2019-08, 102,000 miles“A check engine light (cel) appeared on my 2011 Infiniti QX56 at 89k miles. Error is a bad catalytic converter on bank 1. The exact message on odb2 reader is: p0420 catalyst system efficiency below threshold bank 1. This issue just happened after I just replaced a bad o2 sensor after a cel.”
NHTSA complaint #11255738, filed 2019-09, 89,000 miles“While driving my 2011infiniti QX56 to work, the service engine light came on and the vehicle start losing power and shaking.after checking it I had codespoo21,poo87 and poo90. The codes are related to vvt solenoid and high pressure fuel pump.”
NHTSA complaint #11388665, filed 2021-01, 147,032 miles“On a full tank of gas I am only able to get about 200 miles before empty. I recently filled up the gas tank and drove 25 miles and I have 3/4 of a tank of fuel left. I mainly drive in the city, but the recent 25 mile example was highway driving with cruise control on.”
NHTSA complaint #11291203, filed 2019-12, 165,000 miles“Was driving my vehicle and first noticed a drop in fuel economy. Later it was losing power and stalling. Gave me p0090 and p0087 codes. Happened in both driving and stationary positions. Turns out my high pressure fuel pump is bad.”
NHTSA complaint #11339323, filed 2020-07, 24,000 milesRelated service bulletins
- 10185400Dec 10, 20202011 QX56; LOW FUEL WARNING LIGHT COMES ON TOO EARLY This bulletin is no longer active. Please discard previous versions of ITB11-053.
- 10180978Sep 14, 2020INFINITI; DTC P0456 CAUSED BY EVAP LEAK AT VENT CONTROL VALVE O-RING This bulletin has been amended. See Amendment History on the last page. Please discard previous versions of…
- 10152502Nov 28, 2018INFINITI; FUEL TANK IS EXTREMELY DIFFICULT TO FILL The update below was sent out to Regions and Retailers in August of this year. We are re-circulating this update to make…
- 10144497Aug 20, 2018INFINITI; FUEL TANK IS EXTREMELY DIFFICULT TO FILL This bulletin has been amended. Changes have been made throughout. It is necessary for you to read this revised procedure to…
- 10144496Aug 16, 2018INFINITI; FUEL TANK IS EXTREMELY DIFFICULT TO FILL IF CUSTOMER REPORTS: Customer routinely experiences difficulty fueling the vehicle at different fuel stations (filling nozzle…
- 10109195Mar 20, 2017INFINITI; FUEL TANK IS SLOW OR DIFFICULT TO FILL IF YOU CONFIRM The fuel tank is slow or difficult to fill (filling nozzle shuts off before tank is full). IMPORTANT: Make sure…
- 10192788Mar 29, 2016SERVICE INFORMATION If the clip for the fuel filler cap tether becomes lost or is detached for any reason, it is no longer necessary to replace the fuel filler cap. The clip or…
- 10192265Nov 15, 2013SERVICE INFORMATION If one or more of these EVAP leak DTCs are stored (P0442, P0455, P0456) on a 2007 through 2011 Infiniti vehicle, a loose fuel fill cap may be the cause. Use…
- 10053950Nov 15, 2013Infiniti: due to a loose fuel fill cap, the evap leak dtcs (p0442, p0455, p0456) are stored and may be the cause. Model years 2007-2011. No models listed.
- 10192221Jul 25, 2013SERVICE INFORMATION Part order approval from TECH LINE is no longer required when replacing the Audio Visual (A/V) Control Unit on an Applied Vehicle. Previously, TECH LINE would…
Fuel system: other model years
Other parts of the 2011 Infiniti QX56
37 complaintsSuspension
9 complaintsOther or unknown
8 complaintsTransmission and drivetrain
4 complaintsElectrical system
3 complaintsEngine cooling
3 complaintsVisibility (wipers, defrost, mirrors)
3 complaintsAir bags
2 complaintsBody and structure
2 complaintsVehicle speed control
2 complaintsEquipment
1 complaintsSteering
1 complaints
← All problems reported for the 2011 Infiniti QX56
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Nov 1, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.
To check a specific vehicle for open recalls, use its VIN at nhtsa.gov/recalls. Methodology