Catalytic Converter, A/F Sensor failed on the interstate when I was driving with kids in the car. Took vehicle to the nearest dealer only to be told that this is a known problem with these vehicles and it was going to cost me $3,100 to repair.
2011 Infiniti QX56 fuel system problems
20 complaints (26% of all complaints for this car). Typical mileage when it fails: 102,000.
- owner complaints
- 20
- of this car's complaints
- 26%
- typical mileage
- 102,000
- crashes
- 0
- recalls
- 0
Which part fails
Owners did not name a specific part.
At what mileage
Complaints by mileage at the time of the problem.
0k-25k
25k-50k
50k-75k
75k-100k
100k-125k
125k-150k
150k-175k
175k-200k
200k+
Infiniti QX56 fuel system problems in other years
Related recalls
No recalls on record for this model year.
What 2011 Infiniti QX56 owners say
Most recent owner complaints, unedited.
The contact owns a 2011 Infiniti QX56. The contact stated while driving approximately 25 MPH, the vehicle began to shake and inadvertently stalled. The check engine warning light was illuminated. The vehicle was taken to a local dealer where it was diagnosed with needing the high-pressure fuel tank replaced. The vehicle was repaired however, the failure persisted. The manufacturer was not informed of the failure. The failure mileage was approximately 148,000.
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.
On june 1st 2020 I took my 2011 infiniti qx56 to the shop for having the code p0087. The shop told me that I should take it to the dealership because the problems the vehicle is having are recalled under voluntary safety recall campaign. When I called my local infiniti dealership they told me my VIN # doesn't doesn't show as recalled. They dealership provided me with the phone number of infiniti consumer affairs. I called infiniti affairs and told them about my vehicle they told me that they were sorry but my VIN doesn't show up on their system. The bottom line is that every single thing that I researched and find the wrong of the vehicle comes back with a voluntary recall. Like the fuel system, timing chain, vvt solenoids, high pressure fuel pump. I use vehicle in the city and highway.
Tl* the contact owns a 2011 infiniti qx56. The contact stated that while driving at an undisclosed speed, the vehicle failed to respond with the accelerator pedal depressed. The contact stated that there was an abnormal fuel odor coming from under the hood of the vehicle. Upon investigation, the contact became aware of a possible failure with the fuel rail sensor however, the VIN was not included. Infiniti of lubbock (6225 spur 327, lubbock, tx 79424, (806)701-4444) was contacted and informed of the failure. The contact was informed that the repair cost would have to be paid for out of pocket. The vehicle was not repaired. The manufacturer was not notified of the failure. The failure mileage was 167,000.
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.
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.
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.
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.
While driving "service engine soon" light came on, noticed power loss. Diagnosed with bad catalytic converter at 85k miles
Questions about the 2011 Infiniti QX56 fuel system
Does the 2011 Infiniti QX56 have fuel system problems?
Owners have filed 20 complaints about the fuel system of the 2011 Infiniti QX56, 26% of all its complaints.
At what mileage do 2011 Infiniti QX56 fuel system problems start?
The typical (median) mileage in owner complaints is 102,000 miles.
Was there a recall on the 2011 Infiniti QX56 fuel system?
There is no recall for this problem on this model year.
What year does the Infiniti QX56 have the most fuel system problems?
The Infiniti QX56 model years with the most fuel system complaints are 2005 (25 complaints) and 2011 (20 complaints).
Other 2011 Infiniti QX56 problems
Engine 39Suspension 9Transmission 4Electrical 3Visibility 3Acceleration 2Airbags 2Body 2Steering 1Wheels 1
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