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Service bulletins for the 2011 Infiniti QX56

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

167 on file from NHTSA, as of 2026-10-19.

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By component

By trouble code

Bulletins, newest first
ITB140562021-05-10. Service bulletin. ENGINE; ELECTRICAL SYSTEM. SERVICE INFORMATION Starting with 2010 Model Year, Infiniti vehicles have been gradually incorporating a new type of DTC known as Permanent DTC or P-DTC. If a vehicle is equipped with P-DTCs, all emission related DTCs will also set a P-DTC if the MIL is turned ON. A listing of which DTCs that will also set a P-DTC is found in the DTC Index in the EC-Engine Control section of the Electronic Service Manual (ESM). If a DTC repair is performed and the DTC erased, a vehicle may fail an Emission Inspection and Maintenance test if the P-DTC is not also erased. See this bulletin for further detail.
ITB140542021-05-10. Service bulletin. EQUIPMENT; STRUCTURE:BODY:DOOR; STRUCTURE. SERVICE INFORMATION If the auto back door will not operate automatically (operates only in manual mode), first note some conditions that may cause this: * Is DTC B2420 set as "current" in the back door control unit? If the auto back door "CLOSE SW" (close switch) state does not change from ON to OFF after 3 attempts to close the auto back door, B2420 will be set and the auto feature will be disabled. Please see this bulletin for further details.
ITB140552021-05-10. Service bulletin. POWER TRAIN; ELECTRICAL SYSTEM. SERVICE INFORMATION If a customer describes lack of power or poor acceleration, perform the following checks before attempting any repair: * Check for stored DTCs. * Check if the driver is resting their left foot on the brake pedal while accelerating. Advise the customer not to rest their foot on the brake while accelerating. * Use CONSULT-III plus in Engine Data Monitor to check operation of the brake lamp circuit signal. Monitor the brake switch during the incident; it should be "OFF". Please see this bulletn for further details.
ITB10058A2021-05-10. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT; ENGINE. IF YOU CONFRIM An oil leak at the right side block ball plug behind the alternator. ACTION: Use a punch to seat the block ball plug in the hole (refer to the Service Procedure). See this bulletin for further detail.
ITB13053A2021-05-10. Service bulletin. EQUIPMENT; ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM):SOFTWARE. IF YOU CONFIRM MIL "ON" with DTC P0420 and/or P0430 (Three Way Catalyst Function), ACTION: 1. Reprogram the ECM (if needed). 2. Replace three way catalyst and A/F sensor. See this bulletin for further detail.
ITB10029A2021-05-10. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT. SERVICE INFORMATION Related to communication codes U1000, U1001, U1002, U1010: - Always diagnose the communication codes first. - When a module reports a U1000 code, it is typically operating normally; however, there is a communication error external to that module on the CAN network. - U1000 indicates an error. V-CAN diagram or CAN Diag Support Monitor provides data to determine the location of the error. See this bulletin for more information.
ITB140202021-05-10. Service bulletin. ELECTRICAL SYSTEM:WIRING; EQUIPMENT. SERVICE INFORMATION Warranty claims coding for repairing wiring harnesses for all Infiniti vehicles has changed. This bulletin gives an outline of the retailer technician?s responsibilities in assisting the retailer claims administrator to properly code a harness repair. Failure to provide correct information may result in claims suspension or rejection. See this bulletin for further detail.
ITB11048B2021-05-10. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT; EQUIPMENT ADAPTIVE/MOBILITY. SERVICE INFORMATION The rear seat headphones have an "A" channel (Ach) and a "B" channel (Bch). The channel switch is on the headphone ear pad case. If a person is sitting on the left side (driver side) of the vehicle and their headphones are set to Bch, the headphones may have static or intermittently operate (cut in and out). OR If a person is sitting on the right side (passenger side) of the vehicle and their headphones are set to Ach, the headphones may have static or intermittently operate (cut in and out). NOTE: If the headphones are set to the "correct channel" for the seating position, but still have static or do not operate, check the condition of the "AAA" headphone batteries located under the left side headphone cover. Do not replace the headphones for the above issues. See this bulletin for further detail.
ITB08024C2021-05-10. Service bulletin. ELECTRICAL SYSTEM; AIR BAGS. SERVICE INFORMATION Information necessary to service the Supplemental Restraint System (SRS) safely is included in the "RESTRAINTS" section of the Electronic Service Manual (ESM) for each vehicle IMPORTANT: Turn the ignition switch OFF, disconnect both battery terminals, and wait at least 3 minutes before performing any service on the SRS. See this bulletin for further detail.
ITB140022021-05-10. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM); ENGINE. SERVICE INFORMATION Replacement Engine Control Modules (ECMs) for many newer Infiniti vehicles are now "Blank" ECMs. Blank ECMs come without software and must be programmed (not reprogrammed) before they will function. See this bulletin for further detail.
ITB130522021-05-10. Service bulletin. ENGINE AND ENGINE COOLING; ELECTRICAL SYSTEM. SERVICE INFORMATION Intelligent Key (I-Key) systems on the Applied Vehicles use two (2) different Radio Frequencies (RF) that are similar to other wireless devices; 315 MHz and 433 MHz. In the event another wireless device (e.g. aftermarket alarm system) is transmitting at the same time as an I-Key, it can interfere with the I-Key signals being received by the BCM. If there is interference with I-Key signals, the following symptoms may occur: - The I-Key is not detected, causing: - The engine to not start (no response when the Stop/Start button is pressed) - "I-Key System Error" displayed in the instrument cluster - "No I-Key Detected" displayed in the instrument cluster - Intermittent operation of the buttons on the remote (Key FOB). - Intermittent operation of the door request switches. If a vehicle has experienced the above symptoms, or a customer has reported the above symptoms, refer to Supplemental Diagnosis / Information in this bulletin. See this bulletin for further detail.
ITB09012F2021-05-10. Service bulletin. FUEL/PROPULSION SYSTEM; EQUIPMENT. SERVICE 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 the following resources to perform diagnostics and confirm the cause of stored DTCs. ASIST: - Appropriate Service Manual diagnostic procedures - Applicable Technical Service Bulletins (TSB). Leak Test: - With CONSULT-III plus - WORK SUPPORT >> EVAP SYSTEM CLOSE. NOTE: Use Essential Tool J-42909 or equivalent to pressurize the EVAP system. - With a "Smoke" leak detection machine. Refer to the machine's Operator's Manual for proper use. Make sure the customer is informed of the proper fuel filler cap installation.
ITB12063C2021-05-10. Service bulletin. EQUIPMENT. IF YOU CONFIRM The customer reports that people on the other end of a phone call cannot hear them. Customer report may include: Voice is choppy or cuts-out, voice sounds distant, voice sounds as if speaking through a tunnel, and/or voice sounds like it's under water. ACTION 1. Reprogram (reconfigure) the Multi AV. 2. Replace the microphone and the map lamp finisher. See this bulletin for further detail.
ITB130422021-05-10. Service bulletin. ELECTRICAL SYSTEM; SEATS. IF YOU CONFIRM: Both seat heaters of the second row seats do not work. AND Fuse # 14 is found open (or "blown"). NOTE: This issue applies to both captain and bench type second row heated seating. ACTION: 1. Repair the right side second row seat: a. Clean off welding spatter on the seat hinge (the cause of harness damage), and then apply protective covering on the seat hinge. b. Repair the damaged seat harness wiring or replace the seat harness as necessary. - For repairs, refer to SERVICE PROCEDURE starting on page 3. See this bulletin for further detail.
ITB92069D2021-05-10. Service bulletin. EQUIPMENT; WHEELS. Infiniti Original Equipment or Genuine Accessory Alloy wheels, along with their finish coating (clear, chrome, titanium, etc.), are specifically developed to achieve Infiniti design and performance standards. These Original Equipment or Genuine Accessory wheels are subjected to testing to ensure they meet Infiniti's standards. Infiniti Original Equipment Alloy or Genuine Accessory wheels subjected to aftermarket chroming may no longer continue to meet these standards and may be seriously damaged. Therefore, Infiniti most strongly discourages, and recommends that these wheels NEVER be subjected to, aftermarket chroming. See this bulletin for further details.
ITB13006A2021-05-10. Service bulletin. ELECTRICAL SYSTEM. SERVICE INFORMATION This TSB is for troubleshooting of CAN Modules with "Diag-On-CAN" Diagnostics. The flow charts below are meant to troubleshoot current CAN DTCs. The flow charts are intended to diagnose one module at a time; repeat the process as needed for additional control units. Please see this bulletin for further details.
ITB11066E2021-05-10. Service bulletin. FUEL SYSTEM, GASOLINE. SERVICE 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 need to be contacted to confirm (or assist with) diagnosis and the proper repair prior to ordering an A/V control unit. This process has been suspended.
ITB00024F2021-05-10. Service bulletin. STEERING; SUSPENSION; SERVICE BRAKES. SERVICE INFORMATION - This bulletin is to assist you in responding to customer questions about brake operation, and provides diagnostic and repair information for each item listed, if any should occur. - Most brake issues fall into the following categories: a. Brake Noise: A squeak, squeal, clunk, or groan that occurs when the brakes are applied or released. b. Brake Judder: A vibration that can be felt in the vehicle, steering wheel, or brake pedal when the brakes are applied. c. Pedal Feel: The effort needed to operate the brakes is too high or too low. SERVICE PROCEDURE 1. Verify the condition by road testing the vehicle with the customer. 2. Determine the specific brake issue based on the description in the Service Information above. 3. Follow the appropriate repair procedure(s), listed on the following pages, for your specific issue. See this bulletin for further details.
ITB04038A2021-05-10. Service bulletin. SERVICE BRAKES; STEERING; WHEELS. If YOU CONFIRM: A vehicle needs to have the brake rotors resurfaced (front or rear). ACTION: Use the ProCut PFM Series on-car brake lathe to perform brake rotor resurfacing and follow the tips listed in this bulletin. - The ProCut PFM Series brake lathe has been chosen as the approved tool for rotor resurfacing. - The ProCut PFM Series brake lathe can be ordered from TECH-MATE at 1-800-662-2001. - ProCut technical support or service can be obtained by calling 1-800-543-6618. NOTE: Brake rotors may need to be resurfaced during routine brake repair or for brake "judder" incidents. - Brake judder: A brake pedal pulsation and/or steering wheel shimmy when braking that occurs when there is too much thickness variation of the brake rotors (see ITB00-024). See this bulletin for further detail.
ITB98011F2021-05-10. Service bulletin. ELECTRICAL SYSTEM. As part of an enhanced emissions test for Inspection & Maintenance (I/M), some States may require the System Readiness Test (SRT) status be checked. - The SRT is used to indicate whether the engine control module (ECM) has completed self diagnosis of major emissions systems and components. - In these instances the State may require completion of the SRT before permitting the emissions inspection to proceed. Refer to this Bulletin for further details.
ITB130162021-05-10. Service bulletin. AIR BAGS; LANE DEPARTURE. IF YOU CONFIRM One or more of the following conditions: Front passenger air bag status light is ON (illuminated) with the front passenger seat empty. Front passenger air bag status light is ON (illuminated) with an adult sitting in the front passenger seat. Seat belt warning light is ON (illuminated) with the front passenger seat empty (driver seat belt is buckled). Supplemental air bag warning light is flashing but no Air Bag DTCs are stored. ACTION 1. Visually check the front passenger seat and seat rails for any structural damage. 2. Visually check the front passenger seat for any items in the seat pockets, or any items on, under, or hanging from the seat (front, back, and sides). 3. Replace the OCS control unit. 4. Perform Zero Point Rest and check for DTCs. See this bulletin for further detail.
ITB130132021-05-10. Service bulletin. ELECTRICAL SYSTEM. SERVICE INFORMATION Improper adjustment or operation of the ASCD brake switch can cause the Automatic Speed Control Device (ASCD) to "not set" and/or DTC P0605 (ECM) to store. See this bulletin for further detail.
ITB130122021-05-10. Service bulletin. VEHICLE SPEED CONTROL; SEAT BELTS. SERVICE INFORMATION The "Lock / Unlock request buttons" that are located on the outside door handles of vehicles with Intelligent Key can be disabled (or enabled) through either the "Comfort & Conv." settings of the Audio/Visual/Navigation system, orthrough the "Combination Meter settings" depending on the vehicle model, year and trim level. NOTE: In some instances this feature may be unintentionally disabled. Please verify the status of this feature before any further diagnostic is performed. Please see this bulletin for further details.
ITB130082021-05-10. Service bulletin. WHEELS; EQUIPMENT; POWER TRAIN; BACK OVER PREVENTION. IF YOU CONFIRM: Customers concern of a "clicking" noise coming from either left or right front/rear axles during take-off/acceleration. ACTION: Apply Molykote M77 grease (P/N 44003-7S000) to the hub bearing surfaces. NOTE: * Do not remove the axle from the hub or transmission for this bulletin * Refer to the Electronic Service Manual (ESM) for model specific torque specifications. >Please see Service procedure for 2007-2011 Versa torque specifications on page 5. See this bulletin for further detail.
ITB99001A2021-05-10. Service bulletin. SUSPENSION. SERVICE INFORMATION This bulletin provides information to identify: - A leaking strut or a shock absorber that qualifies for replacement under warranty. - A strut or shock absorber that has slight oil seepage, a condition which is considered normal, does not affect strut/shock absorber operation or performance, and does not require replacement. - A strut or shock absorber that should be replaced due to rod resistance/noise issues. See this bulletin for further detail.

The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.