# Service bulletin ITB16\-008C

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.

- Type: Service bulletin
- NHTSA id: 10191925
- Published by NHTSA: 2021\-05\-07
- Manufacturer's number: ITB16\-008C
- Manufacturer's date: 2021\-04\-01
- NHTSA component: ENGINE AND ENGINE COOLING

## NHTSA's summary

MIL ON WITH P0603 STORED FOR ECM BACK UP CIRCUIT This bulletin has been amended. See AMENDMENT HISTORY on page 3. Please discard previous versions of this bulletin.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2021/MC-10191925-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2021/MC-10191925-9999.pdf)

The document is the manufacturer's. This site does not hold it.

## Components

Engine

## Trouble codes named

P0603

## Vehicles listed

- 2015 INFINITI Q50
- 2015 INFINITI Q60
- 2015 to 2019 INFINITI Q70
- 2015 to 2017 INFINITI QX50
- 2015 INFINITI QX60
- 2015 to 2017 INFINITI QX70

## Recalls for the same vehicles and component

- [21V774000](/recalls/nhtsa/21V774000.md), 2021-10-04: HYBRID PROPULSION SYSTEM; ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE \(ECU/ECM\):SOFTWARE
- [14V583000](/recalls/nhtsa/14V583000.md), 2014-09-22: VEHICLE SPEED CONTROL:ACCELERATOR PEDAL; ENGINE AND ENGINE COOLING:ENGINE

## Other bulletins for the same vehicles and component

- [ITB17\-042E](/bulletins/10208936.md), 2022-03-12, Service bulletin: ENGINE AND ENGINE COOLING. 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 this bulletin.
- [ITB13\-044J](/bulletins/10208932.md), 2022-03-12, Service bulletin: FUEL SYSTEM, OTHER; ENGINE AND ENGINE COOLING. EVAP LEAK DTC P0442, P0455, P0456 INFORMATION This bulletin has been amended. See AMENDMENT HISTORY on the last page. Please discard previous versions of this bulletin.
- [ITB14\-011F](/bulletins/10207847.md), 2022-02-10, Service bulletin: ELECTRICAL SYSTEM; ENGINE. REMOTE ENGINE START NOT WORKING This bulletin has been amended. See AMENDMENT HISTORY on the last page. Please discard previous versions of this bulletin.
- [ITB13026E](/bulletins/10192784.md), 2021-05-10, Service bulletin: ELECTRICAL SYSTEM:ADAS:AUTONOMOUS/SELF DRIVING:SOFTWARE; ENGINE AND ENGINE COOLING:ENGINE:OIL/LUBRICATION:FILTER/SCREEN. SERVICE INFORMATION If the Display Control Unit \(DCU\) needs to be replaced on an Applied Vehicle for any reason, follow the steps in the Service Procedure of this bulletin. See this bulletin for further detail.
- [ITB16014](/bulletins/10192782.md), 2021-05-10, Service bulletin: ENGINE AND ENGINE COOLING. IF YOU CONFIRM The MIL is ON with P0116 Engine Coolant Temperature \(ECT SENSOR\) stored, and There are no drivability issues. ACTION 1. Refer to step 6 in the SERVICE PROCEDURE to confirm if ECM reprogramming applies. 2. If it applies, reprogram the ECM. See this bulletin for further detail.
- [ITB16013](/bulletins/10192781.md), 2021-05-10, Service bulletin: ENGINE AND ENGINE COOLING. IF YOU CONFIRM The MIL is ON with P0116 Engine Coolant Temperature \(ECT SENSOR\) stored, and There are no drivability issues. ACTION 1. Refer to step 6 in the SERVICE PROCEDURE to confirm if ECM reprogramming applies. 2. If it applies, reprogram the ECM. See this bulletin for further detail.
- [P5320](/bulletins/10192675.md), 2021-05-10, Service bulletin: ENGINE AND ENGINE COOLING. Infiniti is conducting a retailer inventory service action to replace the Concentric Slave Cylinder \(CSC\) Tube on 26 specific MY 2015\-16 Q60 Coupe vehicles identified in Service Comm due to a potentially out of specification O\-ring.
- [ITB11011A](/bulletins/10192630.md), 2021-05-10, Service bulletin: POWER TRAIN; ENGINE AND ENGINE COOLING; EQUIPMENT. SERVICE INFORMATION For QX60 Hybrid Vehicles, go to page 4. Q50, Q70, and M35 Hybrid Vehicles The internal combustion \(IC\) engine in the Q50, Q70, and M35 Hybrid vehicles is started using a high voltage motor that is integrated into the transmission. The high voltage motor gets its power from the high voltage Lithium\-Ion \(Li\-ion\) battery that is mounted between the trunk room and the rear seat. The Li\-ion battery cannot be recharged using an external battery charger; therefore it is very important that the battery state of charge \(SOC\) is properly maintained during extended storage periods. Action must to be taken in order to prevent excessive discharge of the high voltage Li\-ion battery during an extended storage period. If the reserve capacity of the Li\-ion battery is not sufficient, the hybrid system cannot be started. Perform the Battery Discharge Prevention During Extended Storage procedure in this bulletin once a month \(every 30 days\). NOTE: A discharged high voltage Li\-ion battery is not a warrantable issue. See this bulletin for further detail.
- [ITB13054D](/bulletins/10192609.md), 2021-05-10, Service bulletin: EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL; ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE \(ECU/ECM\). IF YOU CONFIRM: The MIL is ON with DTC P0101 and/or P010B \(MAF SEN/CIRCUIT\-B1/B2\) and there are no drivability issues. ACTION: 1. Refer to step 6 in the SERVICE PROCEDURE to confirm this bulletin applies to the vehicle you are working on. 2. If this bulletin applies, reprogram the ECM. NOTE: If this bulletin does apply \(the ECM needs to be reprogrammed\), do NOT replace the mass air flow sensor\(s\). See this bulletin for further detail.
- [ITB15024](/bulletins/10192589.md), 2021-05-10, Service bulletin: ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL. SERVICE INFORMATION After ECM reprogramming, the Calibration Verification Number \(CVN\) needs to be automatically calculated prior to State emissions testing \(also known as Inspection Maintainence, I/M, or SMOG testing depending upon location\). Allowing the vehicle to idle for 22 minutes will allow for faster CVN calculation. It is recommended that customers utilize this method if the vehicle needs to be tested for emissions soon after ECM reprogramming. See this bulletin for further detail.

JSON: [/v1/bulletins/10191925](/v1/bulletins/10191925)

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