# P161D on the 2018 Nissan Altima

The bulletins listed name this code in NHTSA's summary, or are about the same components. A bulletin or a recall listed here may apply to the model year. None of it is a diagnosis.

This code is specific to a manufacturer and is not described here.

## Bulletins for this model year that name P161D

- [10207867](https://open.wenmarpro.com/bulletins/10207867), 2022-02-10: NISSAN; DIAGNOSIS INFORMATION FOR DTC P161D This bulletin is no longer active. Please discard previous versions of NTB19\-008.
- [10188318](https://open.wenmarpro.com/bulletins/10188318), 2021-03-06: NISSAN; DIAGNOSIS INFORMATION FOR DTC P161D This bulletin has been amended. See AMENDMENT HISTORY on the last page. Please discard previous versions of this bulletin.
- [10160180](https://open.wenmarpro.com/bulletins/10160180), 2019-05-20: NISSAN; DIAGNOSIS INFORMATION FOR DTC P161D This bulletin has been amended. See AMENDMENT HISTORY on the last page. Please discard previous versions of this bulletin.
- [10153033](https://open.wenmarpro.com/bulletins/10153033), 2019-02-19: NISSAN; DIAGNOSIS INFORMATION FOR DTC P161D SERVICE INFORMATION When key registration is unsuccessful after BCM replacement, P161D \(Immobilizer\) will set when the ignition is turned on. Possible causes \- Improper key registration \- Defective BCM \(Vehicles with Intelligent Key only\) \- EPS control unit \(Vehicles with mechanical key only\) \- Intelligent Key unit \(Vehicles with mechanical key only\) Trouble Diagnosis NOTE: If DTC B2196\-52 is stored with P161D, perform the diagnosis procedure for DTC B2196\-52 first. \- Before replacing the BCM, confirm that the keys were programmed correctly by ensuring the vehicle will start and that the lock/unlock buttons function normally. \- If any keys do not function normally, re\-register all of the keys. \- After re\-registering all of the keys, reconfirm each key's function. \- If OK, erase the code to complete the repair. \- If NG, diagnose the Key, BCM and/or EPS control unit per the ESM.