Here I have listed some important info you could check some of these I would suggest looking at the wiring harness and checking the pins..
I did not find this info first time last night.
So maybe you have not either.
My reply was a little slow
Good luck with this.
P1611 NISSAN Tech Notes
This code is usually triggered when a not registered or damaged key is used to start the engine. When the starting operation is carried out five or more times consecutively with the same unregistered key, the system will lock
P1611 NISSAN Possible Causes
Faulty or not programmed ignition keyFaulty IMMUFaulty Engine Control Module (ECM)
How do I fix code P1611 NISSAN
Check the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.
P1611 NISSAN Tech Notes
This code is usually triggered when a not registered or damaged key is used to start the engine. When the starting operation is carried out five or more times consecutively with the same unregistered key, the system will lock.
If the problem occurs try disconnecting the car battery for about 30 minutes and then try starting the engine with a known registered key. If the problem persists you have to have the dealer erase the code and reprogram the keys again.
Cost of diagnosing the P1611 NISSAN code
Labor: 1.0
The cost of diagnosing the P1611 NISSAN code is 1.0 hour of labor. The auto repair labor rates vary widely across the country, and even within the same city. Most auto repairs shops charge between $75 and $150 per hour
When is the P1611 NISSAN code detected?
The result of ID verification between immobilizer system unit and Engine Control Model (ECM) is negative. System initialization is required.
P1611 NISSAN Possible Symptoms
Engine Light ON (or Service Engine Soon Warning Light)Engine would not start
P1611 NISSAN Meaning
An immobilizer is an electronic device fitted to an automobile which prevents the engine from running unless the correct key is present. This prevents the car from being hotwired after entry has been achieved.
The microcircuit inside the key is activated by a small electromagnetic field which induces current to flow inside the key body, which in turn broadcasts a unique binary code which is read by the automobile's Engine Control Module (ECM). When the ECM determines that the coded key is both current and valid, the ECM activates the fuel-injection sequence.
The immobilizer function of the Infiniti Vehicle Immobilizer System (IVIS) or Nissan Anti-Theft System (NATS) consists of the following:
- NATS ignition key
- NATS antenna amp. located in the ignition key cylinder
- Body control module (BCM) or (IMMU)
- Engine Control Module (ECM)
- Security indicator lamp
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