P1612 Infiniti Code - Chain of ECM-IMMU
Quick Answer
An immobilizer is an electronic device fitted to an automobile which prevents the engine from running unless the correct key is present. Common causes include Faulty or not programmed ignition key, Faulty IMMU, Faulty Engine Control Module (ECM). Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- P1612 Infiniti indicates Chain of ECM-IMMU.
- Common causes
- Common causes include Faulty or not programmed ignition key, Faulty IMMU, Faulty Engine Control Module (ECM).
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Code P1612 Infiniti Description
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
What are the Possible Causes of the DTC P1612 Infiniti?
- Faulty or not programmed ignition key
- Faulty IMMU
- Faulty Engine Control Module (ECM)
How to Fix the DTC P1612 Infiniti?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
Code Tech Notes
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.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P1612 Infiniti code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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Frequently Asked Questions about P1612 Infiniti Code
1. What is OBDII code P1612 in Infiniti vehicles?
Code P1612 indicates a communication error between the engine control module (ECM) and the immobilizer (IMMU) system in Infiniti vehicles.
2. What are the common symptoms of OBDII code P1612 in an Infiniti?
Common symptoms of code P1612 include the vehicle not starting, the engine cranking but not firing up, and the immobilizer warning light staying illuminated on the dashboard.
3. What are some possible causes of OBDII code P1612 in an Infiniti?
Potential causes of code P1612 include a faulty immobilizer control unit, a malfunctioning ECM, issues with wiring or connections between the ECM and IMMU, or a drained car battery.
4. How can I diagnose OBDII code P1612 in my Infiniti?
Diagnosing code P1612 typically involves using a professional diagnostic scanner to retrieve the fault codes, checking the wiring and connections between the ECM and IMMU, and performing a thorough inspection of the immobilizer system.
5. Can I drive my Infiniti with OBDII code P1612?
It is not recommended to drive your Infiniti with code P1612 present, as it can lead to starting issues or potential immobilization of the vehicle while driving.
6. How can I repair OBDII code P1612 in my Infiniti?
Repairing code P1612 may involve replacing the immobilizer control unit, reprogramming the immobilizer system, checking and repairing any wiring issues, or resetting the ECM and IMMU communication.
7. Can a DIY enthusiast fix OBDII code P1612 in an Infiniti?
While some simple checks like verifying connections can be done by a DIY enthusiast, diagnosing and repairing code P1612 often requires specialized tools and knowledge, so it is recommended to seek professional help.
8. How much does it cost to fix OBDII code P1612 in an Infiniti?
The cost of fixing code P1612 can vary depending on the exact cause of the issue. Repairs may range from a simple wiring fix to replacing the immobilizer control unit, with costs potentially ranging from a few hundred to over a thousand dollars.
9. Will resetting the ECM clear OBDII code P1612 in my Infiniti?
Resetting the ECM alone may not necessarily clear code P1612 if the underlying issue between the ECM and IMMU persists. It's important to diagnose the problem accurately before attempting any resets.
10. How can I prevent OBDII code P1612 from occurring in my Infiniti?
To prevent code P1612, it's essential to maintain your vehicle's battery health, ensure proper connections between the ECM and IMMU, and address any immobilizer system warning signs promptly to prevent potential communication errors.
Discuss the causes and fixes for P1612 Infiniti OBDII Code
-
Hi...
I have a nissan sentra 1.8L - 2002, the machine does not want to live, and there is a code when scanned P1612.
how to make the engine back to life, what should I do.
oh..ya ... I've tried to unplug the battery but still can not also.
please help me
-
You have to reprogram the the key to your vehicle. If you can't reprogram the keys, the you probably have to replace the IMMU, which is the part around the ignition switch that reads the key.
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