P1615
OBD-II Diagnostic Code
Severity: CriticalWhat it means
P1615 means communication between the NATS (immobilizer) module and the ECM has failed.
The car may not start or may start and stall.
This is usually a wiring issue between the modules or a failed NATS control unit.
Affected Models
- Nissan Altima
- Nissan Maxima
- Nissan Sentra
- Nissan Pathfinder
- Infiniti vehicles
Common Causes
- Wiring between NATS module and ECM damaged
- NATS control unit failed
- ECM communication port fault
- Corroded connectors in the NATS circuit
How to Fix It
-
Check the wiring between the NATS module and ECM.
Look for damaged, corroded, or disconnected wires in the steering column area.
-
Check the NATS antenna ring around the ignition.
The antenna reads the key transponder.
A loose or damaged antenna causes communication failures. -
Have the NATS system diagnosed at a Nissan dealer.
The CONSULT scanner can identify whether the fault is in the NATS module, ECM, or wiring.
Frequently Asked Questions
Can P1615 cause a no-start?
Yes.
Without communication between the NATS module and ECM, the immobilizer prevents the engine from running.
Is P1615 Nissan-specific?
Yes.
P1615 is specific to Nissan and Infiniti vehicles with the NATS immobilizer system.