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Nissan P1615

Difference of key

DriveNot yet established by verified evidence. If the key is not detected, the vehicle may not start.
ChargeNot yet established by verified evidence.
ServiceContact a Nissan dealer or qualified Nissan technician, particularly if the vehicle intermittently fails to detect the key or does not start.
Confidence95%

Quick answer

Nissan DTC P1615 means “Difference of key.” Verified Nissan bulletin evidence associates it with interference affecting Nissan Anti-Theft System (NATS) key signals.

This page separates verified manufacturer/regulator evidence from supporting material. Unsupported causes, repairs or safety conclusions are not guessed.

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DTC Nissan P1615 Short ExplanationMaxidot

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1. What does P1615 mean?

Nissan DTC P1615 means “Difference of key.” Verified Nissan bulletin evidence associates it with interference affecting Nissan Anti-Theft System (NATS) key signals.

2. Technical explanation

NHTSA-hosted Nissan bulletin NTB13-107F states that interference with NATS key signals can cause DTC P1615 (Difference of key) to be stored in the ECM. The bulletin also identifies B2191 (Difference of key) as a BCM code in the same condition. The reported condition may be intermittent and difficult to diagnose.

3. What system is affected?

Nissan Anti-Theft System (NATS) key-signal recognition; P1615 is stored in the ECM according to the verified bulletin.

4. How serious is this code?

Not yet established by verified evidence.

5. Symptoms you may notice

  • The NATS key may not be detected.
  • The engine may not start, with no response when the key is turned.
  • The immobilizer warning light may illuminate.
  • The condition may be intermittent and difficult to diagnose.

6. Possible causes

  • Interference with NATS key signals.
  • The verified bulletin excerpt refers to interference involving door request switches, but the specific source of interference is not established by the supplied evidence.

7. Can I still drive the vehicle?

Not yet established by verified evidence. If the key is not detected, the vehicle may not start.

8. Can I charge the vehicle?

Not yet established by verified evidence.

9. What you can safely do

  • Use the applicable Nissan service information and have the condition diagnosed by qualified personnel.
  • Record whether the immobilizer warning light appears and whether the no-start condition is intermittent.
  • Do not attempt anti-theft, ECM, BCM, or high-voltage-system repairs based on this code alone.

10. Step-by-step troubleshooting

  1. Confirm whether P1615 is present in the ECM.
  2. Check for the verified related BCM code B2191.
  3. Assess the reported NATS key-detection, no-start, and immobilizer-warning-light symptoms.
  4. Refer to the Supplemental Diagnosis / Information sections of Nissan bulletin NTB13-107F; the supplied evidence states the bulletin is intended for qualified technicians.

11. When to contact service

Contact a Nissan dealer or qualified Nissan technician, particularly if the vehicle intermittently fails to detect the key or does not start.

12. What the service center may check

  • Retrieve ECM diagnostic trouble codes and confirm P1615.
  • Retrieve BCM diagnostic trouble codes and check for B2191.
  • Diagnose potential interference with NATS key signals using Nissan’s applicable service procedures.
  • Follow the Supplemental Diagnosis / Information referenced in Nissan bulletin NTB13-107F.

13. Possible repair or resolution

  • Not yet established by verified evidence. The supplied bulletin excerpt identifies a diagnostic direction but does not provide a verified repair procedure or repair outcome.

14. Affected vehicles

15. Related TSBs / service bulletins

  • Nissan NTB13-107F, published through NHTSA as manufacturer communication 10235707 on 2023-04-27. The supplied evidence says that NATS key-signal interference may cause P1615 in the ECM and B2191 in the BCM, along with intermittent key-detection/no-start and immobilizer-warning-light symptoms.

16. Recall information

  • Not yet established by verified evidence.

17. Official manufacturer information

Official source: NHTSA-hosted Nissan manufacturer communication NTB13-107F (MC-10235707-0001): https://static.nhtsa.gov/odi/tsbs/2023/MC-10235707-0001.pdf

19. Frequently asked questions

What does Nissan P1615 mean?

It means “Difference of key.”

Can P1615 cause a no-start?

Verified Nissan bulletin evidence states that NATS key-signal interference can prevent NATS key detection and cause the engine not to start, while storing P1615 in the ECM.

Is P1615 intermittent?

It can be. The verified bulletin states that the associated symptoms are usually intermittent and can be difficult to diagnose.

What other code may occur with P1615?

The verified bulletin identifies B2191, “Difference of key,” stored in the BCM.

20. Sources & verification

Verified
Nissan P1615: Difference of key | EV Diagnostics