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OBD-II Diagnostic Trouble Code
B2626

Outside antenna

B
Body
comfort / safety
2
Generic
SAE standard
6
Body subsystem
26
Outside antenna
Severity · general guide
Varies
Body/safety — depends on system
Code type
Nissan
System
Body
Model
Leaf
Years
2017
Quick answer

On the 2017 Nissan Leaf, B2626 relates to an outside (exterior) Intelligent Key antenna fault -- typically the antenna closest to a door handle has failed, lost its ground path, or stopped communicating with the BCM, causing keyless entry to be unreliable or inoperative for that zone.

What B2626 means

The 2017 Nissan Leaf ZE1 uses Nissan's Intelligent Key (I-Key) system, which operates via multiple low-frequency (LF) antennas positioned around the vehicle exterior and interior. Each antenna transmits a polling field that the key fob detects, allowing touch-to-unlock and push-to-start without removing the key from a pocket. B2626 is set by the BCM or the Intelligent Key module when the designated outside antenna -- typically the driver's or passenger's door handle unit -- fails a continuity or frequency check during self-test. The fault prevents the vehicle from detecting the I-Key in the proximity zone covered by that antenna, forcing the owner to use the physical key blade or to hold the fob against the door.

Symptoms

  • Keyless entry does not work reliably -- user must be very close to or touching the door handle for the Leaf to detect the key
  • B2626 stored in the BCM or I-Key module; requires Nissan Consult-III or equivalent scan tool to read
  • Intelligent Key warning indicator may illuminate on the instrument cluster
  • Push-button start may work normally inside the cabin if interior antennas are unaffected
  • Physical key blade inserted into door handle still operates the mechanical lock

Common causes

  • Failed outside I-Key antenna -- the door handle antenna coil can develop open-circuit winding failures, especially after door panel removal for panel repair
  • Corrosion in the antenna connector or the wiring splice behind the door trim panel
  • Damaged antenna wiring pinched in the door jamb rubber seal -- water intrusion follows and corrodes the antenna wire insulation
  • BCM software anomaly causing a false B2626 -- a Consult-III update or module reset sometimes resolves ghost faults on early ZE1 production units
  • I-Key module (BCM) internal failure in the antenna drive circuit -- rare on current-mileage vehicles

Diagnostic approach

  1. Confirm which outside antenna is assigned to B2626 using a Nissan Consult-III or compatible tool — Nissan's I-Key system labels each antenna by position. The scan tool's freeze frame or system data will identify the specific antenna number (typically Antenna 1 or 2 for front-left/right exterior). This determines which door panel must be opened for inspection.
  2. Inspect the door handle antenna wiring at the door jamb — Open the affected door and examine where the wiring exits the door panel through the rubber accordion grommet into the B-pillar or A-pillar. Flex the harness while a helper monitors scan tool I-Key data -- if antenna resistance changes when the harness is moved, there is a broken wire inside the grommet.
  3. Measure antenna resistance with a multimeter — Disconnect the outside antenna from the I-Key module harness. Measure resistance across the antenna terminals. Nissan's outside I-Key antennas typically measure 1 to 5 ohms when healthy; an open circuit reading (infinite) confirms the antenna coil has failed and the antenna assembly must be replaced.

Make & model notes

Nissan: The 2017 Leaf ZE1 uses a 30 kWh battery in the base variant (40 kWh pack became available from late 2017 onwards in some markets). The I-Key system architecture and antenna layout are the same across battery size variants -- B2626 diagnosis is identical regardless of battery pack.

Nissan: Nissan I-Key antennas on the Leaf are not shared with the remote keyless entry (RKE) 433 MHz receiver. B2626 affects the low-frequency touch-to-unlock proximity zone only -- the high-frequency remote key fob button press still works via the RKE receiver even when B2626 is active.

FAQ

Can I still drive my 2017 Nissan Leaf with B2626 active?

Yes. B2626 affects the keyless entry proximity antenna only -- the push-button start function uses interior antennas that are separate from the exterior ones. Enter the vehicle using the physical key blade (integrated into the fob) and start it normally with the push button.

Will replacing the outside door handle fix B2626 on the Nissan Leaf?

Possibly. On some Leaf variants the I-Key antenna is integrated into the door handle assembly, so replacing the handle replaces the antenna. On others, the antenna is a separate coil clipped inside the handle cavity. Check with your Nissan dealer for the correct part number.

Does B2626 affect the Nissan Leaf's charging or EV systems?

No. B2626 is a body module code related to the keyless entry antenna. It has no connection to the battery management system, charging, or traction motor.