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B2193 fault code: what it means

B2193: Communication fault between ECM and BCM for the immobiliser. Engine will not start or starts intermittently.

Body · Costly if missed

Usual causes, most likely first

  1. wiring or connector fault between BCM and ECM
  2. BCM or ECM fault

B2193 by make

Nissan

Communication fault between ECM and BCM for the immobiliser. Engine will not start or starts intermittently.

Usual causes: wiring or connector fault between BCM and ECM; BCM or ECM fault

Not sure what B2193 means on your car? Ask Credov.

Before you clear it

Write the code down or photograph the scanner first. A code that comes straight back after clearing points to a fault that is still there. A car whose codes were cleared just before you arrived may be hiding one: the scanner's readiness monitors show "not ready" for a while after codes are cleared.

Researched by Credov from manufacturer and workshop sources. A fault code points to where a fault may be; a workshop confirms it with a diagnosis. Browse all fault codes.