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P167B fault code: what it means

P167B: Diesel injection amount learning not completed. Usually after injector or PCM work; may idle rough or knock until learned.

Engine and gearbox (powertrain) · Minor

Usual causes, most likely first

  1. injection learning not performed after repairs
  2. learning interrupted

P167B by make

Mazda

Diesel injection amount learning not completed. Usually after injector or PCM work; may idle rough or knock until learned.

Usual causes: injection learning not performed after repairs; learning interrupted

Not sure what P167B 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.