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P1379 fault code: what it means

P1379: Diesel fuel injector circuit high. Engine may misfire or run in reduced power.

Engine and gearbox (powertrain) · Costly if missed

Usual causes, most likely first

  1. injector wiring open or shorted to power
  2. injector coil fault
  3. PCM

P1379 by make

Mazda

Diesel fuel injector circuit high. Engine may misfire or run in reduced power.

Usual causes: injector wiring open or shorted to power; injector coil fault; PCM

What the repair usually costs

Not sure what P1379 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.